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耕作方式对西南地区紫色水稻土全氮及碱解氮的影响
引用本文:祝滔,郝庆菊,江长胜,袁雪. 耕作方式对西南地区紫色水稻土全氮及碱解氮的影响[J]. 地理科学, 2011, 31(6): 753-757. DOI: 10.13249/j.cnki.sgs.2011.06.753
作者姓名:祝滔  郝庆菊  江长胜  袁雪
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. 重庆市农业资源与环境研究重点实验室, 重庆 400716
基金项目:国家自然科学基金项目(41005069和40805050); 中央高校基本科研业务费专项资金(XDJK2009B026); 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)资助
摘    要:以位于西南大学试验农场的紫色土长期免耕试验田为研究对象,探讨了不同耕作方式-冬水田平作(DP)、水旱轮作(SH)、垄作免耕(LM)、厢作免耕(XM)和垄作翻耕(LF)对紫色水稻土全氮及碱解氮的影响。结果表明,在0~60 cm的土壤深度内,不同耕作方式下土壤全氮的含量为LM (1.53 g/kg)>DP (1.50 g/kg)>XM (1.32 g/kg)>LF (1.31 g/kg)>SH (1.16 g/kg),碱解氮为DP (111.48 mg/kg)>LM (105.20 mg/kg)>SH (101.97 mg/kg)>LF (97.26 mg/kg)>XM (95.19 mg/kg),长期垄作免耕有利于土壤中全氮的提高。不同耕作处理下土壤C/N在7.96~16.56之间,免耕农作更有利于有机质矿化过程中养分的释放。

关 键 词:耕作  土壤全氮  碱解氮  碳氮比  紫色水稻土
收稿时间:2010-11-20
修稿时间:2011-02-11

Tillage Impacts on Soil Total Nitrogen and Alkali-hydrolyzed Nitrogen of the Purple Paddy Soil in Southeast China
ZHU Tao,HAO Qing-ju,JIANG Chang-sheng,YUAN Xue. Tillage Impacts on Soil Total Nitrogen and Alkali-hydrolyzed Nitrogen of the Purple Paddy Soil in Southeast China[J]. Scientia Geographica Sinica, 2011, 31(6): 753-757. DOI: 10.13249/j.cnki.sgs.2011.06.753
Authors:ZHU Tao  HAO Qing-ju  JIANG Chang-sheng  YUAN Xue
Affiliation:1. Key Laboratory of Eco-environments in Three Gorges Reservoir Region of Ministry of Education, College of Resources and Environment, Southwest University, Chongqing 400715, China;2. Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing 400716, China
Abstract:Soil total nitrogen and alkali-hydrolyzed nitrogen based on a long-term experiment with various tillage systems were studied in a purple paddy soil at the farm of Southwest University,Chongqing,China.The experiment included five tillage treatments: 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),no-till and plain culture with rotation of rice and rape system(XM),and tillage and r...
Keywords:Tillage  soil total nitrogen  alkali-hydrolyzed nitrogen  C/N  purple paddy soil  
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