貴州喀斯特峰叢洼地石漠化區(qū)土壤物理特征時(shí)空分異
[Abstract]:Karst peak cluster depression occupies the second place in 8 rocky desertification control areas (3.1 million hm~2) in China. Guizhou is the most serious rocky desertification area in China. The high heterogeneity of karst habitat and the discontinuity of soil lead to the difference of soil physical characteristics and water holding capacity. In order to find out the spatial and temporal differentiation of soil physical characteristics in karst peak cluster rocky desertification area, the soil samples from different seasons and different landforms in Guizhou karst peak cluster depression were sampled by using ring knife method. The results showed that: (1) the physical characteristics of soil showed great spatial and temporal differentiation, except for a small number of weak variations, all of them showed moderate variability, which was complex with the habitat type. The results showed that: (1) the physical characteristics of soil were different in time and space, except for a small number of weak variations. (2) soil physical characteristics of different slopes were not significant, but soil physical characteristics varied with seasons (spring, summer, autumn, winter) in different landforms (upper, middle, downhill). (3) under different vegetation types, In addition to non-capillary porosity, the physical characteristics of soil natural water content are extremely significant. The soil was looser and better in the distribution area of shrub and plantations, but the soil viscosity and permeability were relatively poor in coniferous forest or barren grassland.
【作者單位】: 貴州科學(xué)院貴州省山地資源研究所;貴州科學(xué)院貴州省植物園;貴州師范學(xué)院;
【基金】:國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目[2016YFC050260404] 貴州省科技計(jì)劃項(xiàng)目(黔科合支撐[2016]2525號(hào)) 貴州省科學(xué)技術(shù)基金項(xiàng)目(黔科合J[2013]2236號(hào)) 貴州省重大應(yīng)用基礎(chǔ)項(xiàng)目(黔科合JZ字[2014]200208) 廣州市產(chǎn)學(xué)研協(xié)同創(chuàng)新重大專項(xiàng)[201604020006] 貴州省農(nóng)業(yè)攻關(guān)項(xiàng)目[黔科合NY字(2012)3025]
【分類號(hào)】:S152
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