不同土地利用方式下喀斯特地区岩石溶蚀速率及其驱动因素  

Rock Dissolution Rate and Soil Properties of Karst Soil under Different Land Use Ways

作　　者：姜鑫[1] 黄先飞[1] 秦樊鑫[1] 张珍明 JIANG Xin;HUANG Xianfei;QIN Fanxin;ZHANG Zhenming(Guizhou Normal University,Key Laboratory of Mountain Environmental Information System and Eco-environmental Protection,Guiyang 550025,China;Guizhou Institute of Biology,Guiyang 550025,China)

机构地区：[1]贵州师范大学,贵州省山地环境信息系统与生态环境保护重点实验室,贵州贵阳550025 [2]贵州省生物研究所,贵州贵阳550025

出　　处：《云南农业大学学报（自然科学版）》2020年第5期899-905,共7页Journal of Yunnan Agricultural University:Natural Science

基　　金：贵州省林业科研课题(黔林科合[2017]17号);贵州省科技计划项目(黔科合LH字[2017]7371号);贵州师范大学博士科研启动基金项目(GZNUD[2017]11号);贵州省科学技术基金(黔科合基础[2020]1Y178)。

摘　　要：【目的】研究不同土地类型下喀斯特土下溶蚀速率及其主要影响因素。【方法】采用野外布点采样、实验室测定和地统计学分析相结合的方法,定量研究不同土地利用方式下土下溶蚀速率及其主要土壤性状,并利用典范分析法分析了影响岩溶速率的主要环境因子。【结果】不同土地利用方式下溶蚀速率范围为85.14~195.59 mg/(m2·d),溶蚀速率依次为自然林地>自然草地>人工草地>自然灌丛>人工林地,自然状态下的岩溶作用强于人工干预下的岩溶作用,且从土地利用方式来看林地的岩溶作用优于草地和灌丛。溶蚀速率与土壤容重呈极显著正相关关系(P<0.01,R=0.664);与土壤孔隙度和土壤含水量呈极显著负相关关系(P<0.01),相关系数分别为−0.711和−0.521。【结论】人类活动能够抑制岩溶作用的进程,人工种草效果要好于人工造林。[Purpose]To study the rock dissolution rate and its main influencing factors under different land uses.[Method]The quantitatively study on rock dissolution rate and its main soil properties under different land uses were conducted based on field sampling,laboratory measurement and geostatistical analysis.The main environmental factors affecting the rock dissolution rate were analyzed by using the canonical analysis method.[Result]The range of dissolution rate under different land use patterns was 85.14-195.59 mg/(m2·d).The rock dissolution rate of different land uses followed the order:natural forest land>natural grassland>artificial grassland>natural shrub land>artificial forest land;the rock dissolution under natural land use patterns was stronger than that under artificial intervention,and the rock dissolution rate of forest land was better than that of grassland in terms of land use patterns.The dissolution rate had a extremely significant positive correlation with soil bulk density(P<0.01),with a correlation coefficient of 0.664;it had a extremely significant negative correlation with soil porosity and soil water content(P<0.01),with a correlation coefficient of−0.711 and−0.521,respectively.Each factor was related to each other and restricted each other,which jointly affected the dissolution intensity.[Conclusion]Human activities can promote rock dissolution rate,and the effect of planting grass is better than that of planting forest.

关 键 词：岩溶速率 土壤性质 影响因子 喀斯特 

分 类 号：S152.4[农业科学—土壤学] X141[农业科学—农业基础科学]