红壤丘岗区人工林恢复过程中的土壤养分状况  

DYNAMIC OF NUTRIENTS IN ARTIFICIAL FOREST SOIL IN LOW HILL RED SOIL REGION

作　　者：何园球[1] 沈其荣[2] 王兴祥[1] 

机构地区：[1]中国科学院南京土壤研究所,南京210008 [2]南京农业大学,南京210095

出　　处：《土壤》2003年第3期222-226,共5页Soils

基　　金：中国科学院创新课题资助(KZCX2-407;ISSASIP0201和KZCX2-413)。

摘　　要：针对红壤丘岗区的自然条件和地形特点,在岗地上坡布置了一组人工林恢复实验,研究植被恢复过程中林地土壤的养分状况.12年的研究结果表明:人工恢复的阔叶林和混交林土壤养分前期下降,3年以后一直上升,总体出现赢余;原状的稀疏马尾松林和自然恢复植被土壤养分一直处于下降状况,前期(1~3年)下降快,后期较慢,目前仍在缓慢下降,特别是自然恢复植被,土壤养分处于严重的退化状况.在开发利用红壤丘岗地过程中,必须注意增加地表覆盖度,避免盲目开垦,减少水分和养分流失,使这类土壤资源得以持续利用.A long-term experiment based on the natural conditions and geomorphologic characteristics of the red soil area was conducted on top of a low hill of red soil derived from the Quaternary red clay in the Ecological Experiment Station of Red Soil, the Chinese Academy of Science, located in Yingtan (28?530 N, 116?530 E), Jiangxi Province to study dynamics of nutrients in the process of artificial rehabilitation of forests. Results of the 12 years-long experiment show that the soil nutrient budget of broadleaf forests and mixed forests tended to be in deficit in the first 1~3 years and began to turn the other way round afterwards and eventually gained in surplus.. But under original sparse natural mason pine forests and under naturally restored vegetation, the soils were losing nutrients rapidly in the first three years and slowly in the later years. They are still losing, but very slow. Especially in the soil under naturally restored vegetation, the nutrient loss is so serious that the soil is on the brink of degradation. It is, therefore, essential that special attention be paid to restoring vegetation coverage, avoiding random reclamation, and controlling water and soil loss so as to protect the soil resources for sustainable utilization.

关 键 词：红壤 人工林 土壤养分 

分 类 号：S157.9[农业科学—土壤学]