[Objective] The aim was to compare and analyze microwave coherent and incoherent scattering models in a corn field. [Method] In the research, based on a coherent scattering model （Stile）, we proposed a coherent scat...[Objective] The aim was to compare and analyze microwave coherent and incoherent scattering models in a corn field. [Method] In the research, based on a coherent scattering model （Stile）, we proposed a coherent scattering model exclusive for corn, in which, physical optics （PO） and infinite-length dielectric cylinder were used to calculate single-scattering matrices of corn leaves and stalks. In addition, coherent components produced from interaction among the scattering mechanisms were also considered and this coherent model was compared with the Michigan Mi- crowave Canopy Scattering （MIMICS） model. The measured data in a corn filed in Gongzhuling in Jilin Province were used as the input parameters of the coherent and incoherent models. We simulated backscattering coefficients of VV and HH po- larization at L and C bands and made a comparison between the simulation results. [Result] The simulation results at L-band were poor, which indicated that we could not find regularity at early growth stage of vegetation. In addition, comparisons be- tween coherent and incoherent scattering models proved that the coherence triggered by the scattering mechanism was small. [Conclusion] In the research, we analyzed differences between coherent and incoherent scattering models with change of incident angle, and further analysis on the differences with change of vegetation and soil needed to be made in future.展开更多
To clarify association between armyworm（Mythimna separata） damage level and the corn growth and weed occurrence, we investigated corn plant height, stem diameter and vigor as well as weed coverage and biomass. The i...To clarify association between armyworm（Mythimna separata） damage level and the corn growth and weed occurrence, we investigated corn plant height, stem diameter and vigor as well as weed coverage and biomass. The investigations were conducted at three locations of Shaanxi Province, China which were suffered seriously from armyworm. Significant correlations were found between the parameters analyzed. At stunted corn growth and presence of plenty of weeds, the armyworm damage tended to be heavy; oppositely, when corn grew well and weed density were low, armyworm harm was the minimal. Therefore, corn growing status and weed density can significantly affect armyworm damage level. Our results imply that promoting corn growth and timely removal of weeds are conducive to reducing armyworm occurrence.展开更多
We identified a sporocarp as Agrocybe dura growing next to a living corn using PacBio sequencing.The mycoparasitism of Trichoderma spp.on A.dura were revealed by the co-occurrence network analysis.For long-read HTS da...We identified a sporocarp as Agrocybe dura growing next to a living corn using PacBio sequencing.The mycoparasitism of Trichoderma spp.on A.dura were revealed by the co-occurrence network analysis.For long-read HTS data,we updated a bioinformatic pipeline to enhance fungal taxonomic resolution.In forests,fungal sporocarps house the diverse fungicolous fungi;however,the relationships of sporocarps and associated fungal communities are rarely explored in agroecosystems.In a corn field near Gongzhuling City,Jilin Province,China,we found an epigeous sporocarp with agaricoid morphology that could grow next to the living corn plants.Using PacBio metabarcoding combined with an updated bioinformatic pipeline,we surveyed the fungal community profile along its cap,rhizomorph and hyphosphere soil at a much-improved taxonomic resolution.We identified the sporocarp,at a high probability,as Agrocybe dura,and this mushroom was significantly negatively correlated with Trichoderma hamatum and T.harzianum in the co-occurrence network.Fungal diversity in hyphosphere habitat was significantly higher than that in cap and rhizomorph habitats.Consistent with the pattern in fungal diversity,the node number,edge number,network diameter and average degree were significantly higher in hyphosphere habitat than other habitats.However,both the negative and positive cohesion were significantly higher in rhizomorph habitat than other habitats.Moreover,the z-c plot identified A.dura as the only network hub,linking multiple fungal species.The results give us a glimpse of the ecological relevance of saprobic mushrooms across the extensive northeastern black soil region of China.Our findings will aid in the assessment and forecasting of fungal diversity hotspots and their relationships with soil fertility in the‘Golden Corn Belt’of northeast China.展开更多
