土壤封闭除草剂在全膜双垄沟播玉米田局部减量施用效果

Application Effect of Soil Herbicides Partial Reduction in Corn Field under Whole Plastic-film Mulching on Double Ridges

研究了土壤封闭除草剂在全膜双垄沟播玉米田垄沟底、全垄沟和全地面的施用效果。结果表明,垄沟底、全垄沟和全地面施药方式下玉米出苗率依次为83.33%、83.06%和82.78%,均较CK略低,3处理间差异不显著。与CK相比,垄沟底、全垄沟和全地面施药处理玉米株高略有增高,增幅依次为0.10%、0.39%和0.95%,且玉米株高整齐度依次为17.63、15.99和16.05,三者差异不显著。垄沟底和全垄沟2种局部施药方式下玉米成穗株率略高于CK,增幅依次为1.02%和0.40%;全地面施药方式则略低,降幅为0.41%。全垄沟和全地面施药下,玉米增产效果较好,较CK分别增产10.30%和10.53%。全垄沟施药方式的除草效果较好,株防效和鲜质量防效分别为59.23%和62.41%。垄沟底除草剂施用量最少仅为全地面施药方式的1/4,玉米纯收入较CK提高6.93%。

Effect of soil herbicides in corn field of whole plastic-film mulching on double ridges at furrow bottom, full furrow and full floor were researched. The results showed that corn seedling emergence rates at furrow bottom, full furrow and full floor were 83. 33%, 83. 06% and 82.78%, respectively. Compared with the control, the corn length at furrow bottom, full furrow and full floor slightly increased, which reached 0.10%, 0.39% and 0.95%. Corn height uniformity of three application methods treatments were 17.63, 15.99 and 16.05 with no significant difference. Corn spike rate at furrow bottom and full furrow were more than the control, which increased by 1.02% and 0.40%. But corn spike rate at full floor was lower than the control, which decreased by 0.41%. Compared to the control, two application methods at full furrow and full floor could increase corn yield by 10.30% and 10.53%. Both strain control effect and fresh weight control effect at full furrow were 59.23% and 62.41%. Herbicides dose at furrow bottom was the least, which occupied one quarter of full floor. Corn net income increased by 6.93% compared with the control.