不同栽植类型下3种地被植物的养分浓度动态变化及相关性研究

Study on the Nutrient Concentration Dynamic Change and Correlation of 3 Ground Cover Plants under Different Planting Modes

选取生长状况良好的吉祥草、白三叶和鸢尾3种多年生草本等作为试验对象,根据林缘、林下等不同栽植类型,设置林缘鸢尾、林缘吉祥草、林缘白三叶、林下吉祥草、林下白三叶共5种模式。从2008年9月到2009年9月,分5次采样,并测定植物体K、Ca、Mg养分浓度。结果表明:(1)不同栽植类型下3种地被植物N、P、K、Ca、Mg平均养分浓度分别为22.81mg·g-1、2.98mg·g-1、31.40mg·g-1、51.41mg·g-1、9.69mg·g-1;(2)不同栽植类型下P与Ca、Ca与Mg养分浓度均表现出显著相关。

Well-growing perennial plants of Reineckia cornea, Trifolium repens and Iris tectorum were selected as the experiment objects. 5 planting modes were designed including Iris tectorum, Reineckia carnea and Trifolium repens planted at the forestmargin, Reineckia carnea and Trifolium repens planted under forest. 5 samplings of plants were made from September 2008 to September 2009 and the nutrient concentrations of K, Ca, Mg in the plants were determined. The results were as following：. 1. The mean nutrient concentrations of N, P, K, Ca, Mg in the 3 ground cover plants were 22.81mg·g-1,2.98mg·g-1, 31.40mg·g-1, 51.41 mg·g-1 and 9.69 mg·g-1 respectively; 2. Under different planting modes, the concentration of P showed significant correlation with that of Ca, and the concentration of Ca showed significant correlation with that of Mg.