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

• 研究简报 • Previous Articles     Next Articles

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

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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