宁夏干旱风沙区不同种植密度柠条林对土壤水分及植被生物量影响研究  

Effects of Different Planting Densities of Caragana korshinskii Forest on Soil Moisture and Vegetation Biomass in Arid Sandy Area of Ningxia

作　　者：谢国勋 王增吉 王占军[2] 何建龙[2] 

机构地区：[1]宁夏盐池县环境保护和林业局,宁夏盐池751500 [2]宁夏农林科学院荒漠化治理研究所,宁夏银川750002

出　　处：《宁夏农林科技》2014年第11期12-14,共3页Journal of Ningxia Agriculture and Forestry Science and Technology

基　　金：宁夏农林科学院先导资金项目"宁夏干旱风沙区人工林固碳特征及固碳潜力研究";宁夏科技攻关课题(KGX-11-09-03)

摘　　要：以宁夏干旱风沙区不同种植密度的人工柠条林为研究对象,主要研究不同密度柠条林对土壤水分及植被生物量的影响。结果表明:随着造林密度的增加,土壤水分含量呈下降趋势;种植密度为1 400丛/hm2(12 m带距)人工柠条林土壤体积含水量最高,达到17.6%;种植密度为4 400丛/hm2(3 m带距)人工柠条林土壤体积含水量最低,仅为8.8%。不同种植密度柠条林对植物群落的生物量影响很大,随着造林密度的增加,植物生物量呈明显下降趋势。植被生物量最高的为自然封育地,达到了195.78 g/m2;其次是种植密度为1 400丛/hm2(12 m带距)柠条林带。With the Caragana korshinskii forest of different planting densities in the arid sandy area of Ningxia as the research object, the effects of different densities of Caragana korshinskii forest on the soil moisture and vegetation biomass were studied. The results showed that along with the increase of the planting density of Caragana korshinskii forest the soil water content decreased, the soil water content was the highest, reaching 17.6%, when the planting density of the artificial Caragana korshinskii forest was 1400 bundles/hm^2（with a row distance of 12 m）; the soil moisture was the lowest, only8.8%, when the planting density of the artificial Caragana korshinskii forest was 4 400 bundle/hm^2（with a row distance of 3m）. The effects of different planting densities on the vegetation biomass of the plant community were significant. With the increase of the planting densities the vegetation biomass decreased significantly. The vegetation biomass of the natural enclosure land was the highest, reaching 195.78 g/m^2, followed by the Caragana korshinskii forest with a planting density of 1400 bundle/hm^2（with a row distance of 12 m）.

关 键 词：干旱风沙区 人工柠条林 土壤水分 植被生物量 

分 类 号：S793.3[农业科学—林木遗传育种]