Thompson Ken, Parkinson John A, Band Stuart R, Spencer Rita E
NERC Unit of Comparative Plant Ecology, Department of Animal and Plant Sciences, The University, Sheffield S10 2TN, UK.
Institute of Terrestrial Ecology, Merlewood Research Station, Grange-over-Sands, Cumbria LA11 6JU, UK.
New Phytol. 1997 Aug;136(4):679-689. doi: 10.1046/j.1469-8137.1997.00787.x.
Mineral nutrient concentrations were determined in leaves of 83 mostly herbaceous species collected from central England. Most samples were analysed for N, P, K, Ca, Mg, Na, Fe, Al, Mn, Cu and Zn. Concentrations of K, N and P showed similar levels of interspecific variability, with the highest concentrations being 6-9 times the lowest. Mg and (especially) Ca were much more variable, with the highest concentrations being 24 and 49 times the lowest respectively. Only in the case of P concentration was the majority of the variance in the data found at or below the species level. Most of the variance in Ca and Mg concentrations was between monocots and dicots. Concentrations of N and P were strongly positively correlated with each other. Only Ca and Mn were consistently associated with soil pH, positively and negatively respectively. Dicots tended to accumulate more Ca and Mn from high soil concentrations than did monocots. Concentration of P was significantly positively correlated with maximum potential relative growth rate. Plants of woodland and arable habitats contained high concentrations of P, and those of pasture and skeletal habitats contained low concentrations of P. The P: N ratio was higher in plants of arable habitats. Species with P-rich leaves tended to be currently increasing in abundance. The results suggest that plants with nutrient-rich foliage grow quickly, dominate nutrient-rich ecosystems and are generally increasing as a result of the eutrophication and disturbance arising from human exploitation.
测定了从英格兰中部采集的83种主要草本植物叶片中的矿质养分浓度。大多数样本分析了氮、磷、钾、钙、镁、钠、铁、铝、锰、铜和锌。钾、氮和磷的浓度表现出相似的种间变异水平，最高浓度是最低浓度的6 - 9倍。镁和（尤其是）钙的变异大得多，最高浓度分别是最低浓度的24倍和49倍。只有磷浓度的数据大部分变异出现在物种水平及以下。钙和镁浓度的大部分变异存在于单子叶植物和双子叶植物之间。氮和磷的浓度彼此呈强正相关。只有钙和锰分别始终与土壤pH呈正相关和负相关。双子叶植物比单子叶植物更倾向于从高土壤浓度中积累更多的钙和锰。磷浓度与最大潜在相对生长速率显著正相关。林地和耕地生境的植物含磷量高，而牧场和瘠薄生境的植物含磷量低。耕地生境植物的磷：氮比值更高。叶片富含磷的物种目前数量趋于增加。结果表明，叶片富含养分的植物生长迅速，在养分丰富的生态系统中占主导地位，并且由于人类开发导致的富营养化和干扰，其数量总体上在增加。
