关键词: 慈竹, 空间分布, 大量元素, 土壤肥力

Abstract: Abstract:【Objective】To explore nutrients spatial distribution in orgains and effect of soil fertilities to leaf nutrients of clustered bamboo, Neosinocalamus affinis was conducted as the research material.【Method】Most fertility of soil at surface floor was significantly higher than the deeper floor, higher acidity of soil was measured. Nutrients content in leaf, branch and stem of N. affinis, vertical structure distribution in leaf and soil fertilities in plots were conducted, the correlation and linear models inner leaf nutrients and with soil fertilities were represented in this paper.【Results】Fertility at surface layer was higher than deep layer. The orders of nitrogen and phosphorus in different organs were both leaf>stem>branch, potassium content was branch>leaf>stem, organic carbon was stem> leaf >branch, total content in different organs of 3-year –old was mostly higher to 1-2 years old in samples, total K in the three organs among different ages had significant difference, meanwhile, total P had an inverse proportion with growing age, but organic caborn had a direct relationship. The variation of leaf total P and organic carbon had a positive correlation along height. However, total K had a negative one, no significant difference of nutrients in various ages of bamboo with growing height. Nutrient factors in leaf of each age plant had more significant or highly significant correlations, but soil fertility factors had more non-significant negative effect to nutrients, except of total P in 3a plant, which was mainly affected by many kinds of nutrient factors, and total P and available N mainly effect to organic matter in 1a plant. 【Conclusion】Variation under time and space are calculated in leaf nutrition. In sufficient fertility condition, more remarkable effect is revealed among nutrients than fertility factors to their absorption.

Key words: Neosinocalamus affinis, spatial distribution, macroelement, soil fertiltiy