江西农业大学学报2024，Vol.46Issue(4)：819-829,11.DOI:10.3724/aauj.2024073
稻虾轮作模式下氮肥运筹对水稻产量与品质的影响
Effects of nitrogen fertilizer management on rice yield and quality under rice shrimp rotation system
摘要
Abstract
[Objective]The aim of this study was to explore the effects of nitrogen fertilizer management on rice yield and quality under rice shrimp rotation mode.[Method]Using Yexiangyou Mingyuesimiao and Nongxiang 42 as experimental materials,different nitrogen application mounts and ratios at different stages were designed.[Result]With a 15%or 30%reduction based on the conventional nitrogen application amount(195 kg/hm2),the yield of Yexiangyou Mingyuesimiao did not significantly decrease,while the yield of Nongxiang 42 significantly increased.When the ratio of basal fertilizer:tillering fertilizer:panicle fertilizer was 4∶4∶2,the number of grains per panicle,seed setting rate and 1 000-grain weight of Yexiangyoumingyuesimiao were the highest,and the yield was the highest.When the ratio of basal fertilizer:tillering fertilizer:panicle fertilizer was 5∶3∶2,the effective panicle number per unit area,grain number per panicle,seed setting rate and 1 000-grain weight of Nongxiang 42 were the largest,and the yield was the highest.With the decrease of nitrogen application rate,the milled rice rate of Yexiangyou Mingyuesimiao and amylose content was significantly increased,while the protein content was significantly reduced.The peak viscosity and breakdown viscosity showed a trend of first increasing and then decreasing,reaching their maximums with the nitrogen application amount of 165.8 kg/hm2.When the ratio of basal fertilizer:tillering fertilizer:panicle fertilizer was 4∶4∶2 for Yexiangyou Mingyuesimiao and 5∶3∶2 for Nongxiang 42,the milled rice rate,head milled rice rate,gel consistency,peak viscosity and breakdown viscosity were the highest,while chalky grain rate,chalkiness degree,and amylose content were the lowest.[Conclusion]Under the rice-shrimp rotation system,reducing nitrogen application rate by 15%-30%and applying nitrogen at a ratio of 4∶4∶2 or 5∶3∶2 is beneficial to rice nitrogen efficiency,high quality and high yield.关键词
稻虾轮作/施氮量/施肥比例/水稻/产量/品质Key words
rice-shrimp rotation/nitrogen application amount/nitrogen application ratio/rice/yield/quality分类
农业科技引用本文复制引用
李炜星,狄一春,蔡怡聪,陈小荣,孙晓棠,贺浩华,朱昌兰..稻虾轮作模式下氮肥运筹对水稻产量与品质的影响[J].江西农业大学学报,2024,46(4):819-829,11.基金项目
江西省重点研发计划项目(20192ACB60009)和江西省稻田综合种养产业技术体系(JXARS-12)Project supported by the Key Research and Development Project of Jiangxi Province(20192ACB60009)and the Technical System of Rice Field Comprehensive Planting and Breeding Industry of Jiangxi Province(JXARS-12) （20192ACB60009）
