Effects of winter irrigation schedule on soil physicochemical properties, enzyme activities and microbial communities in cotton fields with drip irrigation under film
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DOI:10.7606/j.issn.1000-7601.2024.01.10
Key Words: winter irrigation schedule  drip\|irrigated cotton field under film  soil microbial community  soil enzymes  soil physicochemical properties
Author NameAffiliation
ZHAI Jiangrui College of Resource and Environment, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China
Key Laboratory of Saline Soil Improvement and Utilization (Saline Soil in Arid and Semi\|arid Areas), Ministry of Agriculture and Rural Affairs, Urumqi, Xinjiang 830052, China 
DING Bangxin Xinjiang Research Institute of Water Resources and Hydropower, Urumqi, Xinjiang 830049, China
College of Water Resources and Architectural Engineering, Northwest A&F UniversityYangling, Shaanxi 712100, China 
BAI Yungang Xinjiang Research Institute of Water Resources and Hydropower, Urumqi, Xinjiang 830049, China
Key Laboratory of Saline Soil Improvement and Utilization (Saline Soil in Arid and Semi\|arid Areas), Ministry of Agriculture and Rural Affairs, Urumqi, Xinjiang 830052, China 
CHAI Zhongping College of Resource and Environment, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China 
LIU Hongbo Xinjiang Research Institute of Water Resources and Hydropower, Urumqi, Xinjiang 830049, China
Key Laboratory of Saline Soil Improvement and Utilization (Saline Soil in Arid and Semi\|arid Areas), Ministry of Agriculture and Rural Affairs, Urumqi, Xinjiang 830052, China 
ZHENG Ming Xinjiang Research Institute of Water Resources and Hydropower, Urumqi, Xinjiang 830049, China
Key Laboratory of Saline Soil Improvement and Utilization (Saline Soil in Arid and Semi\|arid Areas), Ministry of Agriculture and Rural Affairs, Urumqi, Xinjiang 830052, China 
DING Yu Xinjiang Research Institute of Water Resources and Hydropower, Urumqi, Xinjiang 830049, China 
YAO Chengyang College of Resource and Environment, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China 
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Abstract:
      To investigate the impact of distinct winter irrigation strategies, we selected three winter irrigation regimes: the annual winter irrigation treatment (CK), the no winter irrigation treatment (H1), and the alternate year winter irrigation treatment (H2) for examination in cotton fields located in South Xinjiang, utilizing drip irrigation under membrane cover. By employing high\|throughput sequencing technology, we assessed and analyzed the physicochemical and biological characteristics, as well as the composition of soil microbial communities after winter irrigation. The findings revealed that: (1) There were no substantial disparities in soil total salt within the 0~20 cm soil layer across the treatments. In comparison to the CK treatment, both the H1 and H2 treatments resulted in significant reductions in urease activity (0.96%~1.35%), invertase activity (1.17%), and microbial nitrogen content (4.21%~7.03%). Nevertheless, the H2 treatment notably increased soil organic matter content (14.30%), total nitrogen content (14.29%), total phosphorus content (4.55%), and total potassium content (7.40%). Conversely, the H1 treatment brought about a reduction in soil organic matter (6.03%), total phosphorus (12.5%), and moisture content (23.08%), and increased the microbial biomass carbon to nitrogen ratio (7.37%). (2) While there were no significant variations in the abundance and diversity of bacterial communities and the abundance of fungal communities among the treatments, both H1 and H2 treatments substantially augmented fungal diversity (4.12%~4.55%) compared to the CK treatment. Additionally, H1 elevated the relative abundance of bacterial Actinobacteria, Acidobacteria, Chloroflexi and fungal Basidiomycota when contrasted with the CK treatment, while H2 exhibited higher relative abundance in bacterial Proteobacteria, Gemmatimonadetes, and Mortierellomycota than the CK. (3) The results of correlation analysis revealed that microbiomes carbon content primarily influenced the community structure of bacteria, while the diversity of fungi was influenced by the activities of invertase and urease, respectively. In scenarios where consistent annual winter irrigation cannot be guaranteed, adopting a biennial winter irrigation approach appears more favorable for preserving soil quality in drip\|irrigated cotton fields under the film.