绥化市大豆田主要杂草发生及防除对策研究

采用路线踏查与定点观察相结合方法对绥化市大豆田主要杂草种类及发生规律进行调查,并在此基础上对杂草的防除技术进行研究,结果显示:绥化市大豆田杂草共有15科24种,并且杂草发生期集中,高峰期的出草量占总出草量的85%左右.化学防除技术研究显示土壤封闭、茎叶处理所用不同除草剂单混效果不同.并对化学除草的注意事项进行说明,应根据气候条件、土壤墒情、大豆发育进度、杂草大小等灵活运用防除对策.

Occurrence and control of weeds on soybean field in SuiHua city

Adopting the route- checking combined with fixed - point observation, the main species of weeds and occurring regulation in soybean farmland were investigated in SuiHua city. Based on the investigation, approaches to prevent and control the weeds were suggested. The result showed that fifteen famihes with twenty- four genera of weeds in soy- bean farmland appeared in SuiHua city. Among weeds, Echinochloa crusgalli, Chenopodium aristatum, Cormnelina communis, Acalypha anstralis were predominant genera. The time of weed appeared in soybean farmland was concentrated. It has one month for weeds to emerge after seeding. The peak of weed emergence was fifteen to thirty - five days after seeding. In this period, eightyfive percent of weeds appeared. Echinochloa crusgalli and other gramineous weeds grew quickly, which was also predominant genera later. The chemical control technique showed the different effect of single and mixed herbicide was used in the treatment of the closing soil, leaves and stems. The article also explained how to use chemical herbicide correctly, the right method should be applied according to the climate condition, soil condition, the progress of soybean growth and the dimension of weeds etc.