应用生态学报2011，Vol.22Issue(1)：99-104,6.
免耕对北方旱作玉米土壤水分及物理性质的影响
Effects of no-tillage on soil water content and physical properties of spring corn fields in semiarid region of northern China
摘要
Abstract
Field experiments were conducted in 2006-2008 to study the effects of no-tillage on the spatiotemporal dynamics of soil water content and related soil physical properties in spring com fields in Beijing region during growth season. In study period, the water storage in 0-100 cm soil layer in tillage and no-tillage treatments had the same variation trend with time and precipitation,but the water storage at different time periods and under different precipitations was 2. 7％-30. 3％ higher in no-tillage treatment than in tillage treatment. When the precipitation was relatively abundant, the increment of soil water storage was somewhat increased, but no-tillage was still worth to be popularized in the regions relatively deficit in precipitation. Under no-tillage, the average water storage in 0-100 cm soil layer during the three growth seasons in 2006-2008 was 3.4％ -12. 8％ higher than that under conventional tillage, and the increment of the water storage in 0-20 cm and 80-100 cm soil layers under no-tillage was higher than that in intermediate layer, with the highest increment reached 22.2％. No-tillage improved soil water-holding capacity and water use efficiency via decreasing soil bulk density, increasing soil porosity, and promoting the formation of soil waterstable aggregates, and thereby, promoted crop yielding. After 3 years no-tillage, the soil water use efficiency and spring corn yield were increased by 13.3％ and 16.4％, respectively, compared with those under conventional tillage.关键词
免耕/土壤水分/土壤物理性质/春玉米分类
农业科技引用本文复制引用
余海英,彭文英,马秀,张科利..免耕对北方旱作玉米土壤水分及物理性质的影响[J].应用生态学报,2011,22(1):99-104,6.基金项目
国家自然科学基金项目(40571092)和北京地区普通高等学校首都经济学科群建设项目资助. （40571092）