The health status of 18 sweet corn (Zea mays L. saccharata Sturt) hybrids classified to two types, collected from five areas in China, was examined by PDA method, and factors influencing seed health and relationships ...The health status of 18 sweet corn (Zea mays L. saccharata Sturt) hybrids classified to two types, collected from five areas in China, was examined by PDA method, and factors influencing seed health and relationships between seed health and field seedling emergence were studied. Seventeen fungal genera were isolated and Fusarium was the most frequently isolated. There were significant differences both in incidence of Fusarium and in percentage of infected seeds among 18 hybrids. Research also showed that significant and consistent differences both in seed-borne fungal taxa and in percentage of infected seeds existed between two types of sweet corn. Sugar enhanced corn is more slightly infected than super sweet corn both in fungal taxa (13 and 16, respectively) and in percentage of infected seeds (62.0 and 79.2%, respectively). There were also significant differences both in seed-borne fungal taxa and in percentage of infected seeds among five areas. Seeds from South China were most severely infected, for there were 14 fungal genera detected and the percentage of infected seeds was highly 99.1% while those from Northwest China were slightly infected, for there were 10 fungal genera detected and the percentage of infected seeds was only 14.3%. Further research showed that there were significant negative correlations both between incidence of Fusarium and percentage of field seedling emergence and between percentage of infected seeds and percentage of field seedling emergence. Percentage of field seedling emergence could be estimated by regression equations built by regression analysis.展开更多
It is an important way for realizing sustainable development of sweet corn production to stabilize and improve soil fertility of cultivated land in sweet corn production region.Through the test of sweet corn straw dir...It is an important way for realizing sustainable development of sweet corn production to stabilize and improve soil fertility of cultivated land in sweet corn production region.Through the test of sweet corn straw directly returning to the field after 6seasons for 3years,the results showed that continuous single application of chemical fertilizer is not conducive to the stability of soil fertility and yield improvement,and implementation of straw returning could receive fertility,improve soil acidic conditions,and enhance the yield of sweet corn.Compared with before the test,the single application of chemical fertilizer increased soil available phosphorus,while the contents of soil organic matter,available nitrogen and available potassium decreased by 1.08,1.18 and 2.47mg/kg respectively,and the soil pH decreased by 0.15.Under the same fertilizer conditions,organic matter contents of single and double-season straw returning increased by 0.71 and 1.29g/kg,available nitrogen increased by 17.15 and 28.27mg/kg,available phosphorus increased by 0.96 and 1.73mg/kg,available potassium increased by 2.41 and 5.92mg/kg,the soil pH increased by 0.16 and 0.2.Compared with the single application of chemical fertilizer,the average yields of single and double-season straw returning increased by 7.5%and 11.8%,and their average income increased by 87.3and 117.1yuan of per mu(667m^2)respectively.展开更多
Southern rootworm (Diabrotica undecimpunctata howardi) affects several plants such as soybean, sorghum, wheat, cucumber, alfalfa, cucurbits and it is most damaging to corn and peanuts. The pheromone based “attract an...Southern rootworm (Diabrotica undecimpunctata howardi) affects several plants such as soybean, sorghum, wheat, cucumber, alfalfa, cucurbits and it is most damaging to corn and peanuts. The pheromone based “attract and kill” strategy is one of the powerful ways to control pest population. To address our key objective of the practical utility of the synthetic pheromone, we have developed a simple synthetic strategy to produce gram scale southern corn rootworm pheromone in nine simple steps starting from S-Citronellol. The present strategy takes advantage of the existing chiral center of commercially available S-Citronellol. To get the basic carbon skeleton of the pheromone, the main step in the synthetic strategy is coupling of aliphatic units through Wittig reaction. The phosphonium salt from a non-functionalized aliphatic bromide followed by Wittig reaction improved the overall yield in the multistep synthesis of this pheromone. The large-scale production of pheromone enabled us to test it in the field.展开更多
