Bryophyte biomass and species richness on the Park Grass Experiment, Rothamsted, UK
Bryophyte biomass and species richness on the Park Grass Experiment, Rothamsted, UK
复制标题
英国洛桑公园草地实验中的苔藓植物生物量和物种丰富度
作者：
R. Virtanen;A. Johnston;M. Crawley;G. Edwards
在英国罗瑟姆斯特德的公园草实验中，分析了硬叶植物生物量和物种丰富度与土壤pH值、养分施用量和维管植物生物量和物种丰富度之间的关系。该研究调查了与长期施肥和石灰施用以及最近在某些地块上停止施肥有关的硼镁石丰度。随着土壤pH值的增加，在一个地块上存在苔藓的概率增加，在土壤pH值为3.3-4.5的地块上，本实验中的最低值，几乎没有苔藓存在。随着维管植物生物量和维管植物丰富度的增加，总生物量下降。苔藓植物生物量和物种丰富度均对土壤pH值呈曲线响应。施氮后，苔藓植物生物量显著增加。的常见brathte物种的丰度表现出个体化的治疗反应。氮对芸香状短囊藓的丰度有负影响。提高土壤pH值和磷、钾配施对延长阔嘴兰的生长有积极影响。该物种也受到N的负面影响，但比B耐受更大量的N（100-150 kg ha−1 N）。芜菁一种短命的苔藓，真藓，土壤pH值的单峰响应，但没有表现出响应N，P，K或其他解释变量。
The relationships between bryophyte biomass and species richness and soil pH, nutrient applications and vascular plant biomass and species richness were analyzed for the Park Grass Experiment (Rothamsted, UK). The study examined the abundance of bryophytes in relation to long-term fertilizer and lime application and to fertilizer treatments recently being ceased on some plots. The probability of bryophytes being present on a plot increased with increasing soil pH, and on plots at soil pH 3.3–4.5, the lowest values in this experiment, there were virtually no mosses present. Total bryophyte biomass decreased with increasing vascular plant biomass and vascular plant richness. Both bryophyte biomass and species richness showed a curvilinear response to soil pH. Bryophyte biomass was markedly increased on plots where nitrogen (N) fertilization had recently been ceased. The abundance of the common bryophyte species showed individualistic responses to treatments. N had a negative effect on the abundance of Brachythecium rutabulum. Increasing soil pH, and the application of phosphorus (P) and potassium (K) fertilizer together, had a positive effect on Eurhynchium praelongum. This species was also negatively affected by N, but tolerated larger amounts of it (100–150 kg ha−1 N) than B. rutabulum. An ephemeral moss, Bryum subapiculatum, had a unimodal response to soil pH but showed no response to N, P, K or other explanatory variables.