秸秆还田中稻基施钾肥减量效果研究
Effects on Reduced Base Application of Potash Fertilizer of Middle-season Rice in Wheat Straw Returning
吴传胜 1王优旭 1李秀珍 1亢四毛2
作者信息
- 1. 安徽省东至县种植业管理局,安徽东至 247200
- 2. 安徽省东至县尧渡镇农业技术推广站,安徽东至 247200
- 折叠
摘要
[目的]研究在小麦秸秆全量还田条件下,中稻基施钾肥减量效果,为中稻钾肥减量提供科学依据.[方法]在小麦秸秆全量还田下,开展中稻基施钾肥试验.[结果]在秸秆全量还田条件下,基施钾肥减少20%的处理⑤产量、钾素吸收量、钾素(肥)利用率最高.产量、钾素吸收量分别为9 806.5、265.0 kg/hm2,与全量施钾肥处理②相比,分别提高388.7、45.5 kg/hm2,增幅分别为4.1%、20.7%;钾素、钾肥利用率分别为53.2%、60.3%,比全量施钾肥处理②分别提高15.8%、22.9%;通过二次拟合,得出最大基施钾肥减量占总量的21.7%,可减少基施钾肥35.8 kg/hm2.[结论]在小麦秸秆全量还田条件下,基施钾肥适当减量对中稻产量有一定增产作用,秸秆中的养分释放可不同程度地减少部分钾肥施用,较大地提高钾素吸收量、钾素利用率、钾肥利用率.
Abstract
[Objective] To study effects on reduced base application of potash fertilizer of middle-season rice in wheat straw returning, in order to provide scientific basis for reducing potash fertilizer application of middle-season rice.[Method] The largest reduced application of potash used as basal fertilizer of middle-season rice was studied in the case of wheat straw completely returning.[Result] In the case of wheat straw returning and base application of potash fertilizer reduced by 20%⑤,the yield of middle-season rice,potassium absorptive amount,potassium utilization rate of potassium and potash fertilizer were the highest.The rice yield and potassium absorptive amount were 9 806.5,265.0 kg/hm2 respectively,which were 388.7 kg/hm2 (4.1%) and 45.5 kg/hm2 (20.7%) higher than the treatment of complete application of potash fertilizer ②.And the potassium utilization rate of potassium and potash fertilizer were respectively 53.2% and 60.3%,which were 15.8% and 22.9% higher than the treatment of complete application of potash fertilizer ②.The largest reduced application of potash fertilizer was 21.7% of total application of potash fertilizer,which was 35.8 kg/hm2 by quadratic fitting.[Conclusion] Reasonable reduced application of potash fertilizer of middle-season rice had certain effect to increase rice yield in the case of wheat straw completely returning,and the nutrient releasing of wheat straw can partly reduce the application of potash fertilizer in different degree,greatly increase potassium absorptive amount,potassium utilization rate of potassium and potash fertilizer.
关键词
秸秆还田/钾肥/减量效果/钾肥利用率Key words
Straw returning/Potash fertilizer/Reducing effect/Utilization rate of potash fertilizer引用本文复制引用
出版年
2017
国家科技期刊平台
NSTL
维普
万方数据