【摘要】 对不同覆盖模式旱地冬小麦土壤温度的分析表明,覆盖栽培对提高土壤温度具有明显的作用,平覆地膜穴播栽培和垄沟栽培能够有效地提高旱地冬小麦全生育期积温和越冬期前的土壤温度,表层土壤增温幅度最大,随着土壤深度增加增温幅度逐渐减少,中午(14:00时)增温幅度大于早(8:00时)、晚(18:00时),从而有利于形成壮苗和冬前有效分蘖。秸秆覆盖栽培在苗期和分蘖期虽有一定的增温效果,但越冬期后土壤温度明显降低,抑制了春季有效分蘖的形成和拔节孕穗期的生长发育。更多还原

【Abstract】 Soil temperature under different mulching modules of winter wheat in dryland was analyzed.The results showed that mulching cultivation had significant effect on increasing soil temperature,film mulching and hole sowing and furrow-film mulching cultivation remarkably increase soil accumulated temperatures in whole growth period and average soil temperatures before overwintering stage,meanwhile ranges of soil temperature increasing was greatest at surface soil,then with the increasing of soil depth,the ranges reduces.The ranges of soil temperature increasing at 2:00PM were greater than at 8:00 AM and 18:00 PM.and that was advantage to formatting strong seedling and effective tiller.Straw mulching cultivation has effect of increasing soil temperature in seedling stage and tillering stage,but obviously reduces soil temperature after overwintering stage,and that restrain to form spring tiller and growth in jointing-booting stage.更多还原