摘要
【目的】分析稻蛙综合种养模式对土壤团粒结构和土壤养分及水稻Oryza sativa产量的影响,为构建稻蛙综合种养模式提供理论依据。【方法】2023年4—9月在浙江省杭州市临安区进行田间试验,设置4种蛙投放处理:低密度(T1,0.9万只·hm^(−2))、中密度(T2,1.2万只·hm^(−2))、高密度(T3,1.8万只·hm^(−2))和对照处理(单作水稻,ck),分析不同蛙投放密度处理下土壤团粒结构、土壤养分及水稻产量的差异。【结果】与对照相比,稻蛙综合种养模式显著降低土壤容重,显著提高土壤水稳性大团聚体质量分数(P<0.05),且随着蛙投放密度的增加,土壤水稳性大团聚体质量分数呈上升趋势。稻蛙综合种养模式对土壤全氮质量分数影响不显著,土壤铵态氮质量分数随蛙投放密度的增加呈下降趋势,但显著提高土壤硝态氮质量分数(P<0.05)。T1处理显著降低土壤全磷和速效磷质量分数,但随蛙投放密度的增加,土壤全磷和速效磷质量分数均呈增加趋势。中高密度处理显著降低土壤速效钾质量分数(P<0.05)。稻蛙综合种养模式显著降低土壤有机质质量分数(P<0.05),尤其在T2和T3处理中下降幅度较大。稻蛙综合种养模式中水稻有效穗数、结实率和产量均显著低于对照(P<0.05),其中,T3处理产量下降幅度最小,为15.49%。综合效益而言,稻蛙综合种养模式均显著高于对照处理(P<0.05),且随着投放密度的增加,综合效益呈增加趋势。【结论】高密度蛙投放处理稻蛙综合种养模式的土壤团粒结构改善最为明显,土壤养分仍能保持一定水平,水稻产量下降幅度较小,综合效益最为显著,是推荐的适宜稻蛙综合种养模式。建议可在非稻蛙共生期提高氮肥与钾肥以及有机肥施用量,维持养分平衡,稳定水稻穗数,促进丰产。
[Objective]The objective is to analyze the impact of the rice-frog integrated farming model on soil aggregate structure,soil nutrients,and rice(Oryza sativa)yield,and provide a theoretical basis for constructing rice-frog integrated farming model.[Method]Field experiments were conducted in Lin’an District,Hangzhou City of Zhejiang Province from April to September in 2023 to analyze the differences in soil aggregate structure,soil nutrients,and rice yield under different frog density treatments:low density(T1,0.9×10^(4)individuals·hm^(−2));medium density(T2,1.2×10^(4)individuals·hm^(−2));high density(T3,1.8×10^(4)individuals·hm^(−2));and control treatment(ck),rice monoculture.[Result]Compared with ck,rice-frog integrated treatments significantly(P<0.05)reduced soil bulk density and increased the content of soil water-stable macroaggregates which increased with frog density,but had no significant effect on total nitrogen content.Soil ammonium nitrogen content decreased with increasing frog density,while soil nitrate nitrogen content significantly increased.T1 treatment significantly reduced soil total phosphorus and available phosphorus contents,but with the increase of frog density,both soil total phosphorus and available phosphorus contents increased.Medium and high density treatments significantly decreased soil available potassium content.Rice-frog integrated farming model significantly reduced soil organic matter content,especially in T2 and T3 treatments where the decrease was greater.The number of effective panicles,seed setting rate,and rice yield were all significantly lower than those of ck,and the yield decreased by 15.49%in T3 treatment.However,in terms of comprehensive benefits,the comprehensive cultivation model of rice and frog was significantly higher than ck,and the comprehensive benefits increased with increasing frog density.[Conclusion]The rice-frog integrated farming model under high-density treatment has the most significant improvement in soil aggregate structure,and soil nutrients can still maintain at a certain level.The decrease in rice yield is relatively small,and the comprehensive benefits are the most significant.It is recommended as a suitable model for rice-frog integrated cultivation.It is suggested to increase the application rates of nitrogen,potassium and organic fertilizers during non-farming period to maintain nutrient balance,stabilize the number of rice panicles,and promote high yield.
作者
陈思思
汪珂宇
应利平
鲁燕君
林敏
凌强
CHEN Sisi;WANG Keyu;YING Liping;LU Yanjun;LIN Min;LING Qiang(Hangzhou Lin’an District Agroforestry Technology Promotion Center,Hangzhou 311300,Zhejiang,China;College of Environment and Resources,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China)
出处
《浙江农林大学学报》
北大核心
2025年第4期765-773,共9页
Journal of Zhejiang A&F University
基金
杭州市农业产业技术专家团队项目(202306TD11)
浙江农林大学科研发展基金资助项目(2021FR023)。
关键词
稻蛙综合种养
土壤团粒结构
土壤养分
水稻产量
rice-frog integrated farming model
soil aggregate structure
soil nutrient
rice yield
