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为掌握不同生产力水平果园土壤水分的空间分布特征及其变异规律,利用经典统计学及地统计学的原理对黄土高原不同生产力水平果园土壤水分空间异质性进行了对比研究。结果表明:土壤含水量在垂直方向上以果树根系主要分布区为中心向上下两向递增,在水平方向,随着距树干距离的增大而增加;土壤水分稳定性随土层深度的增加及距树干距离的增加而提高。不同生产力水平果园间,土壤水分含量差异达到显著水平,随着果树生产力水平的降低,其对土壤水分的消耗逐渐减少、水分稳定性提高、因空间自相关部分引起的异质性增大,而随机部分引起的空间异质性程度减小。综上可知,进行果树生产力调控能够减少农业生产对资源的过度消耗,减轻对环境的影响。
To understand the spatial distribution and variation of soil moisture in orchards at different productivity levels, the spatial heterogeneity of orchard soil moisture at different productivity levels in the Loess Plateau was studied by using the principles of classical statistics and geostatistics. The results showed that the soil water content in the vertical direction increased mainly in the direction of the root distribution of fruit trees, and increased in the horizontal direction with the distance from the tree trunk. The stability of soil moisture increased with the depth of the soil layer and Increased distance from the trunk increases. The differences in soil water content reached significant levels among orchards at different productivity levels. With the decrease of fruit productivity, the soil water consumption decreased gradually, the water stability increased and the heterogeneity caused by the spatial autocorrelation increased Random part of the degree of spatial heterogeneity caused by reduced. In conclusion, the regulation and control of fruit tree productivity can reduce the excessive consumption of resources by agricultural production and reduce the impact on the environment.