Intraspecific regulation of populations of the clonal herb, Cyperus esculentus
Intraspecific regulation of populations of the clonal herb, Cyperus esculentus
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克隆草本植物香附 (Cyperus esculentus) 种群的种内调控
DOI：
10.2307/2403997
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发表时间：
1987
影响因子：
5.7
通讯作者：
D. H. S. Drennan
中科院分区：
文献类型：
--
作者：
J. Lapham;D. H. S. Drennan
(1)在津巴布韦哈拉雷附近的一个地点进行了竞争对香附分株种群影响的实验研究。通过种植1~10000个块茎m~(-2)实现了一定范围的分株密度。分株生长最多的时间是10月至4月，这是主要的雨季，随着土壤干燥，分株在5月和6月死亡。(2)新的分株和块茎的产生与密度有关。块茎生产对竞争的反应是补偿性的，但块茎生产主要受高密度的限制。分株死亡率受气候条件的影响大于竞争。(3)生物量在生长后的几个月内达到峰值。每个种植分株的生物量与种植分株密度的对数/对数回归的斜率约为1就表明了这一点。(4)几个生活分株种群的分株重与分株密度之间的关系接近并短暂地遵循3/2自疏线，直到干燥和凉爽的天气增加了分株死亡。
(1) The influence of competition on ramet populations of Cyperus esculentus was studied experimentally at a site near Harare, Zimbabwe. A range of ramet densities was achieved by planting one to 10 000 tubers m-2. Ramet growth was most prolific from October to April, the main rainy season, with ramets dying off during May and June as soils dried. (2) Production of new ramets and tubers was density-dependent. Ramet production responded to competition in a compensatory manner but tuber production was mainly restricted at high densities. Ramet mortality was more affected by climatic conditions than by competition. (3) Biomass peaked within a few months of growth. This was shown by the slope of approximately 1 of the loglo/loglo regression of biomass production per planted ramet on planted ramet density. (4) The relationship between loglo weight and logl0 density for several populations of living ramets approached and briefly followed the 3/2 self-thinning line until dry and cooler weather increased ramet deaths.