Distribution patterns of main nutrients in three dominant shrubs in Karst mountainous areas in central Guizhou, China
The nutrient distribution patterns of three dominant shrubs and the relationships between plants and soils have been ex-mined in the shrubland and the shrub-and-grassland, which have been extensively distributed in mountainous area in Guihzou, China. The results showed that: (1) The N and K concentrations in leaves and fruits were significantly higher than that in stems and roots of three dominant shrubs. The P concentrations in fruits were markedly higher than that in the other organs. The Ca and Mg concentra-tions in leaves and stems were higher than that in the other organs. (2) In the shrub-and-grassland, there were significant differences in N:P ratios in stems and roots between three dominant shrubs, and the N:P ratios varied extensively among the three shrubs. In the shrubland, the N:P ratios varied extensively among the three shrubs. (3) The P concentrations were significantly related to available P contents in rhizospheric soils.The results indicated that the P would limit plants' growth and finally influence the biogeochemistry characteristics of the Karst ecosystems.
国家科技期刊平台
NSTL
万方数据
维普
