[目的]本文旨在明确密度与灌溉量互作对76 cm等行距机采棉产量的调控效应,促进农机农艺深度融合。[方法]在新疆阿克苏棉区以‘新陆中88号’为材料,设置13.5万株·hm^(-2)(D1,低密度)、18.0万株·hm^(-2)(D2、中密度,CK)和22.5万...[目的]本文旨在明确密度与灌溉量互作对76 cm等行距机采棉产量的调控效应,促进农机农艺深度融合。[方法]在新疆阿克苏棉区以‘新陆中88号’为材料,设置13.5万株·hm^(-2)(D1,低密度)、18.0万株·hm^(-2)(D2、中密度,CK)和22.5万株·hm^(-2)(D3,高密度)3个密度处理主区,3150 m 3·hm^(-2)[I1,重度亏缺(田间持水率的50%)]、4050 m 3·hm^(-2)[I2(CK),轻度亏缺(田间持水率的75%)]和4950 m 3·hm^(-2)[I3,充分灌溉(田间持水率的100%)]3个灌溉量处理副区,研究密度和灌溉量互作对76 cm等行距机采棉干物质积累与分配、棉铃时间分布、产量及其构成因素的影响。[结果]种植密度和灌溉量的提高均能延缓花铃期后叶面积指数的下降速率。随着种植密度的提高,群体干物质积累和单位面积的结铃数均增加,但经济器官的分配比例及单铃重有所降低。增加灌溉量,群体干物质积累及经济器官分配比例呈现先升后降的趋势,但在高密度种植条件下,单铃重随灌溉量的增加呈现下降趋势。在密度与灌溉量互作条件下,D3I1的干物质快速累积量较大。进入吐絮期后,D3I1的经济器官分配比例高,使籽棉产量和水分利用效率比其他处理分别提高了3.48%~25.93%和1.14%~43.29%。[结论]在76 cm等行距种植模式下,高密度种植、重度亏缺灌溉有利于群体干物质积累量向经济器官的转移,提高单铃重、棉花产量及水分利用效率。展开更多
以Web of Science(WoS)数据库中“金属有机框架材料(MOFs)光催化性能”收录的全部有关文献为数据来源,利用CiteSpace对分别从发文量、发文作者、关键词共现等方面全面梳理和归纳MOFs材料光催化性能。结果显示,此领域的研究从2007年开始,...以Web of Science(WoS)数据库中“金属有机框架材料(MOFs)光催化性能”收录的全部有关文献为数据来源,利用CiteSpace对分别从发文量、发文作者、关键词共现等方面全面梳理和归纳MOFs材料光催化性能。结果显示,此领域的研究从2007年开始,2010—2014年缓慢增长,之后发文量迅速上升。该领域已经具有成型的研究团队,但团队间缺乏合作可能会制约其发展。未来研究热点主要集中在MOFs材料光催化性能理论研究及其规模化应用于污染物的研究。展开更多
【目的】阐明甜玉米Zea mays L. saccharata Sturt.采后在不同贮藏温度、贮藏时间下可溶性固形物含量和挥发性风味物质的变化规律,为甜玉米采后品质性状研究奠定基础。【方法】以‘奥弗兰’、‘王朝’、‘广良甜27’3个甜玉米品种为材料...【目的】阐明甜玉米Zea mays L. saccharata Sturt.采后在不同贮藏温度、贮藏时间下可溶性固形物含量和挥发性风味物质的变化规律,为甜玉米采后品质性状研究奠定基础。【方法】以‘奥弗兰’、‘王朝’、‘广良甜27’3个甜玉米品种为材料,利用手持数显糖度计测定可溶性固形物含量;同时采用顶空固相萃取法,通过色谱-质谱联用仪测定3个品种在常温(室温)和4℃低温储存条件下挥发性风味成分,结合多元统计分析对不同品种的挥发性风味成分进行分析。【结果】与常温储藏相比,甜玉米在低温储藏时可溶性固形物含量下降缓慢。在常温和低温储存条件下分别检测到58和59种挥发性物质,主要为烷烃类和酯类物质。不同品种在不同储藏条件下挥发性风味物质种类存在一定差异,共有的挥发性风味物质有8种,分别为3,8-二甲基癸烷、3-甲基十一烷、正十二烷、十四烷、3-甲基十五烷、十六酸乙酯、正十九烷和正十六烷。偏最小二乘判别分析(Partial least squares discriminant analysis,PLS-DA)表明,常温和低温储藏时分别鉴定到9和10种变量重要性投影(Variable importance projection,VIP)>1的关键挥发性物质,常温和低温储藏时‘奥弗兰’共有的关键挥发性物质为(+)-环苜蓿烯,‘王朝’为正十二烷。【结论】储藏温度和时间均会影响甜玉米可溶性固形物含量及挥发性物质的种类和含量。展开更多
Background:Cottonseed oil and protein content as well as germination traits are major indicators of seed quality.However,the responses of these indicators to plant density and mepiquat chloride(MC)are still uncertain....Background:Cottonseed oil and protein content as well as germination traits are major indicators of seed quality.However,the responses of these indicators to plant density and mepiquat chloride(MC)are still uncertain.To investigate plant density and MC effects on cotto nseed yield and main quality parameters,we con ducted a twoyear field experiment including four plant densities(1.35,2.55,3.75 and 4.95 plants·m^-2)and two closes of MC(0 and 135g·hm^-2)in Dafeng,Jiangsu Province,in 2013 and 2014.Results:The application of MC reduced plant height,fruit branch length and fruiting branch number under different plant densities,resulting in a lower and more compact plant canopy.Cottonseed yield showed a nonlinear increase as plant density increasing and achieved the highest value at 3.75 plants·m^-2,regardless of MC application.No significant interactio ns were found between plant density and MC for cotton seed yield and quality parameters.The 100-seed weight,cottonseed oil content and vigor index significantly decreased as plant density increased,while these parameters significantly increased with MC applying under different plant densities.Seed vigor index was positively correlated with 100-seed weight and seed oil con tent across different plant densities and MC treatments.Conclusions:Thus,application of MC could realize a win-win situation between cottonseed yield and main quality parameters under various densities;and plant density of 3.75 plants·m^-2 combined with 135 g·hm^-2 of MC applying is optimal for high cottonseed yield and quality in this cotton production area.展开更多
