江西农业大学学报2016，Vol.38Issue(4)：607-615,9.DOI:10.13836/j.jjau.2016087
冬种紫云英和稻草还田下氮钾肥减量施用对双季水稻产量和养分吸收的影响
Yield and Nutrient Uptake of Double Rice Affected by Winter Legume Covering (Astragalus sinicus L.) and Straw Retention with Reduced Rates of Inorganic Nitrogen and Potassium Fertilizers
摘要
Abstract
A large host of research indicates that organic amendments could increase crop yield,soil fertil⁃ity,and the sustainability of cropland productivity.However,not so much information has been reported regard⁃ing the effect of organic fertilizers on reducing the rates of inorganic fertilizers.The aim of the present field stud⁃y was to investigate the effect of winter legume covering (Astragalus sinicus L.) and straw retention on reduc⁃ing the rates of inorganic nitrogen (N) and potassium (K) fertilizers in a double rice system.A field experi⁃ment was conducted in a double rice cropping system in 2013—2014,with five treatments:(1) non⁃fertilized control (CK);(2) inorganic N,phosphorus (P),and K fertilization(NPK);(3) winter legume covering and straw retention plus inorganic NPK fertilizers (GM+RS);(4) winter legume covering and straw retention with 20% less inorganic NK fertilizers (G+S-20%);and (5) winter legume covering and straw retention with 40%less inorganic NK fertilizers (G+S-40%).The results showed that compared to the NPK treatment,the GM+RS treatment tended to increase rice yield,but only statistically significantly in the early rice season in 2014. The G+S-20% treatment did not significantly affect rice yield,even significantly increased the yield of early rice in 2014.The G+S-40% treatment tended to reduce rice yield,but without statistical difference except the early rice in 2014.Rice yield was mainly affected by the number of effective panicles.No significant difference in N uptake was found between the NPK and G+S-20% treatments.The G+S-40% tended to reduce the N up⁃take of rice in 2013,but without significant difference,whereas significant difference was observed in 2014. Compared to the NPK treatment,both the G+S-20% and G+S-40% significantly increased the P and K up⁃take of early rice,while no significant difference or declining trend were found in late rice.These results indi⁃cate that winter legume covering and straw retention could significantly save inorganic fertilizers,and there is room for reducing the rates of inorganic P and K for early rice in the present cropping system.关键词
双季稻/紫云英/稻草还田/氮/钾Key words
double rice/Astragalus sinicus L./straw retention/nitrogen/potassium分类
农业科技引用本文复制引用
黄山,汤军,廖萍,曾勇军,潘晓华,石庆华..冬种紫云英和稻草还田下氮钾肥减量施用对双季水稻产量和养分吸收的影响[J].江西农业大学学报,2016,38(4):607-615,9.基金项目
国家“十二五”科技支撑计划项目（2012BAD14B14、2013BAD07B12）和中国博士后科学基金Project supported by the National Key Technology Research and Development Program （2012BAD14B14，2013BAD07B12） and the China Postdoctoral Science Foundation （）
