晋西黄土区刺槐林种植密度对植被生长状况的影响  

Growth Status of Artificial Black Locust Forest with Different Densities in the Hilly and Gully Area of Western Shanxi Province

作　　者：郭建斌[1] 赵陟峰 骆汉[1] 

机构地区：[1]水土保持与荒漠化防治教育部重点实验室北京林业大学水土保持学院,北京100083 [2]甘肃省水土保持科学研究所,甘肃兰州730020

出　　处：《水土保持通报》2010年第1期80-84,共5页Bulletin of Soil and Water Conservation

基　　金：国家"十一五"科技支撑计划专题"黄土高原丘陵沟壑半干旱区水土保持抗旱造林及径流林业技术试验示范"(2006BAD03A1201)

摘　　要：通过对山西省方山县土桥沟流域刺槐人工林植被生长指标的比较研究,分析了不同密度刺槐人工林的生长状况,以期为该区刺槐人工林的经营管理提供理论依据和技术支持。研究结果表明,同是林龄为20a的刺槐人工林,高密度林分内林木的树高、冠幅等生长指标值,均比低密度林分内的低,但郁闭度要比低密度林分高;密度大的林分胸径普遍较小,随着林分密度的降低,胸径逐渐增大。刺槐林下灌木层和草本层植被的平均高度、盖度、生物量、物种丰富度都随着林分密度的降低而升高;各林分林下植被层的含水量也存在着随林分密度的降低而升高的趋势。从人工林的生长状况来看,晋西半干旱黄土丘陵沟壑区刺槐人工林的适宜密度为1667株/hm2。The growth indexes of artificial black locust forest with different densities in the hilly and gully area of Western Shanxi Province are studied. The purpose is to provide theory and practice evidences for plantation management in the area. Results show that in the same stand age （20 a）, the values of various growth indexes in higher density forest is lower than those in lower density forest, such as tree height and crown width. However, the value of canopy density is higher than that in lower density forest. The DBH （diameter at breast height） of higher density forest is generally smaller and the DBH increases gradually with the decreased forest density. In the shrub layer and herb layer under different stand densities, plant average height, vegetation coverage, biomass, and species richness all decrease as the stand density increases. Soil water content in the undergrowth vegetation is higher in lower density than that in higher density. In the hilly and gully area of the loess plateau in Western Shanxi Province, the suitable stand density of artificial black locust forest is 1 667 stands/hm^2.

关 键 词：黄土丘陵沟壑区 刺槐人工林 生长状况 密度 

分 类 号：S727.22[农业科学—林木遗传育种]