文献类型：期刊文献

中文题名：元谋干热河谷地区不同造林树种对土壤的改良作用研究

英文题名：Effects of Some Tree Species on Soil in Yuanmou Hot and Dry Valley

作者：李昆[1] 曾觉民[2]

第一作者：李昆

机构：[1]中国林科院资源昆虫研究所;[2]西南林学院

年份：1999

卷号：19

期号：3

起止页码：161-164

中文期刊名：西南林学院学报

外文期刊名：JOURNAL OF SOUTHWEST FORESTRY COLLEGE

基金：中国林业科学研究院人才基金资助项目

语种：中文

中文关键词：干热河谷;造林;土壤改良;造林树种

外文关键词：Hot and dry valley;Afforestation;Improvement soil

分类号：S714.6

摘要：经过 4年多的林木培育 ,元谋干热河谷地区的土壤有了不同程度的改良 .其中 ,改良作用较大的树种是山毛豆、新银合欢、苏门答腊金合欢 ,土壤有机质、全氮、速效氮等指标比对照林地提高了 1倍 .马占相思枯落物量大 ,营养元素含量多 ,但不易分解 ,土壤改良效果不如其它豆科植物 ;赤桉的枯落物最少 ,是一个消耗地力的树种 .
Soil in the hot and dry valley in Yuanmou was improved to some degree by growing trees for four years. Among planted tree species, improvement effect of Tephrosia candida, lencaephala, Acacia glauca on soil is better than other tree species. Organic matter, total nitrogen, hydrolysable in test fields were increased one time as much as those of control field.Improvement effect of Acacia mang uim on soil is poorer as its leaves is thicker and bigger, though it has the largest quantity of litter leaves and highest content of nutrition elements. Improvement effect of Ecalyptus camaldulensis on soil is the poorest and its quantity of litter leaves is also the smallest. Great attention should be paid to mixed forest in system of the Yangzi River shelterbelt in the hot and dry valley in Yuanmou Mixed forest is favourable to increasing imput of preciptation to plantation and improving soil, as well as to raising the ability of reserving water and providing water to soil. Establishing mixed forests is essential to maintain steady and vigorous growth of trees in the areas.