青藏高原东北缘黄土区典型立地人工林分土壤水分特性研究  

Soil moisture characteristics of typical standing artificial forests in loess area of the northeastern Tibetan Plateau

作　　者：林莎 王莉 李远航 陈梦飞 贺康宁 LIN Sha;WANG Li;LI Yuanhang;CHEN Mengfei;HE Kangning(School of Soil and Water Conservation ,Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Engineering Research Center of Soil and Water Conservation , Emgineering Research Center of Forestry Ecological Engineering of Ministry of Education ,Beijing Forestry University ,Beijing 100083,China)

机构地区：[1]北京林业大学水土保持学院,水土保持国家林业局重点实验室/北京市水土保持工程技术研究中心/林业生态工程教育部工程研究中心,北京 100083

出　　处：《生态学报》2019年第18期6610-6621,共12页Acta Ecologica Sinica

基　　金：国家重点研发计划重点专项(2017YFC0504604)

摘　　要：为探讨青藏高原东北缘黄土区典型立地人工林分的土壤水分特性及耗水特性,本研究以青海云杉林地和祁连圆柏林地作为研究对象,对其土壤持水特性、土壤渗透特性、土壤水分动态和土壤耗水特性进行综合分析。研究结果表明:(1)在相同土壤水吸力作用下,青海云杉林地的持水性比祁连圆柏好,荒草地的持水性比林地差。(2)青海云杉林地的土壤渗透性总体优于祁连圆柏,荒草地的土壤渗透性最差。相同坡向,上坡位的土壤渗透性小于下坡位。(3)青海云杉林地土壤水分条件总体优于祁连圆柏,而荒草地土壤水分条件优于林地;半阴坡林地土壤含水量随坡位由上至下逐渐升高。(4)生长季期间,青海云杉林地平均耗水量大于祁连圆柏,而荒草地耗水量远小于林地。综上,青海云杉林地的土壤水分特性整体优于祁连圆柏林地,且二者的土壤水分状况都比较好,并未出现土壤干层、土壤水分过度消耗等现象,青海云杉和祁连圆柏在研究区的配置是合理的,可以作为当地的水源涵养树种。To investigate the characteristics of soil moisture and water consumption of typical standing artificial forests in the loess area of the northeastern margin of the Qinghai-Tibet Plateau, the Picea crassifolia and Juniperus przewalskii Kom. lands were examined in this study. A comprehensive analysis of their soil water-holding characteristics, soil permeability characteristics, soil moisture dynamics, and soil water consumption characteristics was performed. The results showed that:1) under the same soil water suction conditions, the water holding capacity of the P. crassifolia land was better than that of the J. przewalskii Kom. land, and the water holding capacity of the desert grassland was worse than that of the forest land;2) the soil permeability of the P. crassifolia land was generally better than that of the J. przewalskii Kom. land, and the soil permeability of the desert grassland was the worst. The soil permeability of the upper position was less than that of the lower position on the same slope;3) the soil moisture condition of the P. crassifolia land was better than that of the J. przewalskii Kom. land, and the soil moisture condition of the desert grassland was better than that of the forest land. The soil water content of the forest on the west-facing slopes gradually increased with a decrease in slope height;4) during the growing season, the average water consumption of the P. crassifolia land was more than that of the J. przewalskii Kom. land, whereas the water consumption of the desert grassland was much lower than that of the woodland. In summary, the soil moisture characteristics of the P. crassifolia land were better than those of the J. przewalskii Kom. land, and the soil moisture statuses for both of them were good. The phenomena of excessive soil water consumption and dry layer of soil were not observed. The configuration of P. crassifolia and J. przewalskii Kom. in the study area is reasonable and they can be used as tree species for local water conservation.

关 键 词：黄土区 土壤水分特性 林地耗水特性 

分 类 号：S714[农业科学—林学]