微生物有机肥复苏枯萎榆树的实验研究

为探讨施用微生物有机肥复苏枯萎2年的榆树（树龄6年）效果，设置不施肥(B1)、微生物有机肥(T1)、普通有机肥(T2)、化肥(T3)4个施肥处理，4个施肥处理前采用普通生态肥（主要成分为作物秸秆）调制土壤，确保土壤含有等量的N、P、K成分。检测施肥后第0、7、14、21、28、40天土样中的微生物数量，并观察枯树的生长状况。结果显示，施用微生物有机肥可明显提高土壤微生物的数量，随着时间的延长，微生物数量进一步增加，最高可达100亿cfu/g，数量巨大的功能性微生物加强了植物对碳源的利用率，且微生物有机肥中的复合菌株和生物生长因子对青枯病、根腐病、枯萎病、疫病等几种主要土传病害有良好地预防和改善，对榆树的复苏有显著的效果。

Experimental Research on Recovering Wilted Elm by Microbial Organic Fertilizer

To explore the effect of recovery wilted elm by microbial organic fertilizer, 4 fertilization treatments were setting up, no fertilizer (B1), microbial organic fertilizer (T1), conventional organic fertilizer (T2), chemical fertilizer (T3). To guarantee the equal contents of N, P, K in soil, conventional ecological fertilizer (main component is crop straw) was used to modulate soil before formal 4 fertilization treatment experiment. Soil microbial population was detected at the 0th, 7th, 14th, 21st, 28th and 40th day, respectively from commencement of the experiment, growth condition of wilted plant was observed as well. The results showed, microbial organic fertilizer could increase microbial population in soil obviously, the microbial population was further increased with the prolonging of reaction time, the maximal quantity was 100×109 cfu/g. Enormous functional microorganism enhanced carbon conversion ratio of plant, complex strains and growth factors of microbial organic fertilizer could prevent and improve typical soil-borne diseases, such as bacterial wilt, root rot, fusarium wilt and phytophthora blight, as well as had significant effect of recovery wilted elm.