[目的]明确36%烯肟·氟环唑SC对玉米小斑病的防治效果。[方法]以17%唑醚·氟环唑SC和30%肟菌·戊唑醇SC为对照药剂,在山东省潍坊市寒亭区高里街道河南村玉米田进行田间小区试验。[结果]36%烯肟·氟环唑SC81、108 g a.i....[目的]明确36%烯肟·氟环唑SC对玉米小斑病的防治效果。[方法]以17%唑醚·氟环唑SC和30%肟菌·戊唑醇SC为对照药剂,在山东省潍坊市寒亭区高里街道河南村玉米田进行田间小区试验。[结果]36%烯肟·氟环唑SC81、108 g a.i./hm^(2)处理对玉米小斑病效果优于对照药剂17%唑醚·氟环唑SC和30%肟菌·戊唑醇SC,54 g a.i./hm^(2)的36%烯肟·氟环唑SC处理对玉米小斑病效果与对照药剂无显著性差异。[结论]使用36%烯肟·氟环唑SC54~108 g a.i./hm^(2)在玉米小斑病发病前或发病初期茎叶均匀喷雾,间隔7~10 d再施用1次,可有效防治玉米小斑病。展开更多
To develop an efficient water use strategy for crop irrigation, we need to know how much water can be reduced without decreasing yield. A study was designed to determine corn growth stages at which water could be redu...To develop an efficient water use strategy for crop irrigation, we need to know how much water can be reduced without decreasing yield. A study was designed to determine corn growth stages at which water could be reduced without affecting grain yield, and at what soil moisture level water deficit stress begins in the plants in a silt loam soil. An experiment was conducted in a randomized complete block with a 3 × 4 factorial design in four replications, where treatments consisted of three soil moisture levels [100%, 75%, and 50% of field capacity (FC) of a silt loam soil by weight] and four growth stages [fourteen leaf stage (V14), silking (R1), milk (R3), and dent (R5) stages] in a greenhouse. Growth stages at the reproductive and grain fill stages of corn were selected because this study was intended for the Mississippi Delta, where there is frequent drought during these growth stages making irrigation necessary for corn production, whereas there is usually adequate rainfall during the vegetative growth stages. Results from this study showed that reducing soil moisture from 100% FC (fully irrigated) to 75% FC of a silt loam soil starting at the R1 growth stage in corn did not reduce yield significantly compared to yield from the 100% FC, while saving a significant amount of water. Physiological investigations at the three soil moisture treatments showed that a mild moisture deficit stress might have started at the 75% FC treatment. With further investigation, if savings in water at 75% FC result in a significant reduction in energy cost, it may be profitable to reduce soil moisture to 75% FC in a silt loam soil.展开更多
为了找到更为安全高效环保的玉米苗后除草剂替代产品,2024年在安徽省巢湖市开展了验证2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂对玉米田杂草的药效、杀草谱及对玉米的安全性等田间试验。结果表明,2.6%苯唑草酮·噻酮磺隆可分散油...为了找到更为安全高效环保的玉米苗后除草剂替代产品,2024年在安徽省巢湖市开展了验证2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂对玉米田杂草的药效、杀草谱及对玉米的安全性等田间试验。结果表明,2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂可防除一年生禾本科杂草及绝大部分阔叶杂草。施用剂量为39~58.5 g a.i./hm^(2),在玉米3~6叶期兑水600 L/hm^(2)茎叶喷雾,药后30 d,其对各种杂草的株防效为87.0%~98.1%,鲜重防效达90.7%~99.6%,且对玉米生长安全,并有较好的增产效果。展开更多
近年来,玉米田杂草对烟嘧磺隆、莠去津已经产生了较高水平的抗药性,为找到更为安全高效环保的玉米苗后除草剂替代产品,2024年在安徽省巢湖市开展田间小区试验,以验证2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂(OD)对玉米田杂草的药效、...近年来,玉米田杂草对烟嘧磺隆、莠去津已经产生了较高水平的抗药性,为找到更为安全高效环保的玉米苗后除草剂替代产品,2024年在安徽省巢湖市开展田间小区试验,以验证2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂(OD)对玉米田杂草的药效、杀草谱及对玉米的安全性。结果表明,2.6%苯唑草酮·噻酮磺隆OD的杀草谱较广,可防除一年生禾本科杂草(马唐、稗)及绝大部分阔叶杂草(反枝苋、苘麻、空心莲子草和铁苋菜)。施药后30 d,2.6%苯唑草酮·噻酮磺隆OD处理对各种杂草的综合株防效为87.3%~98.2%,综合鲜重防效达90.7%~99.6%。2.6%苯唑草酮·噻酮磺隆OD适宜使用剂量为39.0~58.5 g a.i./hm^(2),在玉米3~6叶期兑水600 L/hm^(2)茎叶喷雾,对玉米生长安全,并有较好的增产效果。展开更多
为筛选出适合河北省玉米大豆带状复合种植模式下防除杂草的有效方法,采用“一杀一封”除草技术进行了田间药效试验。试验结果表明,不同除草剂处理均对杂草具有一定的防除效果。其中,200 g/L草铵膦水剂7500 m L/hm^(2)+40%砜吡草唑悬浮剂...为筛选出适合河北省玉米大豆带状复合种植模式下防除杂草的有效方法,采用“一杀一封”除草技术进行了田间药效试验。试验结果表明,不同除草剂处理均对杂草具有一定的防除效果。其中,200 g/L草铵膦水剂7500 m L/hm^(2)+40%砜吡草唑悬浮剂450 m L/hm^(2)处理和41%草甘膦异丙胺盐水剂3000 m L/hm^(2)+960 g/L精异丙甲草胺乳油1275 m L/hm^(2)+330 g/L二甲戊灵乳油3000 m L/hm^(2)处理药后28 d的总草株防效分别达到92.3%和90.1%,且对玉米和大豆的生长无不良影响。本研究所集成的化学防控技术,较好地解决了河北省大豆玉米带状复合种植模式下杂草防控的关键问题,具有广阔的应用前景。展开更多
基金Supported by Hunan Provincial Natural Science Foundation(10JJ4027)Opening Fund of State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing(10R01)~~
