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Key technologies of southern China’s low-yield paddy soil improvement and soil fertility enhancement

IARRP | Updated: 2021-07-21

Awards: Second Prize of 2016 State Scientific and Technological Progress Award

Lead researchers: Zhou Wei, Li Shuanglai, Yang Shaohai, Wu Lianghuan, Liang Guoqing, Xu Fangsen, Qin Yusheng, He Yan, Zhang Yuping, and Li Lujiu

Taking five typical low-yield paddy soils -- clay, white alkali, gleyed , acid and cold -- as its objects, the project clarified the characteristics and origins of low-yield paddy soil in southern China, and innovated key technologies in low-yield paddy soil improvement and soil fertility enhancement. It revealed the mechanisms of soil composition, aggregate stability, formation of toxic substances, and microbial diversity. The research also produced new products such as a high-efficiency straw decomposing fungi, refined organic fertilizers, bio-organic fertilizers, acid soils improvers, and special fertilizers for low-yield paddy soils, which effectively improved the physical, chemical, and biological properties of low-yield paddy soil in southern China and established an integrated technical model for improvement in low-yield paddy soil fertility.

The results of the project have been applied to 3.82 million hectares of low-yield paddy fields in 11 provinces in southern China over the past three years. As much as 16.15 billion yuan ($2.45 billion) of social and economic output value was generated, yielding a net increase in income of 13.19 billion yuan.

The research has resulted in one book and 156 papers, 51 of them SCI publications.