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Short-term changes in chemical and microbial characteristics of paddy soil in response to consecutive addition of organic ameliorants in a rice-rice-vegetable rotation system

文献类型： 外文期刊

作者： Yi, Qiong 2 ; Fan, Xiaolin 1 ; Tang, Shuanhu 2 ; Huang, Qiaoyi 2 ; Moustafa-Farag, Mohamed 2 ; Zhang, Mu 2 ; Pang, Yuw 1 ;

作者机构： 1.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China

2.Guangdong Acad Agr Sci, Key Lab Plant Nutr & Fertilizer South Reg, Inst Agr Resources & Environm, Minist Agr, Guangzhou 510640, Guangdong, Peoples R China

3.Agr Res Ctr, Hort Res Inst, Giza, Egypt

关键词： Rice-rice-vegetable; combination of rice straw and organic ameliorants; biochar; organic fertilizer; peanut bran

期刊名称：SOIL SCIENCE AND PLANT NUTRITION （ 2020影响因子：2.389； 五年影响因子：2.525 ）

ISSN： 0038-0768

年卷期： 2019 年 65 卷 4 期

页码：

收录情况： SCI

摘要： With regard of the problems of soil acidification and soil degradation caused by high intensive planting in south China, a 2-year pot experiment consisting of six harvests under a rice-rice-vegetable rotation cropping system was conducted to assess the effects of NPK+ rice straw (RS) and combined application of RS with peanut bran, biochar, and organic fertilizer on soil chemical and microbial characteristics in paddy soil. The control treatment received chemical fertilizer alone. Results showed that RS and the combination of RS with organic ameliorants, especially NPK+ rice straw + biochar (RSBC) treatment led to the greatest improvement of soil pH, soil organic carbon, microbial biomass carbon, and total nitrogen (TN) content, and urease (UE), acid phosphatase (ACP) and catalase (CAT) activities concurrently without yield sacrificing, which inferred that RSBC treatment could be an effective measure to alleviate soil acidification, boost carbon sequestration and nutrients content as well as soil enzyme activities in rice-rice-vegetable rotation system. Besides, Pearson's correlation analysis showed that soil mineral nitrogen (N-min) content was negatively related to pH, and the available potassium (AK) content was positively related to UE and CAT activity but negatively related to ACP activity. Canonical correspondence analysis demonstrated the N-min and AK explained 27.2% and 13.7% of the variation in microbial species, respectively. Therefore, it is believed that soil N-min and AK content could be the primary factors of soil microbial properties under the rice-rice-vegetable rotation system.

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