论文部分内容阅读
对华北平原大兴县 1 982— 2 0 0 0年两个时段大量土壤样本的分析结果表明 ,土壤养分含量与土壤质地表现出明显的一致性 ,体现了土壤质地越重 ,养分含量越高的特点 ;土壤质地对土壤养分含量的影响 ,1 982年的大于 2 0 0 0年的 ;但 2 0年来 ,由于土地利用集约度的增强 ,质地对土壤养分水平的影响渐趋减弱 ,不同质地土壤的养分水平渐趋一致
The analysis of a large number of soil samples from 1982 to 2000 in Daxing County, North China Plain shows that soil nutrient content is obviously consistent with soil texture, which reflects the characteristics of heavier soil texture and higher nutrient content The effect of soil texture on soil nutrient content was larger than that in 2000, but in 20 years, the effect of soil texture on soil nutrient level was weakened due to the intensification of land use intensity. Nutrient levels become more consistent