草业学报2012，Vol.21Issue(6)：75-81,7.
不同耕作措施下旱作春小麦叶水势动态及其对环境因子的响应
Dynamics of leaf water potential of spring wheat and responses to environmental factors under different tillage practices on dry land
摘要
Abstract
Based on a long-term experiment conducted in the Loess Plateau, the dynamics of leaf water potential of rain watered spring wheat, and the relationships between leaf water potential and environmental factors under different tillage patterns were studied. During the whole growing season, leaf water potential was highest in the early morning and lowest at 12:00 to 14:00, after which it gradually rose again. The daily average value of leaf water potential under no-till cultivation with straw mulching was higher than those under other treatments. The order of leaf relative water content at different growth stages was: heading>jointing>flowering> filling stage, and leaf relative water content under no-till with straw mulching was significantly higher than that under conventional tillage. The dynamics of water saturation deficient showed the opposite trends to that of relative water content. Leaf water potential under different conservation tillage patterns had significant correlations with soil water content, air temperature, solar radiation, relative air humidity and air water potential. Air water potential had the greatest effect on the dynamics of leaf water potential in these areas, followed by relative air humidity, air temperature and solar radiation.关键词
耕作措施/叶水势/环境因子/春小麦Key words
tillage practice/ leaf water potential/ environmental factor/ spring wheat {Triticum aestivum)分类
农业科技引用本文复制引用
李杰,蔡立群,张鸣,张仁陟..不同耕作措施下旱作春小麦叶水势动态及其对环境因子的响应[J].草业学报,2012,21(6):75-81,7.基金项目
国家自然科学基金项目(31160269,31171513,40771132,31060178)和甘肃省高等学校研究生导师科研项目(1002-09)资助. （31160269,31171513,40771132,31060178）
