不同耕作模式对玉米田杂草发生规律的影响

Influence on Weed Occurring Law of Different Cultivate Modes in Corn Field

在免耕、旋耕和翻耕玉米田试验区调查杂草种类和出苗数量,并在玉米生长中后期调查杂草种类、株数和鲜重。结果表明,不同耕作模式玉米田杂草发生规律有明显差异。免耕、旋耕和翻耕玉米田禾本科杂草高峰期都在播种后5周发生;阔叶杂草发生高峰期不同,免耕田为播种后1周,旋耕和翻耕田均在播种后2周。杂草种类不同,玉米生长中后期,免耕田有8种杂草,旋耕田有10种,翻耕田有12种;杂草发生总量不同,免耕田杂草总量最多,旋耕田居中,翻耕田最少;杂草单株鲜重不同,免耕田杂草单株鲜重最低,旋耕田居中,翻耕田最高。

The trial areas were set up in no-tillage,rotary tillage and turned over tillage corn field,designated time and spotted to investigate the number of emergence and weed species.While investigate the species,plants and fresh weight of weeds in corn growth of medium-term and the later.Survey results showed that there were significant differences on weed occurring law of different cultivate modes in corn field.The peak occurrence of grass weeds was the same which was in five weeks after sowing in no-tillage,rot...