生物控草肥对稻田杂草的防治效果及其对稻田水的影响

A Biological Weeding Function-Organic Fertilizer's Impact on Paddy Water Layerand and Its Control Effect on Weeds

杂草危害是影响水稻生产的重要问题之一,为了探究生物控草肥的控草效果及控草机理,采用大田试验研究了酱渣-烟末-稻糠三元复配新型生物控草有机肥对水稻田杂草的防治效果;并在模拟大田环境的室内盆栽试验中检测了施用该生物控草有机肥后水层的电导率、透光率变化。结果显示,该有机肥能有效抑制稻田杂草的生长,640 kg/667m2施用量下45 d后对稗草和鸭舌草的株防效分别达到77.05%和74.12%,鲜重防效分别达到73.03%和73.68%。施用该生物控草有机肥后,稻田水层电导率明显高于普通有机肥处理组和空白对照组,水层透光率明显低于普通有机肥处理组和空白对照组,差异达到显著水平。

Weed is one of the important problems in rice production. In order to explore the biological control effect and the controlled mechanism of weeding function-organic fertilizer, the change of conductivity and transmittance on the water layer in paddy field was measured. A field experiment was carried out to confirm the effect of the weeding function-organic fertilizer weed control in rice fields. The results showed that the weeding function-organic fertilizer could effectively control weed in rice and the control efficiency to weeds was better than rice chaff. The control effect of 9 600 kg/hm2 treatment after fertilizing reached 77.05% to barnyard grass and 74.12% to sheathed monochoria herb, and weed control effect on fresh weight reached 73.03% and 73.68%, respectively. By use of the weeding function-organic fertilizer, the conductivity on water layer of paddy field were significantly higher than that of other treatment groups, the transmittances of paddy field were significantly lower than that of other treatment groups.