文摘[Objective] The aim was to compare and analyze microwave coherent and incoherent scattering models in a corn field. [Method] In the research, based on a coherent scattering model （Stile）, we proposed a coherent scattering model exclusive for corn, in which, physical optics （PO） and infinite-length dielectric cylinder were used to calculate single-scattering matrices of corn leaves and stalks. In addition, coherent components produced from interaction among the scattering mechanisms were also considered and this coherent model was compared with the Michigan Mi- crowave Canopy Scattering （MIMICS） model. The measured data in a corn filed in Gongzhuling in Jilin Province were used as the input parameters of the coherent and incoherent models. We simulated backscattering coefficients of VV and HH po- larization at L and C bands and made a comparison between the simulation results. [Result] The simulation results at L-band were poor, which indicated that we could not find regularity at early growth stage of vegetation. In addition, comparisons be- tween coherent and incoherent scattering models proved that the coherence triggered by the scattering mechanism was small. [Conclusion] In the research, we analyzed differences between coherent and incoherent scattering models with change of incident angle, and further analysis on the differences with change of vegetation and soil needed to be made in future.
基金supported by the National Public Welfare Industry(Agriculture)Scientific Research of China(201403031)the National Key Research and Development Program of China(2017YFD0201807)the Project of Agricultural Science and Technology Innovation Transformation in Shaanxi Province,China
文摘To clarify association between armyworm（Mythimna separata） damage level and the corn growth and weed occurrence, we investigated corn plant height, stem diameter and vigor as well as weed coverage and biomass. The investigations were conducted at three locations of Shaanxi Province, China which were suffered seriously from armyworm. Significant correlations were found between the parameters analyzed. At stunted corn growth and presence of plenty of weeds, the armyworm damage tended to be heavy; oppositely, when corn grew well and weed density were low, armyworm harm was the minimal. Therefore, corn growing status and weed density can significantly affect armyworm damage level. Our results imply that promoting corn growth and timely removal of weeds are conducive to reducing armyworm occurrence.
基金supported by the National Program on Key Basic Research Project(Grant No.2022YFD1500202)the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDA28020202)the National Natural Science Foundation of China(Grant No.42277308).
文摘We identified a sporocarp as Agrocybe dura growing next to a living corn using PacBio sequencing.The mycoparasitism of Trichoderma spp.on A.dura were revealed by the co-occurrence network analysis.For long-read HTS data,we updated a bioinformatic pipeline to enhance fungal taxonomic resolution.In forests,fungal sporocarps house the diverse fungicolous fungi;however,the relationships of sporocarps and associated fungal communities are rarely explored in agroecosystems.In a corn field near Gongzhuling City,Jilin Province,China,we found an epigeous sporocarp with agaricoid morphology that could grow next to the living corn plants.Using PacBio metabarcoding combined with an updated bioinformatic pipeline,we surveyed the fungal community profile along its cap,rhizomorph and hyphosphere soil at a much-improved taxonomic resolution.We identified the sporocarp,at a high probability,as Agrocybe dura,and this mushroom was significantly negatively correlated with Trichoderma hamatum and T.harzianum in the co-occurrence network.Fungal diversity in hyphosphere habitat was significantly higher than that in cap and rhizomorph habitats.Consistent with the pattern in fungal diversity,the node number,edge number,network diameter and average degree were significantly higher in hyphosphere habitat than other habitats.However,both the negative and positive cohesion were significantly higher in rhizomorph habitat than other habitats.Moreover,the z-c plot identified A.dura as the only network hub,linking multiple fungal species.The results give us a glimpse of the ecological relevance of saprobic mushrooms across the extensive northeastern black soil region of China.Our findings will aid in the assessment and forecasting of fungal diversity hotspots and their relationships with soil fertility in the‘Golden Corn Belt’of northeast China.
