生态学杂志2018，Vol.37Issue(2)：430-437,8.DOI:10.13292/j.1000-4890.201802.023
紫云英翻压量与不同施氮量对水稻生长和氮素吸收利用的影响
Effects of Chinese milk vetch as a green manure and nitrogen fertilization on rice growth and nitrogen absorption and utilization of rice
摘要
Abstract
The purpose of this experiment is to screen out the optimal match ratio of the recycling amount of Chinese milk vetch (Astragalus sinicus L.) and the application level of nitrogen fertilizer and thus to provide theoretical basis for improving rice production.This experiment adopted a split plot design with no application of Chinese milk vetch or nitrogen as control one (CK1),the conventional nitrogen application level (180 kg · hm-2) as control two (CK2).The application of Chinese milk vetch included two levels:27000 and 45000 kg · hm-2(designated M1 and M2 respectively),and the application of nitrogen fertilizer included four levels:0,60,120 and 180 kg · hm-2(designated N0,N1,N2,N3 respectively).The effects of coupling different amounts of Chinese milk vetch and nitrogen on rice yield,dry matter accumulation and nitrogen use efficiency of rice were examined.The results showed that the applications of 27000 kg · hm-2 of Chinese milk vetch + N ≥120 kg · hm-2 and 45000 kg · hm-2 of Chinese milk vetch + N ≥60 kg · hm-2 could ensure the rice yield and growth.M1N2 had the highest yield,being 11.56％ higher than CK2.In the ripening stage of rice,dry matter accumulation of M2N1 was the highest,being 21.41％ higher than CK2;nitrogen absorption amount of M2N3 was maximum,being 5.32％ higher than CK2.The apparent and real utilization of nitrogen fertilizer decreased with the increases of nitrogen application level.The treatments of M1N2 and M2N1 can ensure the rice yield and improve the utilization rate of nitrogen fertilizer,which would be beneficial to the efficient utilization of resources.关键词
紫云英/氮肥/水稻产量/干物质/氮素吸收Key words
Chinese milk vetch/nitrogen fertilizer/rice yield/dry matter/nitrogen absorption引用本文复制引用
张颖睿,杨滨娟,黄国勤..紫云英翻压量与不同施氮量对水稻生长和氮素吸收利用的影响[J].生态学杂志,2018,37(2):430-437,8.基金项目
国家重点研发计划课题“长江中游双季稻三熟区资源优化配置机理与高效种植模式”(2016YFD0300208)资助. （2016YFD0300208）
