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通过实地调查和采样,结合室内分析,研究了当地四种土地利用方式(果园、林地、草地、坡耕地)下土壤有机碳分布特征。结果表明:流域内所有土样土壤有机碳(SOC)含量的均值为13.13g.kg-1。其中,坡耕地的土壤有机碳均值为12.93g.kg-1,与坡耕地相比,果园土壤有机碳均值(12.97g.kg-1)略有升高;草地和林地分别比坡耕地高3.4和1.16%。林地、草地、坡耕地和果园的土壤有机碳均值无显著差异。各种方式下的土壤有机碳和含水量均有较强的线性相关性。根据实验数据和野外实地调研结果看出,本区林地和草地土壤的固碳能力强于果园和坡耕地,为当地水土流失治理提供了一定的科学依据。
Through field investigation and sampling, combined with indoor analysis, the distribution characteristics of soil organic carbon under the four land use types (orchard, woodland, grassland and sloping farmland) were studied. The results showed that the mean value of soil organic carbon (SOC) of all soil samples in the basin was 13.13g.kg-1. Among them, the mean value of soil organic carbon was 12.93g.kg-1 in sloping farmland, and the average value of organic carbon in the orchard was slightly higher than that in sloping farmland (12.97g.kg-1); the grassland and forest land were 3.4 And 1.16%. There was no significant difference in soil organic C between forest land, grassland, sloping farmland and orchard. There was a strong linear correlation between soil organic carbon and water content in various ways. According to the experimental data and field investigation, we can see that the carbon sequestration of forestland and grassland in this region is stronger than that of orchards and sloping fields, which provides some scientific evidences for local soil and water loss control.