文摘The health status of 18 sweet corn (Zea mays L. saccharata Sturt) hybrids classified to two types, collected from five areas in China, was examined by PDA method, and factors influencing seed health and relationships between seed health and field seedling emergence were studied. Seventeen fungal genera were isolated and Fusarium was the most frequently isolated. There were significant differences both in incidence of Fusarium and in percentage of infected seeds among 18 hybrids. Research also showed that significant and consistent differences both in seed-borne fungal taxa and in percentage of infected seeds existed between two types of sweet corn. Sugar enhanced corn is more slightly infected than super sweet corn both in fungal taxa (13 and 16, respectively) and in percentage of infected seeds (62.0 and 79.2%, respectively). There were also significant differences both in seed-borne fungal taxa and in percentage of infected seeds among five areas. Seeds from South China were most severely infected, for there were 14 fungal genera detected and the percentage of infected seeds was highly 99.1% while those from Northwest China were slightly infected, for there were 10 fungal genera detected and the percentage of infected seeds was only 14.3%. Further research showed that there were significant negative correlations both between incidence of Fusarium and percentage of field seedling emergence and between percentage of infected seeds and percentage of field seedling emergence. Percentage of field seedling emergence could be estimated by regression equations built by regression analysis.
基金Supported by Huizhou Science and Technology Support Item(2011B040010010)
文摘It is an important way for realizing sustainable development of sweet corn production to stabilize and improve soil fertility of cultivated land in sweet corn production region.Through the test of sweet corn straw directly returning to the field after 6seasons for 3years,the results showed that continuous single application of chemical fertilizer is not conducive to the stability of soil fertility and yield improvement,and implementation of straw returning could receive fertility,improve soil acidic conditions,and enhance the yield of sweet corn.Compared with before the test,the single application of chemical fertilizer increased soil available phosphorus,while the contents of soil organic matter,available nitrogen and available potassium decreased by 1.08,1.18 and 2.47mg/kg respectively,and the soil pH decreased by 0.15.Under the same fertilizer conditions,organic matter contents of single and double-season straw returning increased by 0.71 and 1.29g/kg,available nitrogen increased by 17.15 and 28.27mg/kg,available phosphorus increased by 0.96 and 1.73mg/kg,available potassium increased by 2.41 and 5.92mg/kg,the soil pH increased by 0.16 and 0.2.Compared with the single application of chemical fertilizer,the average yields of single and double-season straw returning increased by 7.5%and 11.8%,and their average income increased by 87.3and 117.1yuan of per mu(667m^2)respectively.
文摘Southern rootworm (Diabrotica undecimpunctata howardi) affects several plants such as soybean, sorghum, wheat, cucumber, alfalfa, cucurbits and it is most damaging to corn and peanuts. The pheromone based “attract and kill” strategy is one of the powerful ways to control pest population. To address our key objective of the practical utility of the synthetic pheromone, we have developed a simple synthetic strategy to produce gram scale southern corn rootworm pheromone in nine simple steps starting from S-Citronellol. The present strategy takes advantage of the existing chiral center of commercially available S-Citronellol. To get the basic carbon skeleton of the pheromone, the main step in the synthetic strategy is coupling of aliphatic units through Wittig reaction. The phosphonium salt from a non-functionalized aliphatic bromide followed by Wittig reaction improved the overall yield in the multistep synthesis of this pheromone. The large-scale production of pheromone enabled us to test it in the field.
