永寿县底角沟流域刺槐人工林稳定性研究  

Landscape Pattern and Stability of Robinia Pseudoacacia Plantations in Dijiaogou Watershed

作　　者：高建 张志东 王迪海[2] GAO Jian;ZHANG Zhi-dong;WANG Di-hai(Forest Institute of Xianyang, Xianyang, Shaanxi 712000;College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100)

机构地区：[1]咸阳市林业科学研究所,陕西咸阳712000 [2]西北农林科技大学林学院,陕西杨凌712100

出　　处：《陕西林业科技》2021年第5期35-39,共5页Shaanxi Forest Science and Technology

基　　金：国家重点研发计划项目“黄土高原人工生态系统结构改善和功能提升技术”(2017YFC0504605)。

摘　　要：以陕西省永寿县底角沟流域刺槐人工林为对象,通过样地调查选取更新潜力、群落生物量、群落组成及结构、生物多样性和土壤肥力5类19个因子为评价指标,运用主成分分析综合评价法,分析评价刺槐人工林稳定性。结果表明,底角沟流域刺槐纯林稳定性较差,杨树与刺槐混交林的稳定性远好于纯林,影响刺槐林稳定性较大的因素有更新潜力、乔木蓄积量、灌木生物量、生物多样性和土壤有机碳含量。239 hm2人工林刺槐中,稳定的杨树刺槐人工林占2.3%;较稳定的刺槐人工林占83.6%;不稳定的刺槐人工林占14.1%,流域内85.9%刺槐人工林处于较稳定状态。对于不稳定的林分逐步抚育改造或营建混交林,增加流域内混交林的比列,提高流域内人工林整体的稳定性。Robinia Pseudoacacia plantation is of great significance to maintain the ecological environment of the area,but over time,many problems of plantation in this area have been exposed,such as low forest stock,poor biological stability and soil fertility decline.In this paper,the plantation of Robinia Pseudoacacia in the Dijiaogou watershed was evaluated regarding its stability.19 factors including the forest regeneration potential,community biomass,community composition and structure,biodiversity and soil fertility were selected as evaluation indicators.The stability model of Robiniapseudoacaia plantation was established by principal component analysis.The results showed that the stability of Robinia Pseudoacacia plantation was poor,and the stability of mixed forest of Robinia Pseudoacacia and Populus davidiana was much better.The factors affecting its stability were regeneration potential,tree stock,shrub stock,biodiversity and organic carbon content.Of 10 plots of Robinia pseudoacaia plantations with a total area of 239 hm2,only one plot with an area of 5.41 hm2 accounting for 2.3%of the total area was stable,eight plots are relatively stable,with an area of 200.02 hm2 accounted for 83.6%.One plot of Robinia pseudoacaia plantation is unstable,with an area of 33.51 hm2 accounted for 14.1%.The result indicates that most of the Robinia pseudoacaia plantations in the watershed area are in a relatively stable state.Therefore,the key factors that affect the stability of Robinia pseudoacaia plantation should be cultivated and reformed in the future forest management.

关 键 词：刺槐 人工林 稳定性 渭北黄土高原 

分 类 号：S718.55[农业科学—林学]