微生物菌肥对梨树根系土壤微生物的影响

Effects of Bio-Bacterial Manure on Pear Soil Microbes

摘要: 以梨树为材料，根部施用微生物菌肥对土壤微生物影响，结果表明：施用枯草芽孢杆菌、菌酵抗重茬和VT-100菌剂的土壤中细菌、纤维分解菌和放线菌的数量均出现增长现象，其中细菌数量最多，且以细菌中的氨化细菌的数量最多，放线菌居中，纤维分解菌最少；菌肥对土壤中反硝化、氨化、厌氧纤维分解菌和放线菌的生长均有促进作用，对亚硝化细菌、自生固氮菌和好氧纤维分解菌的繁殖有一定的抑制作用。四种菌肥中，菌酵抗重茬对土壤微生物数量的影响最大，改善微生物群落结构效果最显著，VT-100菌剂次之，枯草芽孢杆菌再次之。施用武夷菌的土壤里微生物的数量均较对照有不同程度的降低，不能有效改善土壤的微生物群落结构。

Abstract: The effects of root fertilization on soil microorganism were studied using the pears as materials. The results show that: the quantity of bacteria, fiber-decomposing bacteria and actinomycetes in the soil fertilized with bacillus subtilis, bacterium resistance to continuous cropping and VT-100 bacteria increased and the quantity of bacteria had the biggest rise. In addition, the number of ammonification bacteria in bacteria was the highest; bacterial manure had promoting effects for the growth of denitrification, ammoniation, anaerobic fibrinolytic bacteria and actinomycetes. This has an inhibitory effect on the breeding of nitrosation bacteria, self-contained nitrogen-fixing bacteria and cellulose decomposing bacteria. Among the four kinds of bacteria fertilizers, bacteria leaven had the greatest effect on the number of soil microorganisms and the most significant effect on improving the microbial community structure followed by VT-100 bacteria agents, and bacillus subtilis had the least effect on soil. The amount of microorganism in the soil in which Wuyi bacteria were applied decreased to different degrees, compared with the control group, and Wuyi bacteria fertilizer could not effectively improve soil microbial community structure.