新疆准噶尔盆地典型荒漠区不同景观植被对土壤养分的影响

摘要/Abstract

摘要： 在群落演替的不同阶段,土壤与植被之间存在不同的互动关系。在新疆准噶尔盆地南缘,选择荒漠-绿洲交错区、沙漠边缘、沙漠腹地典型景观类型取样,监测不同景观条件下土壤水分、土壤有机质、全氮、全磷和植被盖度。结果表明,不同景观植被盖度、土壤水分、土壤养分含量存在显著的差异性（P<0.5）。土壤水分含量、植被盖度、土壤养分含量表现为荒漠-绿洲交错区＞沙漠边缘＞沙漠腹地的变化趋势;土壤含水量由荒漠-绿洲交错带10.4%递减到沙漠边缘5.8%、沙漠腹地3.5%;植被盖度、土壤养分含量随土壤类型由荒漠灰钙土向风沙土过渡,呈现显著的下降趋势。在相同土壤属性情况下,植被盖度与土壤有机质、土壤全氮之间存在显著的线性正相关关系,表明不同区域内植被在一定程度上影响土壤养分的积累。

关键词: 土壤含水量, 土壤有机质, 全氮, 全磷, 植被盖度, 空间异质性

Abstract: There are different interactive relations between soil and vegetation in different plant community succession stages. The variations of soil moisture, nutrients and vegetation cover in desert-oasis ecotone, desert edge, and desert hinterland were investigated in the southern edge of Junggar Basin in Xinjiang. The results show that vegetation coverage, soil moisture, and soil nutrient content are significantly different among different landscapes (P<0.05). Vegetation coverage, soil nutrient content represent an order of desert-oasis ecotone>desert edge> desert hinterland, and soil moisture content declines from desert-oasis ecotone (10.4%), desert edge (5.8%) , to desert hinterland (3.5%). The correlation analysis indicates that there is a significantly positive correlation between vegetation coverage and soil organic matter, total soil nitrogen for the same soil.

Key words: soil moisture, soil organic matter, total nitrogen, total phosphorus, vegetation coverage, spatial heterogeneity

中图分类号:

Q948.15

王晶;吕昭智*;钱翌;宋菁;钟晓英. 新疆准噶尔盆地典型荒漠区不同景观植被对土壤养分的影响[J]. 中国沙漠, 2010, 30(6): 1367-1373.

WANG Jing;L Zhao-zhi;QIAN Yi;SONG Jing;ZHONG Xiao-ying. Soil Nutrients under Vegetation Cover of different Desert Landscapes in Junggar Basin, Xinjiang[J]. JOURNAL OF DESERT RESEARCH, 2010, 30(6): 1367-1373.

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