荞麦秸秆粉还田对杂草及苦荞产量的影响

Effect of Buckwheat-Straw Powder Returning to Field on Weeds and Tartary Yield

为探讨荞麦秸秆还田条件下荞麦田杂草治理技术,通过2个不同种植区田间小区试验,研究不同秸秆还田量对荞麦田杂草抑制及苦荞产量的影响。结果表明,不同秸秆还田量对杂草抑制及苦荞产量的影响存在显著性差异。当荞麦秸秆还田量从1 200 kg/hm2增至4 800 kg/hm2时,禾本草及阔叶草的株数及鲜质量较对照明显下降,防除效应明显增高。大山包种植区秸秆还田量为4 800 kg/hm2、安宁种植区秸秆还田量为3 600 kg/hm2时杂草防效、苦荞的农艺性状及产量整体上大于其他处理,最高产量分别达到1 714.0、1 262.3 kg/hm2,比对照分别增加74.3%、41.0%。综上所述,在大山包种植区4 800 kg/hm2的秸秆还田量及安宁种植区3 600 kg/hm2的秸秆还田量具有良好的杂草抑制效应及苦荞增产效应。

To explore the weed control technology based on the return of different amounts buckwheat-straw powder into buckwheat fieldsfield plot tests were established in two different buckwheat planting areas. The amount of straw returned tothe field significantly inhibited weed inhibition and affected yield of tartary buckwheat. Both grass and broadleaf weed density and fresh weight were significantly reduced,while weed control significantly increased as the amount of buckwheat-straw returning to field increased from 1 200 kg/hm2 to 4 800 kg/hm2. When the amount of buckwheat-strawreturned to the field was 4 800 kg/hm2 at Dashanbao and 3 600 kg/hm2 at Anning planting areas,the weed control effect,agronomic traits and the yield of tartary buckwheat werehigher than with the other treatments,indicating that straw return provides adequate weed suppression and increases the tartary buckwheat yield. The maximum yield respectively reached up to 1 714. 0,1 262. 3 kg/hm2,having an increase of 74. 3%,41. 0%,respectively,compared to the control.