Mechanisms by which chloropicrin fumigation promotes soil potassium conversion and absorption

Fumigation of soil using chloropicrin has been proven to significantly affect nutrient cycling, but the mechanism by which potassium conversion and plant uptake is promoted remains unclear. In this study, we conducted a fumigation experiment investigate effects on post-fumigation (days 7–70), its mechanisms, tomatos were planted in fumigated non-fumigated soils enable further comparisons. Results showed that content rapidly available decreased 16–24% 17–23% at day 28 respectively, when tomato was chloropicrin-fumigated compared soils. The higher than (30.3 vs. 21.9 mg g −1 dry weight). Chloropicrin resulted significant change bacterial fungal community structures, trigged long-term (at least 70-day) decrease microbial diversity. Network analysis changed co-occurrence patterns decreasing total links, nodes, average degree, increasing degree. caused changes relative abundance Bacillus species, are involved dissolution. Structural equation model (SEM) suggested with enhanced contribution growth reduced communities. Together, results our study help understanding crop yield enhancement fumigation.