上海农业学报2025，Vol.41Issue(2)：41-48,8.DOI:10.15955/j.issn1000-3924.2025.02.06
遮光和穗肥施氮量对优质杂交稻生长与产量的影响
Effects of shading and ear fertilizer nitrogen application on the growth and yield of high-quality hybrid rice
摘要
Abstract
In order to clarify the effects of shading and ear fertilizer nitrogen application on the growth and yield of high-quality hybrid rice,hybrid indica rice 'Jinlongyou 589' and 'Shenyou Yuehe Silk seedling' were used as experimental materials to compare the effects of different shading treatments and ear fertilizer nitrogen application rates on chlorophyll content,dry matter and yield of hybrid rice.The results showed that the chlorophyll content of hybrid rice could be increased by reducing the amount of nitrogen fertilizer at the panicle stage under natural light conditions,and the contents of 'Jinlongyou 589' and 'Shenyou Yuehe Silk seedling'were the highest under N1 treatment,while under shading treatment,compared with other nitrogen fertilizer treatments,the chlorophyll content of hybrid rice was the highest under N1 treatment,which indicating that different shading and panicle fertilizer nitrogen application rates were conducive to maintaining a higher level of total chlorophyll content.Shading reduced the dry matter accumulation of hybrid rice,and 'Shenyou Yuehe Silk seedling' had higher dry matter mass than 'Jinlongyou 589'.Under natural light conditions and shading,the dry matter transport of 'Shenyou Yuehe Silk seedling' was the highest under N2(75 kg/hm2)ear fertilizer application,which was 4 513.59 kg/hm2 and 4 896.89 kg/hm2,respectively.The results indicated that the appropriate reduction of ear fertilizer dosage under shading treatment was conducive to the transport of dry matter.Shading at heading stage showed a decreasing trend in the yield components and yield of hybrid rice.Under natural light conditions,increasing the nitrogen application rate of panicle fertilizer could increase the yield of hybrid rice,and the yield of 'Jinlongyou 589 'was the highest under 75 kg/hm2 treatment,reaching 10 762.37 kg/hm2,and the yield of 'Shenyou Yuehe Silk seedling' was the highest under 105 kg/hm2 treatment,which was 11 037.42 kg/hm2.Compared with other nitrogen fertilizer treatments,the yield of N1(60 kg/hm2)was the highest under shading treatment,and the yields of 'Jinlongyou 589' and' Shenyou Yuehe Silk seedling' reached 8 426.34 kg/hm2 and 9 044.72 kg/hm2,respectively.Compared with natural light,shading reduced the dry matter accumulation and yield of hybrid rice,but maintained a higher yield under the conditions of shading and ear fertilizer nitrogen application at 60 kg/hm2.This study can provide a theoretical basis for the updating of high-yield optimization cultivation technology of high-quality hybrid rice in low-light and low-light areas of Sichuan.关键词
遮光/穗肥施氮量/杂交籼稻/干物质/产量Key words
Shading/Ear fertilizer nitrogen application/Hybrid indica rice/Dry material/Yield分类
农业科学引用本文复制引用
杨尔倮,梅岫峰,李燕容,文泰深,邓俊,王然,张荣萍,马鹏..遮光和穗肥施氮量对优质杂交稻生长与产量的影响[J].上海农业学报,2025,41(2):41-48,8.基金项目
国家重点研发计划项目(2023YFD2301903) （2023YFD2301903）
国家现代农业产业技术体系四川创新团队项目(SCCXTD-2024-1) （SCCXTD-2024-1）
自贡市校地科技合作专项资金项目(2022CDZG-22) （2022CDZG-22）
