地理科学 ›› 2011, Vol. 31 ›› Issue (6): 753-757.doi: 10.13249/j.cnki.sgs.2011.06.753

• 论文 • 上一篇    下一篇

耕作方式对西南地区紫色水稻土全氮及碱解氮的影响

祝滔1, 郝庆菊1,2, 江长胜1,2, 袁雪1,2   

  1. 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
  • 收稿日期:2010-11-20 修回日期:2011-02-11 出版日期:2011-06-20 发布日期:2011-06-20
  • 通讯作者: 江长胜,副教授。E-mail: Jiangcs@126.com E-mail:Jiangcs@126.com
  • 基金资助:
    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。

Tillage Impacts on Soil Total Nitrogen and Alkali-hydrolyzed Nitrogen of the Purple Paddy Soil in Southeast China

ZHU Tao1, HAO Qing-ju1,2, JIANG Chang-sheng1,2, YUAN Xue1,2   

  1. 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
  • Received:2010-11-20 Revised:2011-02-11 Online:2011-06-20 Published:2011-06-20

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。

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 ridge culture with rotation of rice and rape system (LF). The content of soil total nitrogen in the 0-60 cm soil layers under different tillage systems was 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), the content of alkali-hydrolyzed nitrogen was 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). Long-term LM treatment significantly increased soil total nitrogen content. The C/N ratio was LM (14.94)>XM (10.49)>SH (10.38)>LF (10.20)>DP (10.18) which indicated that an easier nutrients release to soil during the process of organic matter decomposition under no-till systems.

中图分类号: 

  • Q948