| 耕作方式对紫色水稻土颗粒态氮的影响 |
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| 引用本文： | 刘志祥,郝庆菊,江长胜,祝滔. 耕作方式对紫色水稻土颗粒态氮的影响[J]. 水土保持学报, 2011, 25(6): 110-113,175 |
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| 作者姓名： | 刘志祥 郝庆菊 江长胜 祝滔 |
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| 作者单位： | 1. 西南大学三峡库区生态环境教育部重点实验室,西南大学资源环境学院,重庆,400715
2. 西南大学三峡库区生态环境教育部重点实验室,西南大学资源环境学院,重庆,400715;重庆市三峡库区农业面源污染控制工程技术研究中心,重庆,400716 |
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| 基金项目： | 国家自然科学基金项目(40975095,41005069); 西南大学生态学重点学科“211工程”三期建设项目;西南大学大型仪器开放基金(201028,201030) |
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| 摘 要： | 土壤颗粒态氮作为土壤有机氮中的非稳定性部分,对土壤中氮的平衡有着重要的影响,对作物的生长及增产增收也有着重要意义.试验以西南大学农业部重庆紫色土生态环境重点野外科学观测试验站内于1989年设立的长期免耕试验田为研究对象,研究冬水田平作、水旱轮作、垄作免耕和垄作翻耕等耕作方式对土壤颗粒态氮的影响.结果表明,不同耕作方式下土壤全氮及颗粒态氮含量均具有明显的垂直分布特征,由上到下含量逐渐降低.在0-60 cm的土壤深度内,土壤全氮平均含量依次为垄作免耕(1.53g/kg)>冬水田平作(1.50 g/kg)>垄作翻耕(1.31 g/kg)>水旱轮作(1.16 g/kg);颗粒态氮平均含量依次为冬水田平作(0.55 g/kg)>垄作免耕(0.46 g/kg)>垄作翻耕(0.40 g/kg)>水旱轮作(0.35 g/kg).免耕能够增加土壤全氮含量,但无助于颗粒态氮含量的增加.不同耕作方式下的颗粒态土碳氮比大于全土碳氮比,表明颗粒态土壤有机质易被微生物分解,是土壤营养物质的重要来源.
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| 关 键 词： | 耕作方式 全氮 颗粒态氮 紫色水稻土 |
Effect of Tillage Systems on Soil Particulate Organic Nitrogen in a Purple Paddy Soil |
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| LIU Zhi-xiang,HAO Qing-ju,JIANG Chang-sheng,ZHU Tao,College of Resources,Environment,Southwest University,Chongqing,.Chongqing Engineering Research Center for Agricultural Non-point Source Pollution Control in the Three Gorges Reservoir Are,Chongqing. Effect of Tillage Systems on Soil Particulate Organic Nitrogen in a Purple Paddy Soil[J]. Journal of Soil and Water Conservation, 2011, 25(6): 110-113,175 |
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| Authors: | LIU Zhi-xiang HAO Qing-ju JIANG Chang-sheng ZHU Tao College of Resources Environment Southwest University Chongqing .Chongqing Engineering Research Center for Agricultural Non-point Source Pollution Control in the Three Gorges Reservoir Are Chongqing |
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| Affiliation: | LIU Zhi-xiang1,HAO Qing-ju1,2,JIANG Chang-sheng1,ZHU Tao1(1.Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education),College of Resources and Environment,Southwest University,Chongqing 400715,2.Chongqing Engineering Research Center for Agricultural Non-point Source Pollution Control in the Three Gorges Reservoir Area,Chongqing 400716) |
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| Abstract: | Soil particulate organic nitrogen as the instable part of soil organic nitrogen,playing an important role in the nitrogen balance,and is of great significance in the growth of plant and the increase of crop yield.In this paper four tillage treatments including conventional tillage with rice only system(DP),conventional tillage with rotation of rice and rape system(SH),no-till and ridge culture with rotation of rice and rape system(LM),and tillage and ridge culture with rotation of rice and rape system(LF) w... |
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| Keywords: | tillage systems total nitrogen particulate organic nitrogen purple paddy soil |
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