Effects of one-time side deep application of slow-release fertilizer on winter wheat growth and soil bacterial community structure
In order to study the effects of one-time side deep application of slow-release fertilizer on winter wheat growth and soil bacte-rial community structure.three treatments were set up,including no-fertilizer(CTR),conventional fertilization(FP)and one-time side deep application of slow-release fertilizer(ZS).The wheat yield and yield composition,N,P,K absorption and soil bacterial community structure characteristics were studied.The results showed that compared with CTR treatment,the yields of fertilizer treat-ments(FP,ZS)were significantly increased.Compared with FP treatment,the number of panicle and grain yield(8283.75 kg·hm-2)increased significantly under ZS treatment,while the number of panicle and 1000-grain weight decreased.In addition,the yield of ZS treated straw decreased,and the ratio of grain to grass increased.Compared with FP treatment,ZS treatment significantly increased grain N,P,K accumulation,whole plant P and K accumulation,and decreased whole plant N accumulation.At the same time,the yield index of N,P and K,the contribution rate of fertilizer and nitrogen partial productivity were significantly in-creased.Compared with FP treatment,the application of slow-release fertilizer had no significant effect on the diversity and abundance of soil bacteria,and most of the bacteria with significant differences among different treatments belonged to non-dominant bacteria.In conclusion,compared with conventional fertilization,one-time side deep application of slow-release fertilizer on winter wheat increased grain number per spike,grain yield,grain N,P,K accumulation,the utilization rate of fertilizer,and maintained the stability of soil bacterial community.
one-offside deep fertilizationslow-release fertilizerwinter wheatsoil bacterial community structure
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