Responses to defoliation in Holcus lanatus, Lolium perenne, and Trifolium repens from three different-aged pastures
Responses to defoliation in Holcus lanatus, Lolium perenne, and Trifolium repens from three different-aged pastures
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三种不同龄牧场的长毛黑麦草、多年生黑麦草和白三叶草对落叶的反应
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
R. Turkington
中科院分区：
文献类型：
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作者：
L. Aarssen;R. Turkington
研究了去叶对绒毛木生物量分配的影响，多年生黑麦草，和三叶草（Trifolium repens L.）从三个不同年龄的牧场收集的。克隆个体植物，并在1年的时间内对来自每个克隆的分株进行修剪和未修剪处理。在每个物种的未修剪处理中，来自三个牧场的植物在克隆生长的程度上没有差异（即，分蘖或匍匐茎生产）。然而，在修剪治疗，植物从最古老的牧场表现出显着更广泛的克隆生长比植物从年轻的牧场。随着放牧年龄的增加，有一个显着的趋势，增加补偿性克隆生长，以响应所有三个物种的落叶。这可能被解释为放牧选择压力的结果。然而，这些数据并不表明，草食动物的关系是一个互惠共生。其他解释被认为是。
The effects of defoliation on biomass distribution were studied in plants of Holcus lanatus L., Lolium perenne L., and Trifolium repens L. collected from three different-aged pastures. Individual plants were cloned and ramets from each clone were subjected to clipped and unclipped treatments over a period of 1 year. In the unclipped treatment for each species, plants from the three pastures showed no differences in the extent of clonal growth (i.e., tiller or stolon production). In the clipped treatment, however, plants from the oldest pasture displayed significantly more extensive clonal growth than plants from the younger pastures. With increasing pasture age, there was a significant trend of increasing compensatory clonal growth in response to defoliation for all three species. This may be interpreted as a consequence of selection pressure from grazing. However, the data do not suggest that the grass–grazer relationship is a mutualism. Alternative interpretations are considered.