文摘[目的]本文旨在明确密度与灌溉量互作对76 cm等行距机采棉产量的调控效应,促进农机农艺深度融合。[方法]在新疆阿克苏棉区以‘新陆中88号’为材料,设置13.5万株·hm^(-2)(D1,低密度)、18.0万株·hm^(-2)(D2、中密度,CK)和22.5万株·hm^(-2)(D3,高密度)3个密度处理主区,3150 m 3·hm^(-2)[I1,重度亏缺(田间持水率的50%)]、4050 m 3·hm^(-2)[I2(CK),轻度亏缺(田间持水率的75%)]和4950 m 3·hm^(-2)[I3,充分灌溉(田间持水率的100%)]3个灌溉量处理副区,研究密度和灌溉量互作对76 cm等行距机采棉干物质积累与分配、棉铃时间分布、产量及其构成因素的影响。[结果]种植密度和灌溉量的提高均能延缓花铃期后叶面积指数的下降速率。随着种植密度的提高,群体干物质积累和单位面积的结铃数均增加,但经济器官的分配比例及单铃重有所降低。增加灌溉量,群体干物质积累及经济器官分配比例呈现先升后降的趋势,但在高密度种植条件下,单铃重随灌溉量的增加呈现下降趋势。在密度与灌溉量互作条件下,D3I1的干物质快速累积量较大。进入吐絮期后,D3I1的经济器官分配比例高,使籽棉产量和水分利用效率比其他处理分别提高了3.48%~25.93%和1.14%~43.29%。[结论]在76 cm等行距种植模式下,高密度种植、重度亏缺灌溉有利于群体干物质积累量向经济器官的转移,提高单铃重、棉花产量及水分利用效率。
文摘以Web of Science(WoS)数据库中“金属有机框架材料(MOFs)光催化性能”收录的全部有关文献为数据来源,利用CiteSpace对分别从发文量、发文作者、关键词共现等方面全面梳理和归纳MOFs材料光催化性能。结果显示,此领域的研究从2007年开始,2010—2014年缓慢增长,之后发文量迅速上升。该领域已经具有成型的研究团队,但团队间缺乏合作可能会制约其发展。未来研究热点主要集中在MOFs材料光催化性能理论研究及其规模化应用于污染物的研究。
基金financial support from the Special Fund for Agro-scientific Research in the Public Interest(201503109)the Fundamental Research Funds for the Central Universities(KYYJ201802)+1 种基金Jiangsu Collaborative Innovation Center for Modern Crop Production(JCIC-MCP)Jiangsu Overseas Research and Training Program for University Prominent Young and Middleaged Teachers and President(2016),China
文摘Background:Cottonseed oil and protein content as well as germination traits are major indicators of seed quality.However,the responses of these indicators to plant density and mepiquat chloride(MC)are still uncertain.To investigate plant density and MC effects on cotto nseed yield and main quality parameters,we con ducted a twoyear field experiment including four plant densities(1.35,2.55,3.75 and 4.95 plants·m^-2)and two closes of MC(0 and 135g·hm^-2)in Dafeng,Jiangsu Province,in 2013 and 2014.Results:The application of MC reduced plant height,fruit branch length and fruiting branch number under different plant densities,resulting in a lower and more compact plant canopy.Cottonseed yield showed a nonlinear increase as plant density increasing and achieved the highest value at 3.75 plants·m^-2,regardless of MC application.No significant interactio ns were found between plant density and MC for cotton seed yield and quality parameters.The 100-seed weight,cottonseed oil content and vigor index significantly decreased as plant density increased,while these parameters significantly increased with MC applying under different plant densities.Seed vigor index was positively correlated with 100-seed weight and seed oil con tent across different plant densities and MC treatments.Conclusions:Thus,application of MC could realize a win-win situation between cottonseed yield and main quality parameters under various densities;and plant density of 3.75 plants·m^-2 combined with 135 g·hm^-2 of MC applying is optimal for high cottonseed yield and quality in this cotton production area.
