Effect of Different Winter Green Manures on Composition and Mineralization of Soil Organic Nitrogen

• Published in: Shuitu baochi tongbao Vol. 43; no. 1; pp. 78 - 83
• Main Authors: Qiu Zhao, Xiuping Tian, Liping Zhou, Xuebin Dai, Xiaoguang Ning, Xinjian Zhang
• Format: Journal Article
• Language: Chinese
• Published: Science Press 01.02.2023
• Subjects: soil nitrogen mineralization; soil nitrogen supply capacity; soil organic nitrogen components; tianjin city; winter green manure
• ISSN: 1000-288X
• DOI: 10.13961/j.cnki.stbctb.2023.01.010

[Objective] The effects of different planting and overturning of winter green fertilizer on soil nitrogen supply capacity were studied in order to provide theoretical basis for improving planting technology of winter green fertilizer, increasing crop yield and maintaining soil productivity in North China. [Methods] A field experiment with a winter green manure-maize rotation was conducted at Wuqing District, Tianjin City from 2012 to 2019. The study also included indoor incubation experiments. The treatments included winter fallow, february orchid, vetch, rye, ryegrass, mixed vetch and february orchid, and mixed vetch and rye. Soil organic nitrogen content and its composition, soil organic nitrogen mineralization potential (N0), and mineralization amount were measured. The effects of winter green manure planting and incorporation on soil organic nitrogen composition and mineralization were analyzed with winter fallow used as the control. [Results] Compared with winter fallow, winter green manure significantly