喀斯特地区石漠化程度与林分水源涵养的相关性研究Study on Correlation between Rocky Desertification Degree and Forest Water Conservation in Karst Area
李廷铃,熊康宁,杨珊,张仕豪,刘海燕
LI Tingling,XIONG Kangning,YANG Shan,ZHANG Shihao,LIU Haiyan
摘要(Abstract):
为探究喀斯特石漠化地区不同类型森林涵养水源能力,以中国南方喀斯特毕节-撒拉溪潜在-轻度石漠化研究区、关岭-贞丰花江中-强度石漠化研究区、施秉无-潜在石漠化研究区9种森林为研究对象,测定不同森林的枯落物层和土壤层涵养水源能力。结果表明:枯落物层有效拦蓄量排序为:中-强度石漠化研究区柚木>翅荚香槐>花椒,潜在-轻度石漠化研究区华山松>光皮桦>核桃,无-潜在石漠化研究区梨>南川椴>马尾松;不同林型土壤容重在0.85 g·cm~(–3)~1.34 g·cm~(–3)间变动,总空隙度在47.71%~65.69%间变动,土壤容重与土壤孔隙度、持水量和蓄水量均呈负相关关系(p<0.05),而土壤含水量则与其呈正相关关系(p<0.05);采用Topsis优劣解距离法计算不同林型综合涵养水源能力结果为:中-强度石漠化研究区柚木>翅荚香槐>花椒,潜在-轻度石漠化研究区华山松>光皮桦>核桃,无-潜在石漠化研究区马尾松>梨>南川椴。研究结果可为后续石漠化治理和植被修复提供依据。
In order to investigate the water conservation capacity of different types of forest in karst rocky desertification areas, the water-holding capacity of litter layer and soil layer of different forests was measured in nine types of forest in Bijie-Salaxi potential-mild rocky desertification research area, Guanling-Zhenfeng Huajiang mediumintensity rocky desertification research area and Shibingwu potential rocky desertification research areas in southern China. The results showed that:(1) The order of effective retention capacity of litter layer in the medium-intensity rocky desertification study area was: Tectona grandis > Cladrastis platycarpa > Zanthoxylum bungeanum, in the potentialmild rocky desertification study area was: Pinus armandii > Betula luminifera > Juglans regia, in the non-potential rocky desertification study area was: Pyrus > Tilia nanchuanensis > Pinus massoniana.(2) Soil bulk density of different forest types varied from 0.85 g·cm~(–3) to 1.34 g·cm~(–3), and total porosity varied from 47.71% to 65.69%. Soil bulk density was negatively correlated with soil porosity, water holding capacity and water storage(p < 0.05), while soil water content was positively correlated with soil porosity(p < 0.05).(3) The comprehensive water-holding capacity of different forest types was calculated by Topsis method. The results showed that in medium-intensity rocky desertification study area: Tectona grandis > Cladrastis platycarpa > Zanthoxylum bungeanum, in potential-mild rocky desertification study area: Pinus armandii > Betula luminifera >Juglans regia, and in non-potential rocky desertification study area: Pinus massoniana > Pyrus > Tilia nanchuanensis. The results could provide a basis for subsequent rocky desertification management and vegetation restoration.
关键词(KeyWords):
喀斯特;石漠化;森林;涵养水源;Topsis法
Karst;Rocky desertification;Forest;Water conservation;Topsis method
基金项目(Foundation): 国家十三五重点研发计划课题(2016YFC0502607);; 贵州省科技计划重大专项([2017]5411);; 贵州省世界一流学科建设计划项目([2019]125)
作者(Author):
李廷铃,熊康宁,杨珊,张仕豪,刘海燕
LI Tingling,XIONG Kangning,YANG Shan,ZHANG Shihao,LIU Haiyan
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