土壤学报2012，Vol.49Issue(3)：592-600,9.
轮耕对宁南旱区土壤理化性状和旱地小麦产量的影响
EFFECTS OF ALTERNATE TILLAGE ON SOIL PHYSICOCHEMICAL PROPERTIES AND YIELD OF DRYLAND WHEAT IN ARID AREAS OF SOUTH NINGXIA
摘要
Abstract
To explore effects of tillage on soil physical and chemical properties and yield of winter wheat in semi-arid South Ningxia, a 3-year field experiment was carried out from 2007 to 2010. The experiment was designed to have three tillage patterns, i. e. non-tillage ( NT)/subsoiling (ST)/non-tillage ( NT), ST/NT/ST and conventional tillage (CT) as contrql and soil bulk densities, aggregates, soil nutrients and yields of winter wheat of the three treatments were determined separately. Results show that compared with CT, treatments NT/ST/NT and ST/ NT/ST significantly (p < 0. 05) decreased soil bulk density, improved soil total porosity and significantly (p < 0.05) increased the amount of 2～0. 25 mm water-aggregates. Treatment ST/NT/ST was the most effective in increasing soil organic matter (in 0～40 cm soil layer) and total N (0～20 cm) among the three; compared with CT, treatments NT/ST/NT and ST/NT/ST significantly (p <0. 05) increased alkalyzable-N (0～40 cm) , available P (0～40 cm) and available K (20～40 cm), and improved soil nutrient status. Treatments NT/ST/NT and ST/NT/ST also significantly increased wheat yield. Their three-year mean grain yield was (p <0. 05) 9. 59% and 10. 69% higher than that of the control. Obviously, treatment ST/NT/ST is better than treatment NT/ST/NT in yield raising.关键词
轮耕模式/土壤理化性状/产量/宁南旱区Key words
Alternate tillage practices/ Soil physicochemical properties/ Yield/ Arid South Ningxia分类
农业科技引用本文复制引用
侯贤清,李荣,韩清芳,贾志宽,王维,杨宝平,王俊鹏,聂俊峰,李永平..轮耕对宁南旱区土壤理化性状和旱地小麦产量的影响[J].土壤学报,2012,49(3):592-600,9.基金项目
国家"十一五"科技支撑课题(2006BAD29B03)和国家"十二五"科技支撑课题(2012BAD09B03)资助 （2006BAD29B03）
