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Psychrophilic Microbial Consortium Addition Promotes Degradation of Returned Rice Straw at Tillering Stage

文献类型： 外文期刊

作者： Liu, Jie 1 ; Xiao, Likun 1 ; Guan, Fachun 2 ; Cai, Jinling 1 ;

作者机构： 1.Tianjin Univ Sci & Technol, Coll Chem Engn & Mat Sci, Tianjin Key Lab Brine Chem Engn & Resource Ecoutil, Tianjin 300457, Peoples R China

2.Jilin Acad Agr Sci, Changchun 130033, Peoples R China

关键词： Straw returning; Psychrophilic microbial consortium; Soil nutrient elements; Soil enzyme; Rice; Agronomic characteristics

期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.9； 五年影响因子：3.9 ）

ISSN： 0718-9508

年卷期： 2023 年

页码：

收录情况： SCI

摘要： To improve the use of straw resources, rice straw was returned directly to the field and a psychrophilic microbial consortium was applied to accelerate degradation of the returned straw. A straw returning experiment was conducted in Jilin Province, China, during winter. Three experimental treatments were applied. Rice straw returned by deep tillage (SM); rice straw returned by deep tillage accompanied by a psychrophilic microbial consortium; and rice straw directly sprinkled in the field (control, CK). The timing and field management of the three treatments were the same. Soil characteristics and rice growth in all treatments were studied at the following tillering stage of rice. The SMJ treatment increased soil nutrients. Compared with CK, the SM and SMJ treatments significantly increased soil organic matter (SOM, 8.57% and 38.93%), total nitrogen (TN, 11.64% and 24.66%), alkali-hydrolyzed nitrogen (AN, 8.49% and 33.81%), available potassium (AK, 14.71% and 86.47%), and available phosphorus (AP, 10.92% and 18.16%), respectively. In particular, addition of the psychrophilic microbial consortium in SMJ treatment significantly increased the SOM content compared to SM (by 38.9%) and CK (by 27.97%). Furthermore, urease activity in the SMJ treatment was two and three times that of the SM and CK treatments, respectively. Specifically, the number of effective tillers in SMJ treatment was twice that for the CK treatment at tillering stage. The combination of the psychrophilic microbial consortium with deep tillage effectively degraded rice straw and increased soil fertility and tillering. The addition of the psychrophilic microbial consortium increased the primary nutrients, intermediate nutrients, soil enzyme activities, and Nitrospirota richness. These results suggest that applying rice straw deep tillage with a psychrophilic microbial consortium is an efficient and inexpensive approach to improve soil fertility and crop productivity.

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