摘要
为探明不同筇竹林土壤肥力状况,对筇竹林科学施肥提供理论依据。本文以大关县4种类型筇竹林分土壤为研究对象,通过测定土壤pH值、CEC、有机质、全氮等肥力指标,对不同林分土壤肥力指标进行诊断,并采用主成分分析法与模糊综合评价法对土壤单项肥力和综合肥力进行评价。结果显示:(1)4种筇竹林分土壤单项肥力指标均存在差异,不同土层间,除CEC、全钾、全磷外,其余指标均存在显著差异(P<0.05);(2)4种筇竹林分土壤呈酸性,土壤保肥能力较弱,富氮素、有机质,缺磷钾;(3)2种评价方法结果一致,土壤综合肥力系数变幅分别为-2.730~1.983和0.412~0.607,天然筇竹纯林土壤肥力系数最高,人工筇竹纯林肥力系数最低,4种筇竹林土壤肥力总体属中等水平。结果表明,有效磷和pH值是影响综合肥力系数的重要指标。因此,对筇竹林进行土壤管理时,提高土壤pH值和有效磷含量是关键。
In order to explore soil fertility of different Qiongzhuea tumidinda forests and provide theoretical basis for scientific fertilization of Q.tumidinda forest, soil fertility was diagnosed and comprehensively evaluated through the methods of analysis of principal component and fuzzy synthetic evaluation analysis based on the four kinds of soils with different Q.tumidinda forests in the Daguan County and by measuring soil pH,CEC,organic matter, total nitrogen and other fertility indicators.The results showed that:(1)There were differences in individual soil fertility indexes of different Q.tumidinoda forests, and there were significant differences in other indexes except CEC,total potassium and total phosphorus among different soil layers(P<0.05);(2)The soil of the four kinds of Q.tumidinoda stands was acidic, and the soil fertilizer retention capacity was weak, rich in nitrogen and organic matter, but low in phosphorus and potassium;(3)The evaluation results of the two evaluation methods were consistent, the overall soil fertility coefficient varied from-2.730 to 1.983 and 0.412 to 0.607 respectively.The natural pure Q.tumidinoda forest had the highest soil fertility coefficient, while the artificial pure Q.tumidinoda forest had the lowest fertility coefficient.Soil fertility of forest was at a medium level and effective measures should be taken to improve it.The study indicates that it is crucial to improve the content of pH and available phosphorus in Q.tumidinoda forest management.
作者
夏莉
董文渊
钟欢
浦婵
陈新
袁翎凌
黄小东
李希春
XIA Li;DONG Wen-yuan;ZHONG Huan;PU chan;CHEN Xin;YUAN Ling-ling;HUANG Xiao-dong;LI Xi-chun(College of Ecology and Environment,Southwest Forestry University,Kunming Yunnan 650224,P.R.China;Institute of Qiong Bamboo of Southwest Forestry University,Kunming Yunnan 650224,P.R.China;Daguan County Forestry and Grassland Administration,Daguan Yunnan 657000,P.R.China;College of Forestry,Southwest Forestry University,Kunming Yunnan 650224,P.R.China)
出处
《西部林业科学》
CAS
北大核心
2022年第1期62-69,共8页
Journal of West China Forestry Science
基金
国家林业公益性行业科研专项(201204103)
中央财政林业科技推广示范资金项目([2018]TG14号)
中央财政林业科技推广示范资金项目([2019]TG14号)
昭通市凤凰计划项目。
关键词
筇竹林
土壤肥力
诊断
评价
Qiongzhuea tumidinoda forest
soil fertility
diagnosis
evaluation
