干旱区生态环境知识资源中心(Arid): 喀斯特地区土壤有机碳分布及其对种植管理模式的响应

Arid

	喀斯特地区土壤有机碳分布及其对种植管理模式的响应
其他题名	Distribution characteristics of soil total organic carbon in typical Karst area and its response to different planting and management modes of slope farmland
	黄凯; 李瑞; 杨坪坪; 盘礼东; 张琳卿
来源期刊	中国水土保持科学
ISSN	2096-2673
出版年	2021
卷号	19 期号:3 页码:2096-2673
中文摘要	为探明典型喀斯特石漠化区土壤总有机碳(TOC)的分布特征,以及不同种植/管理模式下土壤总有机碳的变化规律。通过野外定点取样法和实验室分析法,以潜在-轻度石漠化区黔西金兰示范区,以及中-强度石漠化区关岭/贞丰花江示范区为研究区,探讨TOC随石漠化等级变化的内在机理以及对不同种植/管理模式的响应机制。结果表明:1)金兰示范区TOC均值为29.06 g/kg,花江示范区TOC均值33.02 g/kg。2个研究区间TOC差异不显著;2)4种石漠化演替阶段中,强度石漠化TOC最高,为38.96 g/kg,中度石漠化与强度石漠化TOC差异显著;3)不同种植模式TOC呈林草复合>林农复合>经果林纯林>人工草地>其他作物单作>玉米单作;4)3种田间管理模式土壤TOC差异显著,随着管理模式精细化程度的提升,TOC呈现逐渐升高的趋势。同非喀斯特地区相比,喀斯特区表层土总有机碳含量并不低,且随着石漠化的加剧,土壤总有机碳并不总呈降低趋势;种植和管理模式对土壤总有机碳影响较大,复合种植、种草、造林以及精细化管理均可大幅度提高坡耕地总有机碳含量。本文试验结果可为喀斯特地区坡耕地种植结构调整,以及区域水土流失、石漠化综合防治提供理论依据。
英文摘要	[Background]Karst landforms are concentrated in the southwest of China.Under the influence of both natural and human factors,rocky desertification is serious in this area.The total organic carbon(TOC)content is an important index to reflect the soil quality.Compared with traditional planting mode,compound planting mode may reduce soil erosion and improve TOC.The purpose of this paper is to explore the distribution characteristics of TOC in typical Karst rocky desertification areas and the change patterns of TOC under different planting and management modes.[Methods]Qianxi Jinlan demonstration area and Guanling-Zhenfeng Huajiang demonstration area were taken as study areas.The two study areas are of strong typicality in rocky desertification degree and slope farmland planting modes.Based on the field sampling and laboratory analysis,the intrinsic mechanism of TOC changing with the degree of rocky desertification and the response mechanism to different planting and management modes were discussed.[Results]1)The average TOC of Qianxi Jinlan demonstration area was 29.06 g/kg.The average TOC of Guanling-Zhenfeng Huajiang demonstration area was 33.02 g/kg.There was no significant difference in TOC content between the two study areas.2)The TOC of intensive rocky desertification was the highest,which was 38.96 g/kg.There was a significant difference in TOC content between moderate rocky desertification and intensive rocky desertification(P <0.05).3)The TOC content in different planting modes showed the following pattern:silvopasture(34.38 g/kg)>agroforestry(33.35 g/kg)>economic fruit forest(32.23 g/kg)>cultivated pastures(30.91 g/kg)>monoculture of other crops(27.20 g/kg)>maize(17.67 g/kg).4)There was a significant difference in TOC content among 3 field management modes(refined management,general management,and extensive management)in slope farmland.With the increase in the delicacy of field management mode,TOC content showed a trend of increasing gradually.[Conclusions]Compared with non-karst areas,the TOC content of topsoil in Karst area is not low.With the aggravation of rocky desertification,the TOC of soil will not always decrease.Planting and management modes have a great impact on TOC.In general,compound planting,grass planting,afforestation,and refined management may significantly improve the content of TOC in slope farmland.The results of this paper may provide a theoretical basis for the adjustment of the planting structure in the Karst slope farmland,and the comprehensive control of regional soil erosion and rocky desertification.
中文关键词	石漠化 ; 土壤总有机碳 ; 坡耕地 ; 田间管理模式 ; 复合种植 ; 喀斯特
英文关键词	rocky desertification soil total organic carbon slope farmland field management mode compound planting karst
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7008345
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365478
作者单位	黄凯, 贵州师范大学喀斯特研究院;;国家喀斯特石漠化防治工程技术研究中心, ;;国家喀斯特石漠化防治工程技术研究中心, ;;贵阳, ;; 550001;;550001.; 李瑞, 贵州师范大学喀斯特研究院;;国家喀斯特石漠化防治工程技术研究中心, ;;国家喀斯特石漠化防治工程技术研究中心, ;;贵阳, ;; 550001;;550001.; 杨坪坪, 贵州师范大学喀斯特研究院;;国家喀斯特石漠化防治工程技术研究中心, ;;国家喀斯特石漠化防治工程技术研究中心, ;;贵阳, ;; 550001;;550001.; 盘礼东, 贵州师范大学喀斯特研究院;;国家喀斯特石漠化防治工程技术研究中心, ;;国家喀斯特石漠化防治工程技术研究中心, ;;贵阳, ;; 550001;;550001.; 张琳卿, 贵州师范大学喀斯特研究院;;国家喀斯特石漠化防治工程技术研究中心, ;;国家喀斯特石漠化防治工程技术研究中心, ;;贵阳, ;; 550001;;550001.
推荐引用方式 GB/T 7714	黄凯,李瑞,杨坪坪,等. 喀斯特地区土壤有机碳分布及其对种植管理模式的响应[J],2021,19(3):2096-2673.
APA	黄凯,李瑞,杨坪坪,盘礼东,&张琳卿.(2021).喀斯特地区土壤有机碳分布及其对种植管理模式的响应.中国水土保持科学,19(3),2096-2673.
MLA	黄凯,et al."喀斯特地区土壤有机碳分布及其对种植管理模式的响应".中国水土保持科学 19.3(2021):2096-2673.