不同保护性耕作方式对旱地玉米的增产效应

通过16种不同保护性耕作方式对旱地玉米产量影响的试验,结果表明:秋深耕 秋施肥 春免耕(A1)和秋浅耕 秋施肥 春免耕(A2)两种耕作方法,明显优于其他耕作方法,每公顷玉米增产为1009.5～1182kg;玉米整秆覆盖(B2)、玉米碎秆覆盖(B3)和地膜覆盖(B1)3种覆盖之间无显著差异,但都比不覆盖(B4)增产显著,每公顷玉米增产为1031.7～1281.7kg。16个处理中,A1B3(秋深耕 秋施肥 春免耕) 玉米碎秆覆盖处理的玉米产量最高达6508.5kg/hm2,是干旱地区可选择的保墒蓄水增产耕作栽培形式。

Effect of Conservation Tillages on the Yield of Corn in Dry Land

The effect of 16 different conservation tillages of dry land on the corn yield was studied in this paper.The results showed that the two methods of A1(deep-plough to subsoil in autumn fertilize in autumn without-till in spring) and A2(shallow-plough to subsoil in autumn fertilize in autumn without-till in spring) were better than others and increased corn yield with 1 009.5 kg to 1 182 kg per ha when compared with A4.There was no significant difference among the three mulching-modes to soil of stalk-cover(B2),broken stalk-cover(B3) and plastic film-cover(B1),while the three methods of Al,A2 and A3 brought out higher corn yield than un-cover(B4),with 1031.7 to 1 281.7 kg per ha.Among all 16 control of tillage management.and mulching-modes,the corn yield of A1B3 was the highest and as high as 6 508.5 kg per ha.The method of A1B3 was the effective cultivation method on water storage and high production in dry land.