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| Effects of organic material returning on microbial characteristics in paddy soil |
| Received:February 04, 2025 |
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| KeyWord:organic material returning to field;straw;biochar;paddy soil;microbial characteristics |
| Author Name | Affiliation | E-mail | | LU Congxu | Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs
Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation
Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
College of Resources and Environment, Shanxi Agricultural University, Taigu 030800, China | | | XU Jianming | Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs
Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation
Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China | | | WEI Lan | Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs
Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation
Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China | | | HUANG Yufen | Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs
Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation
Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China | | | LIANG Jiecong | Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs
Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation
Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China | | | LIANG Kaiming | Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China | | | LIU Zhongzhen | Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs
Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation
Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China | | | ZHENG Xiaodong | Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs
Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation
Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China | zxdmrhq@foxmail.com |
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| Abstract: |
| The phospholipid fatty acids（PLFA）fingerprint was used to determine the response of microbial characteristics and related mechanisms to combined application of fertilizer and organic materials in paddy soil from southern China. The combined application of chemical fertilizer and organic materials（straw and biochar）on microbial group quantity, community composition and microbial network property in early and late rice paddy soils were studied in a field trail. The results showed that amount of gram-positive bacteria, actinomycetes, and gram-negative bacteria with biochar addition decreased by 53.67%, 24.88%, and 18.47% separately relative to control and straw treatment in early rice paddy soil, and the ratios of gram-positive bacteria to gram-negative bacteria and bacteria to fungi decreased correspondingly. While no significant differences of microbial group contents and community composition were found for each treatment in late rice paddy soil, mainly caused by the conversion of proper condition in early rice paddy soil to drought stress condition in late rice paddy soil. Compared to early rice paddy soil, the contents of PLFA of gram-positive bacteria, actinomycetes, and gram-negative bacteria for control treatment decreased by 50.42%, 15.43%, 11.10% and those for straw treatment decreased by 54.17%, 18.13%, 18.44% separately, and the complexity of microbial network relation obviously decreased. The microbial network complexity with biochar addition was higher in late rice paddy soil than in early rice paddy soil, and the network relation changed from competition to cooperation. The stoichiometric ratio of available nutrients and precipitation were the key factors influencing microbial characteristics. |
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