CAJ | 학술논문

不同植被类型对于陆地生态系统的水分循环具有重要的调节作用。以晋西北黄土丘陵区偏关县境内的小叶杨林地、柠条林地、草地和撂荒地4种植被类型为研究对象，采用土钻法分别测定0～600 cm不同土层的土壤水分含量，分析了晋西北不同植被类型的土壤水分含量的垂直分布特征及4种植被含水量的差异比较。结果表明：（1）在0～600 cm 土层中，平均土壤水分含量因植被类型不同表现显著差异（p＜0.05），依次表现为小叶杨＞草地＞撂荒地＞柠条；（2）在0～600 cm土层中，土壤水分含量随着土层深度的增加呈现先逐渐降低后趋于稳定的趋势，且同一植被类型不同土层深度间土壤水分含量差异显著（p＜0.05），同一土层不同植被类型间的土壤水分含量也有显著差异（p＜0.05）；（3）研究区土壤剖面可分为易变层（0～100 cm）、活跃层（100～200 cm）、次活跃层（200～300 cm）和相对稳定层（300～600 cm）。在晋西北黄土丘陵区植被恢复中，应根据本区域土壤水分变化特点，选择适宜的植物种类，采取乔-草或乔-灌-草相结合的植被配置模式，以减少该区域土壤水分的过度消耗，这对于改善当地植被的生态效益具有重要意义。
불동식피류형대우륙지생태계통적수분순배구유중요적조절작용。이진서북황토구릉구편관현경내적소협양임지、저조임지、초지화략황지4충식피류형위연구대상，채용토찬법분별측정0～600 cm불동토층적토양수분함량，분석료진서북불동식피류형적토양수분함량적수직분포특정급4충식피함수량적차이비교。결과표명：（1）재0～600 cm 토층중，평균토양수분함량인식피류형불동표현현저차이（p＜0.05），의차표현위소협양＞초지＞략황지＞저조；（2）재0～600 cm토층중，토양수분함량수착토층심도적증가정현선축점강저후추우은정적추세，차동일식피류형불동토층심도간토양수분함량차이현저（p＜0.05），동일토층불동식피류형간적토양수분함량야유현저차이（p＜0.05）；（3）연구구토양부면가분위역변층（0～100 cm）、활약층（100～200 cm）、차활약층（200～300 cm）화상대은정층（300～600 cm）。재진서북황토구릉구식피회복중，응근거본구역토양수분변화특점，선택괄의적식물충류，채취교-초혹교-관-초상결합적식피배치모식，이감소해구역토양수분적과도소모，저대우개선당지식피적생태효익구유중요의의。
Various vegetations play important roles in regulating hydrological cycles of terrestrial ecosystems .Four types of vegetation namely Populus simonii forest, Caragana korshinskii forest, grass land and abandoned land in Pianguan county of Shanxi province were chosen as the study sites to measure the soil moisture content in 0~600 cm soil layer respectively , with the objectives to understand the soil moisture content conditions , vertical distributions and variations of different vegetation types in northwest Shanxi .The results were as follows:(1) In the 0~600 cm soil layer , the average content of soil moisture of the four vegetations is significantly different ( p<0.05 ) , showed the results of Populus simonii forest>grass land>abandoned land >Caragana korshinskii forest; (2) In the 0~600 cm soil layer , the soil moisture content decreases gradually and then goes stable as the soil depth increases . Significant differences of soil moisture content are shown in both the same vegetation type in different depths of soil and different vegetation types in the same depth of soil; ( 3 ) Soil profiles can be divided into four parts based on the actual situation of research plots: variable layers (0~100 cm), active layers (100 ~200 cm), sub-active layers (200~300 cm), and relatively stable layers (300~600 cm).Therefore, selection of appropriate plant species and adoption of vegetation configuration modes which combine tree-grass modes and tree-shrub-grass modes according to the characteristics of changes of soil moisture in this region are of great significance to guide vegetation construction in this region .