论文部分内容阅读
为探明辽宁省森林土壤与植物中钙元素的空间分布特征,选择3种典型树种(油松,樟子松和柞树)为研究对象,在系统的野外调查和土壤及叶片(针叶)采集与测试基础上,采用统计对比和相关性分析方法对土壤水溶性钙和植物叶片全钙含量的东西向分布特征及土壤与植物叶片钙元素的相关性进行了研究。结果表明:辽东与辽西森林土壤间水溶性钙含量有较大差异,辽西表层和亚表层土壤水溶性钙含量分别为0.037~0.072 g kg-1和0.047~0.078 g kg-1;辽东表层和亚表层土壤水溶性钙含量分别为0.025~0.039 g kg-1和0.019~0.038 g kg-1。相应地它们的植物叶片全钙含量也有较大的差异,辽西和辽东分别在4.663~10.156 g kg-1和2.436~2.700 g kg-1之间。辽西林地土壤水溶性钙含量与植物叶片中钙含量均高于辽东,由辽西至辽东呈下降趋势,这与降水量增加有关。3种树种林地植物叶片全钙含量与土壤水溶性钙含量均呈正相关(油松P<0.05,樟子松和柞树P<0.01)。
In order to explore the spatial distribution characteristics of calcium in forest soils and plants in Liaoning Province, three typical tree species (Pinus tabulaeformis, Pinus sylvestris var. Mongolica and Quercus acutissima) were selected as the research objects in field investigation and soil and leaf (needle) collection On the basis of the test and the test, statistical analysis and correlation analysis were used to study the distribution characteristics of soil water-soluble calcium and the total calcium content of plant leaves and the correlation between soil and plant calcium. The results showed that the content of water-soluble calcium in the soil between Liaodong and western Liaoning was quite different. The contents of water-soluble calcium in the surface and subsurface soil of Liaoxi were 0.037-0.072 g kg-1 and 0.047-0.078 g kg-1, respectively. The water-soluble calcium content of surface soil was 0.025-0.039 g kg-1 and 0.019-0.038 g kg-1, respectively. Correspondingly, the total calcium content of their plant leaves also has a greater difference, Liaosi and Liaodong respectively between 4.663 ~ 10.156 g kg-1 and 2.436 ~ 2.700 g kg-1. Soil water-soluble calcium content and plant leaf calcium content in the woodland of Liaoxi were higher than that of Liaodong and from Liaoxi to Liaodong, which was related to the increase of precipitation. There was a positive correlation between the total calcium content and soil water-soluble calcium content in the three tree species (Pinus tabulaeformis P <0.05, Pinus sylvestris var. Mongolica and Oak tree P <0.01).