Microbial communities in paddy soil as influenced by nitrogen fertilization and water regimes

Plastic film mulching (PM) cultivation is an important measure to alleviate the seasonal shortage of water resources. Long-term nitrogen (N) fertilization under PM may be more conducive enhance ecological relationship between microbial communities involved in nutrient cycling. In this study, effects long-term application chemical N fertilizer (common prilled urea, PU) or no on community composition traditional flooding (TF) and were comparatively analyzed. The results demonstrated that regimes had significant impacts all soil properties except alkali-hydrolyzable N. Compared TF cultivation, increased pH available phosphorus (AP) by 1.14% 13.67% respectively decreased organic matter potassium (AK) 6.07% 8.39% respectively. Nitrogen levels AP AK, with increase 1.39 1.82 mg kg−1 PU treatment compared CK Neither nor influence richness (Chao index) diversity (Shannon index). However, played critical roles driving changes. Network analysis showed non-random co-occurrence pattern. Myrmecridium, Defluviicoccus, Emericellopsis, Pseudarthrobacter, Syntrophorhabdus keystone taxa. A higher relative abundance was observed CKPM a Myrmecridium Pseudarthrobacter PUPM treatment. Therefore, effective improve potential beneficial taxa communities. This article protected copyright. All rights reserved