Application of Microbial Fertilizer on Sweet Potato Qinshu No.5
In 2022,the main sweet potato variety Qinshu NO.5 was used as material in Ansai District of Yan'an City.The effects of different fertilization methods(traditional chemical fertilizer,combined application of chemical fertilizer and mi-crobial bacterial fertilizer and single application of microbial bacterial fertilizer)on the yield,quality and economic benefit of sweet potato were studied,so as to provide reference for local sweet potato quality improvement and efficiency cultiva-tion.The results showed that the effect of microbial fertilizer on increasing yield was obvious,and the number of sweet pota-to per plant was significantly higher than that of control,but not significantly different from that of 1200 kg/hm2 alone,and the quality of sweet potato treated with microbial fertilizer was significantly higher than that of other treatments,and the ap-plication of microbial fertilizer had no significant effect on the commodity rate and dry matter rate of sweet potato.The com-bined application of chemical fertilizer and biological bacterial fertilizer and the single application of microbial fertilizer sig-nificantly increased the crude starch and reducing sugar content of Qinshu No.5,the contents of protein and soluble sugar were significantly increased under the conditions of 40%reduction of traditional fertilizer+900 kg/hm2 fertilizer and single application of biologic fertilizer.The economic benefit of single application of 1 200 kg/hm2 microbial fertilizer was the hi-ghest.According to the comprehensive analysis,under the experimental conditions,the single application of 1 200 kg/hm2 microbial fertilizer is more suitable for the production of Qinshu No.5.
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