Effect of dazomet soil disinfestation combined with planting density on weed control,light intensity and yield in rape field
Pesticide combined with agronomic practices to control weed can effectively reduce the use of chemical herbicides and realize the integrated management of weed.The objective of our research is to evaluate the effect of soil disinfestation combined planting density on weed control in rape field,and the impact on nitrogen,phosphorus,potassium and water consumption after weed control.The results indicated that the efficacy of weed control was remarkable by soil disinfestation combined with planting density in rape field.The control efficacy on Avena fatua and Sonchus oleraceus was ranged from 89.8％to 100.0％.After weed control,the consumption of nitrogen,phosphorus,potassium and water of weeds in the field was reduced by more than 85％,and the water,nutrients conditions and light intensity in the field were effectively improved.The rapeseed yield was ranged 3 155.0 to 4 920.5 kg/hm2 after treatment with soil disinfestation combined with planting density,which increased by 13.3％-76.8％compared to untreated control.Moreover,the yield income increased by 1 857.3-10 684.8 Yuan/hm2.Our research shows that soil disinfestation combined with planting density has good control effect on weeds in rape field,and moderately increasing the planting density of rape can not only ensure the prevention of weeds,but also ensure the rape yield.
dazometplanting densityweed control effectnutrient contentrapeseed yield
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