冬小麦膜沟栽培的增产效应

Effects of furrow-film cultivation to wheat growth

干旱、冻害是限制陇东旱作冬小麦生产的主要因素。研究表明,采用膜沟方式栽培,可克服自然降水利用率低、冬小麦越冬死亡率高、土壤保墒保温效果差等弊端,使土壤含水率较露地平播提高2 44～3 17个百分点,土壤温度提高2 3～3 2℃,越冬死亡率降低11 59个百分点,冬小麦单产较常规覆膜栽培和传统露地平播栽培分别增产899 1kg/hm2和1331 25kg/hm2,增产率分别达25 9%和43 7%。

Dryness and freeze is the major factor which limits wheat growth in the east of Gansu province The research shows that the furrowfilm cultivation skill will solve the problems of utilization of natural rainfall, high death rate through winter and the preservation of soil moisture and temperature Compared with the traditional cultivation techniques, the rate of containing water of soil will increase 244～377%, the soil temperature will increase 23～32℃and the death rate through winter will decrease 1159% Compared with the normal cultivation and the traditional cultivation, the per unit of area yield will increase 8991kg/hm2 and 13325kg/hm2, thus the yield increased rates will come up to 259% and 437% for each