Effects of Pre Seedling Sealing with 960 g/L S-metolachlor EC on the Growth,Development,Physio-logical Metabolism,and Weed Control Efficiency of Adzuki Bean Seedlings
In order to determine the appropriate concentration of 960 g/L S-metolachlor EC for pre seedling seal-ing treatment of adzuki bean,under natural conditions,Liaohong 2 was taken as the research object,four treat-ments were set up with an effective dosage of 960 g/L S-metolachlor EC at 486,648,778,and 972 g/hm2,and water treatment was used as the control(CK).The effects of different dosage treatments on the growth mor-phology,photosynthetic physiological indicators,canopy structure,root characteristics,weed control effect,and yield of adzuki bean during the seedling stage were studied.The results showed that when the effective dosage of 960 g/L S-metolachlor EC was 778 g/hm2,it could significantly promote the growth and development of seedlings,significantly improving the photosynthetic traits and antioxidant enzyme activity of leaves during the seedling stage,enhance the photosynthetic and antioxidant capacity of leaves,promote the enlargement of the lower node thickness,and to some extent enhance the lodging resistance,increase in the length of the petiole at the fourth stage,thereby improve the canopy structure.The control effect on weeds in adzuki bean fields was relatively high,among which the control effect on weeds in the Poaceae family was signifi-cantly better than that on broad-leaved weeds,and the symptoms of pesticide damage in adzuki bean seedlings were the mildest.When the effective dosage of 960 g/L S-metolachlor EC is 778 g/hm2,it can in-crease the photosynthetic physiological indicators and antioxidant enzyme activity of adzuki bean leaves during the seedling stage,promote growth and dry matter ac-cumulation,have good weed control effect on adzuki bean fields,and be safe for adzuki bean seedlings,with the highest yield of adzuki bean.
Adzuki beanS-metolachlorGrowth and developmentPhysiological metabolismWeed control effectYield
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