缓释复合肥料对酸性菜园土壤微生物数量特征的影响

Effect of Slow Release Compound Fertilizer on Quantitative Characteristics of Microorganism in Acidic Garden Soil

采用盆栽试验研究缓释复合肥料(SRF)对酸性菜园土壤微生物数量特征的影响。两次测定(35d和45d)结果表明,在各处理中,SRF处理土壤微生物量碳(SMBC)含量、细菌和放线菌数量均为最高,其中SMBC达到显著;SRF处理微生物量氮(SMBN)含量显著高于普通复合肥(CCF)处理(分别提高25.8%和38.6%),真菌数量低于包膜缓释肥(CRF)处理,高于CCF处理;与施用普通复合肥(CCF)处理相比,SRF能够显著提高白菜产量(分别提高16.4%和13.9%),而与包膜肥料CRF处理无显著差异。

Slow/controlled release fertilizers are new type of fertilizer with optimum nutrient uptake by crops,fertilization conveniently and higher recovery of fertilizer than common chemical fertilizer.In a pot experiment,the organic material-based uncoated slow release compound fertilizer（SRF） produced by the Southwest University was adopted to study the effect of slow release compound fertilizer on quantitative characteristics of microorganism in acidic garden soil.Results showed that SRF could increase the number of SMBC,bacteria and actinomyces in rhizosphere soil on the 35th day and the 45th day compared to the other 3 treatments,and the SMBC reached the remarkable level.The soil SMBN in the SRF treatment was great higher（increased by 25.8% and 38.6%,respectively） than the CCF treatment.The soil fungus number of SRF treatment was lower than coated slow release fertilizer（CRF） but higher than CCF.SRF could significantly increase the yield of cabbage（increased by 16.4% and 13.9% in two sampling,respectively） compared with CCF,and there was no significant difference with CRF.SRF played a unique role on promoting the reproduction of acidic garden soil microorganisms and improving the structure of functional microorganisms,and then regulating the soil fertility,increasing the growth and yield of crops.SRF is a new type high efficient fertilizer,a friendly ecology coordination agent of acidic soil and an activator of keeping soil good functional microorganism population.