渭北旱塬不同覆盖方式对小麦产量及农艺性状的影响

通过在渭北旱塬的不同覆盖试验,对覆盖方式与小麦产量、农艺性状之间的关系进行了研究。结果表明:(1)地膜、秸秆-地膜、渗水地膜-秸秆覆盖地面后小麦产量显著增加,以地膜全程覆盖处理小麦产量最高,可达6 971 kg/hm2,与无覆盖处理相比,不同材料和时期覆盖后小麦最高增产92.62%,最低增产23.16%;(2)地膜或者渗水地膜-秸秆全程覆盖地面,小麦产量显著高于休闲期覆盖;(3)不同材料覆盖地面后,小麦的农艺性状可以得到大幅改善,但在全程覆盖的处理中,小麦基本苗数下降。

Effect of different covering methods on wheat yield and agronomic characters in Weibei highland

This paper studied the relationships of covering methods and wheat yield, agronomic characters based on the experiment of different covering methods in Weibei highland. Results were as follows: (1) wheat yield increased significantly when the grounds were covered with common plastic film, straw and common plastic film, straw and water-permeability plastic film. The yield of wheat was highest in DQF treatment, and reached 6 971 kg/hm². Compared with no covering, under different covering matters and terms, the highest increase rate of wheat yield was 92.62% and the lowest increase rate was 23.16%; (2) Wheat yield in the treatments that grounds were covered with common plastic film, straw and water-permeability plastic film in the whole process were significantly higher than that in the fallow period; (3) Agronomic characters of wheat were improved greatly after the ground was covered with different materials, but the basi c seedling number of wheat decreased in the whole-process mulching treatments.