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- Title
黄土丘陵区草本植物叶片与枯落物生态化学计量学特征.
- Authors
刘洋; 曾全超; 安韶山; 李鑫; 黄懿梅
- Abstract
This study was conducted in the forest, foreststeppe and steppe vegetation zones along the Yanhe River Basin, where the leaf and litter samples from four dominant herbaceous plants including Lespedeza davurica, Stipa bungeana, Artemisia sacrorum, Artemisia giraldii were taken. By measuring the concentrations of carbon (C), nitrogen (N), phosphorus (P) and potassium (K), we measured the concentrations and their ratios to explore the limit and resorption of nutrient in the herbaceous plants. The results showed that the leaf N/P of four herbaceous plants was all lower than 14, suggesting their growth was mainly limited by N content. Except for L. davurica, the mean nutrient resorption efficiency of K, N and P in the other three plants was 79.9%, 48.7% and 32.5%, respectively. The higher nutrient resorption efficiency and K concentration in the leaf were beneficial for soil water competition of A. sacrorum and A. giraldii. The litter C/N in A. sacrorum was significantly lower than that in S. bungeana and A. giraldii, which was easy to decompose to benefit the nutrient recycling. This resulted in the wide distribution of A. sacrorum in the three vegetation areas.
- Publication
Yingyong Shengtai Xuebao, 2017, Vol 28, Issue 6, p1793
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.201706.036