大豆科学2011，Vol.30Issue(1)：56-61,6.
保护性耕作对黑土农田土壤水热及作物产量的影响
Effect of Conservation Tillage on Soil Temperature, Water Content and Yield in Arable Black Soil
摘要
Abstract
Conservation tillage is an effective technique for increasing crop yield in arid areas. The objective of this field experiment was to compare the effects of three different tillage systems (no tillage, reduced tillage and conventional tillage) on soil temperature, soil water content and crop yield in arable black soil region of Hailun County, Heilongjiang province from 2004 to 2009. The result showed that no-tillage with mulch (NT) and reduced tillage (RT) under soybean and corn rotation system, the soybean yield in NT and RT averagely increased by 10％ and 3.7％ in 2004 and 2008, respeltively;decreased by 4.6％ in 2006, and increased by 3.7％ during three years. The yields were significantly different between NT, RT and CT ( P ＜ 0. 05 ) in 2004 and 2008. Moreover, the corn grain yields reduced under NT and RT, separately. The yield under NT was significantly different ( P ＜ 0.05 ) compared with other tillage systems. Furthermore, NT could increase soil water content in the topsoil of 0 ～ 15 cm and the soil water content in the furrow were higher than ridge. During the sowing period the soil surface temperature was increased in the order of NT ＜ RT ＜ CT during three years and the NT soil temperature was 1.62℃ and 2.76℃ lower than that of RT and CT, respectively. The lower soil temperature under NT had no obvious effect on soybean emergence; however, it had evidently impact on corn emergence and the growth in early periods.关键词
保护性耕作/土壤水分/土壤温度/产量Key words
Conservational tillage/ Soil water content/ Soil temperature/ Yield分类
农业科技引用本文复制引用
刘爽,张兴义..保护性耕作对黑土农田土壤水热及作物产量的影响[J].大豆科学,2011,30(1):56-61,6.基金项目
国家高技术研究发展计划(2008AA10Z212)资助项目 （2008AA10Z212）
黑龙江省杰出青年基金(JC200718)资助项目. （JC200718）
