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选取吉林省大黑山东西坡台地农田系统的12组土壤样品,采用常规分析的方法对土壤有机质、全N、速效N、全P、速效P和速效K进行测试。利用独立样本T检验和相关分析的方法对数据进行单因子和多因子的综合分析,探讨成土母质、水、热条件等因素对黑土养分变化的影响。结果表明:大黑山东西两侧台地上黑土养分差异明显,西坡较东坡黑土肥力高,东坡比西坡黑土退化严重。产生这种差异的原因与地形差异和人类干扰关联不大,主要和东西坡两侧的成土母质、地方气候的异质性相关。这一结论对从地方尺度研究交错带这一特殊区域黑土退化的本质有一定的指导意义,为更合理地利用黑土资源提供理论依据。
Twelve groups of soil samples from the Dongsipo slope farmland system in Daheishan, Jilin Province were selected to test the soil organic matter, total N, available N, total P, available P and available K by using routine analysis methods. Using independent sample T test and correlation analysis method, the data were comprehensively analyzed by single factor and multifactor, and the effects of soil parent material, water and heat condition on the nutrient change of black soil were discussed. The results showed that there was significant difference in nutrients in black soil between the east and west of Dahei Mountain. The fertility of black soil in the west slope was higher than that in the east slope, and the degradation of black soil in the west slope was more serious than in the west slope. The causes of this difference are not related to the differences of terrain and human disturbance, which are mainly related to the heterogeneity of parent material and local climate on both sides of the east and west slopes. This conclusion is of some guiding significance for the study of the nature of black soil degradation in this special region from the local scale, which provides a theoretical basis for making more rational use of black soil resources.