Effect of Different Winter Green Manures on Composition and Mineralization of Soil Organic Nitrogen
Journal Title: Bulletin of Soil and Water Conservation - Year 2023, Vol 43, Issue 1
Abstract
[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 increased total organic nitrogen and acid hydrolysable organic nitrogen by 3.05%—12.36%. However, winter green manure significantly decreased the content of non-acid-decomposed organic nitrogen by 18.87—55.87 mg/kg. N0 was 189.15—245.90 mg/kg in the treatments with winter green manure (14.16%—48.41% greater than the control), and, half-life was increased by 22.57%—73.11%. After 24 weeks of indoor culture, soil organic nitrogen for all treatments was mainly composed of acid hydrolysable organic nitrogen. The mineralization amount of acid hydrolyzed total nitrogen was 3.41—20.54 mg/kg greater in the winter green manure treatments than that in the control, and the mineralization rate was 7.96%—47.31% higher than that in the control, with significant differences. [Conclusion] Winter green manure planting and incorporation significantly increased soil organic nitrogen storage and mineralizable nitrogen content, and prolonged the mineralization cycle, thereby promoting the renewal of the soil nitrogen pool, and improving soil nitrogen availability.
Authors and Affiliations
Qiu Zhao, Xiuping Tian, Liping Zhou, Xuebin Dai, Xiaoguang Ning, Xinjian Zhang
Keywords
Related Articles
- EP ID EP762465
- DOI 10.13961/j.cnki.stbctb.2023.01.010
- Views 15
- Downloads 0
Changes in Land Use Type and Ecological Environment Effect at Ten Tributaries in Inner Mongolia
[Objective] The relationship between land use change and ecological process in the ten tributaries area in Inner Mongolia was studied to reveal the relationship between human activities, land use, and ecological environm...
Evaluation of Water Resource Vulnerability in Changsha City Based on VSD and Cloud Matter-element Model, and Diagnosis of Obstacle Factors
[Objective] The vulnerability of water resources in Changsha City was evaluated based on the connotation of vulnerability and its obstacles factors were identified, in order to provide a theoretical basis for the formula...
Evaluation on Soil Conservation Function of a Mining Area Ecosystem in Semi-arid Areas
[Objective] The changes in the soil conservation function of the ecosystem of Shenfu-Dongsheng mining area from 2000 to 2020, and the present situation and existing problems of the ecosystem function in the mining area w...
Comprehensive Evaluation and Influencing Factor Analysis of Urban Ecological Water Security in Gansu Province Based on AHP-Entropy Method
[Objective] The key influencing factors of urban ecological water security in Gansu Province were comprehensively evaluated in order to provide a reference for coordinating the relationship between regional ecology, prod...
Research on Land Use Simulation and Optimization Regulation in Nanchang City Based on Low-carbon Orientation
[Objective] The changes in land use under different low-carbon scenarios were simulated, and the differences in carbon storage and carbon emissions under multiple scenarios were compared in order to provide relevant sugg...