文摘[目的]明确36%烯肟·氟环唑SC对玉米小斑病的防治效果。[方法]以17%唑醚·氟环唑SC和30%肟菌·戊唑醇SC为对照药剂,在山东省潍坊市寒亭区高里街道河南村玉米田进行田间小区试验。[结果]36%烯肟·氟环唑SC81、108 g a.i./hm^(2)处理对玉米小斑病效果优于对照药剂17%唑醚·氟环唑SC和30%肟菌·戊唑醇SC,54 g a.i./hm^(2)的36%烯肟·氟环唑SC处理对玉米小斑病效果与对照药剂无显著性差异。[结论]使用36%烯肟·氟环唑SC54~108 g a.i./hm^(2)在玉米小斑病发病前或发病初期茎叶均匀喷雾,间隔7~10 d再施用1次,可有效防治玉米小斑病。
文摘To develop an efficient water use strategy for crop irrigation, we need to know how much water can be reduced without decreasing yield. A study was designed to determine corn growth stages at which water could be reduced without affecting grain yield, and at what soil moisture level water deficit stress begins in the plants in a silt loam soil. An experiment was conducted in a randomized complete block with a 3 × 4 factorial design in four replications, where treatments consisted of three soil moisture levels [100%, 75%, and 50% of field capacity (FC) of a silt loam soil by weight] and four growth stages [fourteen leaf stage (V14), silking (R1), milk (R3), and dent (R5) stages] in a greenhouse. Growth stages at the reproductive and grain fill stages of corn were selected because this study was intended for the Mississippi Delta, where there is frequent drought during these growth stages making irrigation necessary for corn production, whereas there is usually adequate rainfall during the vegetative growth stages. Results from this study showed that reducing soil moisture from 100% FC (fully irrigated) to 75% FC of a silt loam soil starting at the R1 growth stage in corn did not reduce yield significantly compared to yield from the 100% FC, while saving a significant amount of water. Physiological investigations at the three soil moisture treatments showed that a mild moisture deficit stress might have started at the 75% FC treatment. With further investigation, if savings in water at 75% FC result in a significant reduction in energy cost, it may be profitable to reduce soil moisture to 75% FC in a silt loam soil.
文摘为了找到更为安全高效环保的玉米苗后除草剂替代产品,2024年在安徽省巢湖市开展了验证2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂对玉米田杂草的药效、杀草谱及对玉米的安全性等田间试验。结果表明,2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂可防除一年生禾本科杂草及绝大部分阔叶杂草。施用剂量为39~58.5 g a.i./hm^(2),在玉米3~6叶期兑水600 L/hm^(2)茎叶喷雾,药后30 d,其对各种杂草的株防效为87.0%~98.1%,鲜重防效达90.7%~99.6%,且对玉米生长安全,并有较好的增产效果。
文摘近年来,玉米田杂草对烟嘧磺隆、莠去津已经产生了较高水平的抗药性,为找到更为安全高效环保的玉米苗后除草剂替代产品,2024年在安徽省巢湖市开展田间小区试验,以验证2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂(OD)对玉米田杂草的药效、杀草谱及对玉米的安全性。结果表明,2.6%苯唑草酮·噻酮磺隆OD的杀草谱较广,可防除一年生禾本科杂草(马唐、稗)及绝大部分阔叶杂草(反枝苋、苘麻、空心莲子草和铁苋菜)。施药后30 d,2.6%苯唑草酮·噻酮磺隆OD处理对各种杂草的综合株防效为87.3%~98.2%,综合鲜重防效达90.7%~99.6%。2.6%苯唑草酮·噻酮磺隆OD适宜使用剂量为39.0~58.5 g a.i./hm^(2),在玉米3~6叶期兑水600 L/hm^(2)茎叶喷雾,对玉米生长安全,并有较好的增产效果。
文摘为筛选出适合河北省玉米大豆带状复合种植模式下防除杂草的有效方法,采用“一杀一封”除草技术进行了田间药效试验。试验结果表明,不同除草剂处理均对杂草具有一定的防除效果。其中,200 g/L草铵膦水剂7500 m L/hm^(2)+40%砜吡草唑悬浮剂450 m L/hm^(2)处理和41%草甘膦异丙胺盐水剂3000 m L/hm^(2)+960 g/L精异丙甲草胺乳油1275 m L/hm^(2)+330 g/L二甲戊灵乳油3000 m L/hm^(2)处理药后28 d的总草株防效分别达到92.3%和90.1%,且对玉米和大豆的生长无不良影响。本研究所集成的化学防控技术,较好地解决了河北省大豆玉米带状复合种植模式下杂草防控的关键问题,具有广阔的应用前景。
