干旱地区农业研究Issue(3)：171-176,6.DOI:10.7606/j.issn.1000-7601.2015.03.28
长期保护性耕作对黄土高原旱地土壤养分和作物产量的影响
Long-term effects of tillage system on soil nutrients and grain yields in rainfed area of Loess Plateau
摘要
Abstract
This study determined the long-term effects of tillage systems on soil nutrients and crop productivity in a semiarid environment .A long-term field study was initiated at Dingxi , the western Loess Plateau of China , in 2001 . Field pea ( Pisum sativum L .) in rotation with spring wheat ( Triticum aestivum L .) were grown under six tillage sys-tems :conventional tillage (T ) , conventional tillage with stubble incorporating (TS ) , no-till with no stubble retention (NT) ,no-till with stubble retention (NTS) ,conventional tillage with plastic film mulching (TP) ,and no-till with plas-tic mulching (NTP) .The results showed that ,compared with the pretreatment ,six tillage systems increased soil organic carbon by 4 .92% ~18 .05% ,available N by 17 .98% ~31 .08% ,available P by 143 .04% ~212 .87% .However , compared with the pretreatment ,six tillage systems decreased available K by 2 .75% and 6 .26% under NTS and TS ,re-spectively .The average grain yields in a six-years term were highest under NTS with stubble retention for both spring wheat and field pea(2 030 vs .1 381 kg·hm-2 ) ,and lowest under NT without stubble retention for both spring wheat and field pea (1 608 vs .1 060 kg · hm-2 ) .Conventional tillage with stubble incorporating could improve soil fertility , but this practice could not increase grain yield .The plastic mulch could increase grain yield in some seasons ,but this practice could not sustainably improve soil fertility .Therefore ,no-till with stubble retention is the most promising system for increasing grain yield and improving the sustainable development of agriculture in the semiarid Northwest China .关键词
免耕/秸秆覆盖/地膜覆盖/土壤养分/产量/黄土高原Key words
no till/stubble retention/plastic film mulching/soil nutrients/grain yields/Loess Plateau分类
农业科技引用本文复制引用
罗珠珠,蔡立群,李玲玲,牛伊宁,张仁陟,谢军红..长期保护性耕作对黄土高原旱地土壤养分和作物产量的影响[J].干旱地区农业研究,2015,(3):171-176,6.基金项目
国家科技支撑计划（2012BAD14B03）；国家自然科学基金（31171513，31160269，41461067）；甘肃省财政厅高校基本科研业务费项目（035041049）；甘肃农业大学青年导师基金 （）
