蚯蚓发酵液对枸杞土壤养分及微生物的影响

以2 年生‘宁杞7 号’(Lycium barbarum L.)为材料，以常规滴灌施肥为对照(CK)，设计150、300、450 kg/hm2三个施肥水平，探讨不同施肥水平对土壤养分特性及微生物组分的影响。结果表明：施用蚯蚓液体肥增加有机质37.70%~51.16%，提高碱解氮、速效磷及速效钾含量，促进放线菌与真菌的繁殖，增强过氧化氢酶与脲酶活性，微生物量碳氮最高增加量分别为69.37%、58.38%，提高产量9.41%~34.07%。各性状与其产量的灰色关联度中，以脲酶最大，其次是放线菌，真菌对产量的影响最小。300 kg/hm2蚯蚓发酵液处理效果最佳，促进有机质增加，利于速效养分的释放，促进土壤微生物生长、繁殖以及酶活性。

Effect of Earthworm Fermentation Liquor on Nutrients and Microorganism in Medlar Soil

Two years Lycium.barbarum L.‘Ningqi 7’was used as the material and an conventional drip irrigation was used for CK, three fertilization levels (150, 300 and 450 kg/hm2) were designed to study the effect of different fertilization levels on soil nutrients’characteristics and microbial components. The results showed that: the application of earthworm fermentation liquor increased soil organic matter by 37.70%-51.16%; it also increased the content of alkali-hydrolyzable nitrogen, instant phosphorus and instant potassium, improved the propagation of actinomycetes and fungi, enhanced catalase and urease activity, the highest increasing amount of microbial carbon and nitrogen was 69.37% and 58.38%, respectively, and the yield increased by 9.41%- 34.07% . Among the grey correlation between each trait and yield, the highest was urease, followed by actinomycetes, fungus had the least influence on yield. 300 kg/hm2 earthworm fermentation liquor had the best effect, which could increase organic matter content, improve the release of instant nutrients, increase microorganism growth, reproduction and enzyme activity.