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对苜蓿地菟丝子进行种子库调查,并研究了地乐胺对苗期菟丝子的防除效果。结果表明:菟丝子种子主要分布于苜蓿地土壤0~10 cm处,多达17 733.42万粒/hm2,20~30 cm层无种子分布;在20,25,30℃温度梯度中,菟丝子种子发芽率随温度升高呈有规律的增加;硬实率在60.0%~73.3%;菟丝子从4月份出苗到6月初生长高度为31.9 cm,平均生长速度为0.56 cm/d;以喷施地乐胺3 750 mL/hm2对苜蓿地苗期菟丝子防除效果最佳,为96.7%。
Seed banks of alfalfa dodder were surveyed and the effect of denloxamine on the control of dodder was studied. The results showed that the seed of Dodder was mainly distributed in the soil of 0-10 cm in alfalfa field with as much as 177,342,200 seeds / hm2 and 20-30 cm layer without seed distribution. In the temperature gradient of 20,25,30 ℃, the seed germination rate The rate of hardwood was 60.0% ~ 73.3%. The height of dodder from April to early June was 31.9 cm and the average growth rate was 0.56 cm / d. mL / hm2 had the best control effect on clover seedling stage, which was 96.7%.