Effects of Microbial Agents on Maize Yield,Soil Nutrients,Photosynthetic Characteristics,Pest and Disease
Four maize standard plots were selected as the sample plots,and were divided into control group CK(without any fertilizer),Z1(conventional fertilizer),Z2(fertilizer+sitori microbial agent)and Z3(fertilizer+polyglutamate microbial agent),respectively,to analyze the effects of different microbial agents on maize yield maize yield,soil nutrients,photosynthetic characteristics and pest and disease control.The results showed that in terms of corn yield,row number,1000-grain weight and yield after increased application were higher than those in CK group.The Z3 treatment had the best performance.In terms of soil nutrients,the organic matter content in groups Z1,Z2 and Z3 was higher than that in group CK at jointing stage,milking stage and maturity stage,and the organic matter content in group Z3 was the highest.The soil alkali-hydrolytic nitrogen content in the treated group was higher than that in CK group,and the overall performance was Z3＞Z2＞Z1＞CK.The soil available phosphorus content of Z3,Z2 and Z1 increased by 1.78,1.42,1.15 times,1.76,1.48,1.19 times and 2.46,1.95,1.47 times,respectively,compared with CK treatment at jointing stage,milk ripening stage and maturity stage.The soil available potassium content of Z3 treatment was 1.30,1.17,1.07 times,and 1.28,1.19,1.07 times,and 1.39,1.19,1.09 times of Z2,Z1 and CK,respectively,at jointing stage,milk ripening stage and maturity stage.The net photosynthetic rate and transpiration rate reached the peak at milk maturity stage,and the photosynthetic rate of Z3 treatment was higher than that of the other treatments.The transpiration rate of Z3 treatment was 1.51,1.34,1.24 times of that of Z2,Z1 and CK groups at milk maturity,respectively.In terms of diseases and pests,the disease rate of Z1,Z2 and Z3 treatments was lower than that of CK.In conclusion,increased application of microbial agents can increase corn yield,improve soil nutrients,enhance photosynthetic characteristics,and reduce pests and diseases,among which the treatment with chemical fertilizer+polyglutamate microbial agent has obvious advantages,and can be popularized and applied in corn planting.
Microbial agentMaize yieldSoil nutrientPhotosynthetic characteristicPest and disease control
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