西藏昆仑山山口不同坡向不同海拔土壤物理性质分析
Vertical Zonality of Soil Physical Properties in Kunlun Mountain Pass, Xizang
本研究以青藏高原昆仑山山口区域南坡及北坡不同海拔的土壤为主要研究对象,通过在昆仑山口南北坡不同海拔取样,测定土壤物理性质,分析昆仑山口不同坡向不同海拔土壤物理性质变化特征,结果表明:1)在0 ~ 30 cm土层中,表层土的土壤容重更小,土壤更疏松,保水蓄水能力更强。2)在0 ~ 30 cm土层中,不同样地的土壤样品的毛管孔隙度随着海拔的上升而降低,山麓北坡不同样地的土壤样品的毛管孔隙度高于山麓南坡。3)在10 ~ 30 cm土层,山麓北坡不同样地的土壤含水量呈现出随海拔的上升而增加的趋势。山麓南坡,总体上呈现出低海拔的各层土壤含水量高于高海拔样地土壤样品的土壤含水量。4)不同样地相同土层的土壤饱和含水量,不同海拔样地的土壤样品的土壤饱和含水量均存在差异性。5)土壤通气性与海拔呈极显著相关。饱和含水量与海拔呈极显著相关。土壤毛管孔隙度、总孔隙度、通气性与土壤容重均呈显著负相关。饱和含水量、土壤毛管持水量与土壤容重呈极显著负相关。土壤的总孔隙度、土壤通气性、饱和含水量、土壤毛管持水量与土壤毛管孔隙度呈极显著正相关。土壤通气性、饱和含水量、土壤毛管持水量与土壤总孔隙度呈极显著正相关。土壤通气性与土壤含水量呈极显著负相关。饱和含水量、土壤毛管持水量与土壤通气性呈极显著正相关。
This study in the Qinghai-tibet plateau of the kunlun mountain pass area south slope and north slope of soil as the main research object, through the sampling of different altitude in the kunlun mountain pass area south slope and north slope, the determination of soil physical properties, analyze the characteristics of the soil, the results show that: 1) In 0 ~ 30 cm soil layer, surface soil capacity smaller, more loose soil, water storage capacity is stronger.2) In the soil layer of 0-30 cm, the porosity of different soil samples decreases with the elevation, and the porosity of different soil samples on the north slope is higher than that of the south slope of the foothills.3) In the 10 ~ 30 cm soil layer, the different soil water content on the north slope of the foothills shows a trend of increasing with the elevation. On the south slope of the foothills, the soil water content of each layer at low altitude was higher than that of the soil samples in the high altitude sample.4) Different soil saturated water content of the same soil layer, and the soil saturated water content of soil samples of different elevations were different.5) The negative correlation between soil aereration and altitude was highly significant. Saturated water content was positively correlated with elevation. Soil capillary porosity, total porosity, and ventilation and aeration was all significantly negatively correlated with volume weight of soil. The negative correlation between saturated water content and soil capillary water holding volume and soil bulk density was very significant. The total porosity, soil aerosity, saturated water content, and soil pipette water holding were positively associated with soil pipette porosity. Soil ventilation, saturated water content, soil capillary water holding and positively correlated with total soil porosity. The negative correlation of soil aeration was very significant with soil water content. The saturated water content and soil capillary water holding were positively correlated with soil aeration.
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西藏农牧学院创新人才队伍建设”项目(XZMNXYRCXM-2024-06)
第二次青藏高原综合科学考察研究(2019QZKK0405)
西藏农牧学院青年科研基金资助(NYQNKY2024-05)
西藏农牧学院第八批柔性引进人才项目(XZNMXYRXRC-2024-03)
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