Chemical soil disinfestation decreases soil salinisation and the presence of potential pathogens at the cost of higher nitrate leaching

作者：Peng Zhou, Xinlu Bai, Wei Xu, Haoying Wang, Lei Bao, Xiaofang Deng, Kevin Emmanuel Scriber, Zhujun Chen, Jianbin Zhou · 发表于：Agriculture Ecosystems & Environment · 年份：2024 · DOI：10.1016/j.agee.2024.108935 · 被引用次数：6 · 研究领域：Plant Disease Management Techniques、Nematode management and characterization studies、Plant Virus Research Studies

Soil degradation in greenhouse vegetable production systems due to salinisation and soil-borne diseases can be mitigated by chemical soil disinfestation (CSD). However, the comprehensive effects of CSD on soil salinisation and the presence of potential pathogens are not well realised. Therefore, the efficacy of CSD in controlling salinisation and soil-borne diseases was studied in a 3-year field experiment with tomato and melon/pepper in rotation. Treatments comprising (i) nil N (CK); (ii) conventional irrigation and fertiliser (CN); (iii) reduced synthetic N fertilisation (RN); (iv) RN with 3,4-dimethypyrazole phosphate (DMPP) (RN + DMPP); (v) a combination of manure and synthetic fertiliser (MN) and (vi) MN with straw (MNS) were applied to soils, and electrical conductivity (EC), nitrate leaching and potential pathogens were measured. Soil EC significantly decreased in 0–20 cm depth but increased in 40–200 cm depth after CSD. CSD treatment significantly accelerated nitrate leaching from 0–100 cm to 100–200 cm soil depth. Nitrate leaching from CN treatment was higher than other treatments. CSD significantly changed microbial diversity, increased network complexity and significantly decreased potential pathogens. The partial least squares path model showed that potential pathogens were positively correlated with α diversity and negatively correlated with community structure and network complexity. The relative abundance of Firmicutes , Bacillus and Deinococcus significantly i...