Effect of raw material and application rate of biogas slurry on Cucumber growth, Fusarium wilt suppression, and soil properties

Naihui Li, Xueyan Yang, Jiaqi Liu, Yanli Liu, Qing Chen, Fengzhi Wu, Ruixue Chang
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Abstract

With the popularization and application of biogas engineering, byproduct biogas slurry has excellent application potential as organic liquid fertilizer, while its source and application rate significantly affect its effect. Irrational application of biogas slurry, can reduce crop yields and cause environmental problems such as soil salinization and diffuse source pollution. In this study, the impact of different types of biogas slurry from various materials (i.e., pig manure, chicken manure, vinasse, and kitchen waste) and their required application rates on the growth and incidence of cucumber were investigated by analyzing the dry weight of cucumber, soil chemical properties, soil extracellular enzyme activity, and the incidence of cucumber wilt disease. The results showed that the effects of the four selected types of biogas slurry on cucumber growth and disease were similar. It was shown that 3% was the most suitable application rate considering the dry weight of cucumber plants and the incidence of wilt disease. At this application rate, it was achievable to increase soil pH, soil AN, AK, Olsen P content, and enzyme activities without increasing the risk of salinization. In summary, despite different sources, biogas slurry showed the best growth promotion and disease suppression ability in 3% (v/w) application, without the risk of soil salinization.
沼液原料和施用量对黄瓜生长、枯萎病抑制及土壤性质的影响
随着沼气工程的推广应用,副产沼液作为有机液肥具有良好的应用潜力,而其来源和施用量显著影响其效果。沼液的不合理施用,不仅会降低作物产量,还会造成土壤盐碱化、源污染扩散等环境问题。本研究通过分析黄瓜干重、土壤化学性质、土壤胞外酶活性和黄瓜枯萎病发病率,探讨了不同材料(猪粪、鸡粪、酒糟、厨余)不同类型沼液及其需要量对黄瓜生长和发病率的影响。结果表明,4种沼液对黄瓜生长和病害的影响相似。结果表明,考虑到黄瓜植株的干重和黄瓜枯萎病的发病率,3%的施用量是最适宜的。在此施用量下,在不增加盐渍化风险的情况下,可以提高土壤pH、土壤AN、AK、Olsen P含量和酶活性。综上所述,在不同来源条件下,施用3% (v/w)沼液促进生长和抑制病害的效果最好,且无土壤盐碱化风险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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