Effects of bio-organic fertilizer on soil microbial structure and almond quality in almond orchard
Bio-organic fertilizer can not only stimulate crop growth,but also reduce the pollution of chemical fertilizer to the ecological environment.This study explored the effects of bio-organic fertilizer on soil microbial mechanism of apricot orchard and the yield and quality of kernel apricot.The experiments were conducted in 2020-2021 with 15-year-old'Youyi'kernel apricot in Xixianzi Village,Yu County,Zhangjiakou City,Hebei Province.The conventional fertilization(chemical fertilizer)treatment served as the contrast to study the effects of bio-organic fertilizer at different amounts T,(1 kg/plant),T2(2 kg/plant)and T3(3 kg/plant)on soil microorganisms,soil enzyme activity,soil physical and chemical properties,yield and quality of the almond.Compared with the control,the almond quality was improved by applying different amounts of bio-organic fertilizer.Significantly increases were found on the contents of soil organic matter,total nitrogen and available phosphorus in 0~20 cm soil layers,while the soil pH was decreased.At the same time,the activities of soil urease,invertase and alkaline phosphatase were significantly increased.Different amounts of bio-organic fertilizer increases the richness and diversity of soil fungi and bacteria,changed the structure and quantity of soil microbial community,and increased the relative abundance of beneficial bacteria such as actinomycetes.Compared with CK,the relative abundance of MND1 in T1,T2 and T3 treatments and Streptomyces in T2 treatment significantly increased,which very significantly positively correlated with yield.Compared with CK,T,and T3 treatments,Nocardioides was significantly up-regulated by T2 that showed a very significant positive correlation with the yield.Bio-organic fertilizer can improve the diversity of microbial community,increase the content of soil nutrients,and improve the yield and quality of almond by changing the structure of soil microbial community.In this experiment,the best effect was achieved when the application amount of bio-organic fertilizer was 2 kg/plant.
kernel apricotbio organic fertilizerphysical and chemical properties of soilyieldmicrobial diversity