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›› 2007, Vol. 43 ›› Issue (zk): 101-105.

• 研究简报 • 上一篇    下一篇

退耕还林区林草复合模式土壤养分动态

杨丁丁1,2 罗承德1 宫渊波1 梁剑1   

  1. 1.四川农业大学林学园艺学院,雅安625014;2.中国科学院地理科学与资源研究所北京100101
  • 收稿日期:2006-04-25 修回日期:1900-01-01 出版日期:2007-10-25 发布日期:2007-10-25

The Dynamic of Soil Nutrient under Forest and Grass Composite Pattern in Area of Conversion of Farmland to Forests

Yang Dingding1,2,Luo Chengde1,Gong Yuanbo1,Liang Jian1   

  1. 1.College of Forestry and Horticulture,Sichuan Agricultural University Ya'an 625014;2. Research Institute of Geographic Science and Resources,CAS Beijing 100101
  • Received:2006-04-25 Revised:1900-01-01 Online:2007-10-25 Published:2007-10-25

关键词: 退耕还林, 林草复合模式, 平衡土壤溶液, 养分动态

Abstract: This paper analyzed the difference of soil nutrient and the dynamics of available nutrient in soil solution of the forest and grass composite pattern and the farmlands on site.The result showed that the content of soil total N,hydrolysable N,organic matter in forest and grass composite pattern was higher than in farmland.The content of total P,available P,total K and slowly K was lower than that in farmland.The seasonal change of NH4+-N,NO3--N,PO43-and K+ was influenced by the growing of plant,precipitation and temperature.

Key words: conversion of farmland to forests, forest and grass composite pattern, balanced soil solution, dynamic of soil nutrient