黄土高原不同林型对土壤物理性质影响的研究  

A STUDY ON EFFECTS OF DIFFERENT TYPES OF FOREST ON THE LOESS PLATEAU ON PHYSICAL PROPERTIES OF SOIL

作　　者：李香兰[1] 田积莹[1] 张成娥[1] 

机构地区：[1]中国科学院,水利部,西北水土保持研究所

出　　处：《林业科学》1992年第2期98-106,共9页Scientia Silvae Sinicae

基　　金：国家自然科学基金

摘　　要：通过黄土高原不同林型对土壤物理性质影响的研究得出:1.两林区各乔木林型下表层土壤砂粒、粗砂粒、中砂粒、细砂粒,各平均含量均为:乔木林地>灌木林地>农地;其剖面平均含量亦是如此;在剖面中的分布,随土层加深,含量降低;2.表层土壤粗粉粒平均含量为:灌木林地>乔木林地,低龄林地>中龄林地>高龄林地,中粉粒与细粉粒之和则是相反;3.表层土壤物理性粘粒平均含量为:乔木林地>灌木林地,高龄林地>中龄林地>低龄林地;4.土壤含水量为:乔木林地>灌木林地>农地。Through a study on the effects of different types of natural forest in two districts of the Loess Plateau on physical properties of soil, research results indicated that (1) in both districts, average contents of coarse sand (1.0—0.5mm in diameter), medium (0.5—0.25mm) and fine (0.25—0.05mm) in the top layer of the soil showed the following sequnce: forest land>bush land>farm land; similar sequnce also obtained on the soil profile despite varying with soil depth; (2) average contents of coarse silt in the top layer of the soil were appeared in the following order: bush land>forest land, young stands>middle-aged stands>mature stands while the total contents of medium and fine silt were adversely; (3) average contents of physical particales of clay in the top layer of the soil were in the order of forest land>bush land, mature forest stands>middle-aged stands>young stands; (4) the contents of soil moisture were arranged in the following sequnce: forest land>bush land>farm land.

关 键 词：林型 土壤 物理性质 黄土高原 

分 类 号：S714.2[农业科学—林学]