文献类型： 外文期刊

作者： Xie, Yue ¹ ; Qiang, Xiaoyu ¹ ; Lu, Yili ² ; Xu, Henkang ⁴ ;

作者机构： 1.China Agr Univ, Coll Hort, Dept Vegetables, Beijing Key Lab Growth & Dev Regulat Protected Veg, Beijing 100193, Peoples R China

2.China Agr Univ, Coll Land Sci & Technol, Beijing 100193, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Arable Land Conservat North China, Beijing 100193, Peoples R China

4.Beijing Acad Agr & Forestry Sci BAAFS, Inst Grassland Flowers & Ecol, Beijing 100097, Peoples R China

关键词： Catch crop; Chinese cabbage; Greenhouse production; Soil nitrogen pools; Summer fallow

期刊名称：ITALIAN JOURNAL OF AGRONOMY （ 影响因子：2.1； 五年影响因子：2.3 ）

ISSN： 1125-4718

年卷期： 2025 年 20 卷 2 期

页码：

收录情况： SCI

摘要： Summer catch crops can reduce soil soluble nitrogen (N) during the summer fallow period in Chinese greenhouse vegetable production. However, the influence of growing fast-growing leafy vegetables as catch crops on soil organic N pools remain insufficiently understood. The aim of this study was to investigate the effects of growing Chinese cabbage (Kuaicai) on soil N pools in the top 0.3 m soil layer during a one-month fallow period in two years. Treatments included Kuaicai cultivation and a fallow treatment for comparison. Results show that soil soluble N pools and non-hydrolysable N (NHN) in the top 0.3 m soil layer were increased during the summer fallow period in the fallow treatment. Kuaicai accumulated 40-114 kg N ha-1 each year, improving N use efficiency by 9.2-26.3%. Growing Kuaicai with drip irrigation to 90% field capacity reduced soil total N (TN) by 12-16% and total soluble N (TSN) by 37-83%. Growing Kuaicai reduced labile N fractions, specifically ammonium N (AN) in the top 0.2 m soil layer by 13-26% and amino acid N (AAN) in the 0.1-0.2 m soil layer by 5-17%. The partial least squares path modelling (a goodness of fit = 0.67) revealed that fallow period management had direct effects on TSN, NHN, and TN, and an indirect effect on labile organic N fractions. The AN and AAN were direct contributors to TSN. These findings suggest that growing Kuaicai as a catch crop is an effective strategy for reducing soluble N pools and labile organic N fractions, thereby lowering the risk of N loss in the next growing season.