生态环境学报Issue(1)：30-34,5.
间伐对杉木人工林林下植被多样性及其营养元素现存量影响
Effect of thinning on understory vegetation diversity and its nutrient stocks in Cunninghamia lanceolata plantation
摘要
Abstract
Thinning changed stand structure, which influenced growth and development of understory vegetation. Long term effect of thinning on understory vegetation diversity is still poorly understood. Simpson index、Shannon-Wiener index and Pielou index were used to evaluate understory vegetation diversity in three thinning treatments in Chinese fir plantations in Kaihua County, Zhejiang Province,China. Change of nutrient contents and current nutrient stocks of the understory vegetation in the three thinning treatments were also studied. Traditional silviculture operation as a control (stand was thinned approximately 15%(T1) at the 14th year during a rotation), moderate (total thinning intensity approximately 35%, T2) and heavy intensity (total thinning intensity approximately 50%, T3) thinning treatments were thinned twice (in the 7th year and 14th year). 15 years after thinning, the number of plant species in the three thinning treatments was 18 (T1), 17 (T2) and 20 (T3), respectively. Total plant density and coverage of the understory vegetation increased with the increase of thinning intensity. The Simpson index、Shannon-Wiener index and Pielou index of the understory vegetation were no significant differences among the three thinning treatments (P>0.05). Total carbon (TC), total phosphorus (TP) and total potassium (TK) contents of the understory vegetation were not significantly different among these three thinning treatments (P>0.05). Total nitrogen (TN) content reduced with increasing thinning intensity, TN in T3 treatment was significantly lower than that in T1 treatment (P<0.05). The biomass of understory vegetation increased with the increase of thinning intensity. No significant difference was detected in TC, TN, TP or TK stocks of understory vegetation among the three thinning treatments (P>0.05). These results illustrate thinning intensity may not have a significant impact on understory vegetation diversity and nutrient accumulation in Chinese fir plantation after 15 years treatment.关键词
杉木/间伐/林下植被多样性/营养元素/生物量Key words
Chinese fir/thinning/understory vegetation diversity/nutrients/biomass分类
农业科技引用本文复制引用
成向荣,徐金良,刘佳,虞木奎..间伐对杉木人工林林下植被多样性及其营养元素现存量影响[J].生态环境学报,2014,(1):30-34,5.基金项目
国家自然科学基金（31300519）；浙江省自然科学基金（LY12C16007）；中央级公益性科研院所基本科研业务费专项资金 （）
