干旱区生态环境知识资源中心(Arid): 红河干旱河谷区典型地类植物根系特征对土壤大孔隙的影响

Arid

	红河干旱河谷区典型地类植物根系特征对土壤大孔隙的影响
其他题名	Effects of Root Characteristics of Typical Native Plants on Soil Macropore in the Arid Valley of Honghe River
	陈婷婷; 段旭; 赵洋毅; 冷鹏; 邵一敏; 杜云祥
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2020
卷号	27 期号:6 页码:107-115
中文摘要	为探明植物根系特征对土壤大孔隙的影响,以红河干旱河谷典型地段玉溪新平县龙潭箐小流域内林地、荒草地、园地和农地4种地类下植物根系和土壤为研究对象, 基于水分穿透曲线法和经典统计分析,定量分析了植物根系特征对土壤大孔隙形成的影响。结果表明:(1)4种地类土壤水分穿透曲线的稳定出流速率表现为林地 >园地>荒草地>农地,各地类间显著差异(p<0.05),土壤每层水分穿透曲线发展趋向一致,均为先增加后趋于稳定,表层出流速率均大于深层;(2)4 种地类土壤大孔隙当量半径在0.3~3.7 mm范围内,其中,0.3~1.0 mm的密度最大,占大孔隙总数量的96%以上,大于1.0 mm的密度最小,只占小于大孔隙总数的4%;大孔隙密度为1.38310~4~2.47710~4个/m~2,4种地类中大孔隙密度均随着土层深度的增加而逐渐减少,整体趋势表现为林地>园地>荒草地>农地;(3)随着土层深度的递增4种地类样地中植物根长密度及根重密度都表现为减小的趋势;细根系( 根径d<1 mm)对土壤大孔隙的形成有高贡献度,而相对较粗的根系(根径d>1 mm)对土壤大孔隙的产生贡献度较低;(4)农地、园地与林地土壤大孔隙率和0
英文摘要	In order to investigate the effect of plant root system characteristics on soil macropores,based on the water penetration curve method and classical statistical analysis,quantitative analysis of plants in the forest land,grassland,garden land and agricultural land in the Longtanqing small watershed of Xinping County,Yuxi City was carried out.The effects of plant root characteristics on the formation of soil macropores were quantitatively analyzed.The results show that:(1)the stable outflow rate of soil water penetration curves of four land plots decrease in the order:forest land>garden>wasteland>farmland,and there are significant differences among different types(p<0.05);the overall development trend of the curve is consistent,all increase first,and then tend to be stable after a period of time;the surface outflow rate is greater than the deep layer;(2)the equivalent pore diameter of the four types of soil mcropores is between 0.3~3.7 mm,of which the density of 0.3~1.0 mm is the largest,accounting for more than 96%of the total number of large pores,the density greater than 1.0 mm is the smallest,accounts for only 2%~4% of the total number of large pores;the large pore density is 1.38310~4~2.47710~4 per square meter,the macropore densities in the four types of land decrease gradually with the increase of the depth of the soil layer.The overall trend follows the order:forest land>garden land>wasteland>farmland;(3)both root length density and root weight density show the decreasing trend with the increase of soil depth;the fine root system (root diameter d<1 mm)has the high contribution to the formation of soil macropores,while the relatively thick root system (root diameter d>1 mm)has the lower contribution to the formation of large pores in the soil;(4)the correlation between the soil macropores of the agricultural land,garden land and forest land and the root weight density within the root diameter range of 0
中文关键词	土壤大孔隙 ; 水分穿透曲线 ; 根长密度 ; 根重密度 ; 干旱河谷
英文关键词	soil macropore water penetration curve root length density root weight density dry valley
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6816654
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353875
作者单位	陈婷婷, 西南林业大学生态与环境学院, 昆明, 云南 650224, 中国. 邵一敏, 西南林业大学生态与环境学院, 昆明, 云南 650224, 中国. 段旭, 西南林业大学生态与环境学院;;国家林业和草原局云南玉溪森林生态系统国家定位观测研究站, ;;国家林业和草原局云南玉溪森林生态系统国家定位观测研究站, 昆明;;昆明, ;; 650224;;650224. 赵洋毅, 西南林业大学生态与环境学院;;国家林业和草原局云南玉溪森林生态系统国家定位观测研究站, ;;国家林业和草原局云南玉溪森林生态系统国家定位观测研究站, 昆明;;昆明, ;; 650224;;650224. 冷鹏, 云南省水土保持生态环境监测总站, 昆明, 云南 650106, 中国. 杜云祥, 新平彝族傣族自治县水利局, 新平, 云南 653400, 中国.
推荐引用方式 GB/T 7714	陈婷婷,段旭,赵洋毅,等. 红河干旱河谷区典型地类植物根系特征对土壤大孔隙的影响[J],2020,27(6):107-115.
APA	陈婷婷,段旭,赵洋毅,冷鹏,邵一敏,&杜云祥.(2020).红河干旱河谷区典型地类植物根系特征对土壤大孔隙的影响.水土保持研究,27(6),107-115.
MLA	陈婷婷,et al."红河干旱河谷区典型地类植物根系特征对土壤大孔隙的影响".水土保持研究 27.6(2020):107-115.