The growth of cocksfoot (Dactylis glomerata L.) under spaced plant and sward conditions.
The growth of cocksfoot (Dactylis glomerata L.) under spaced plant and sward conditions.
复制标题
鸡足（Dactylis glomerata L.）在间隔植物和草地条件下的生长。
DOI：
10.1071/ar9600457
复制
发表时间：
1960
影响因子：
1.9
通讯作者：
R. Knight
中科院分区：
文献类型：
--
作者：
R. Knight
比较了9个鸭茅无性系在两种间距条件下的累积生长情况。选择第一个间距是为了提供与育种苗圃相似的条件，第二个间距是为了提供与草地相似的条件。获得了两个生长季节的数据，每次收获时都考虑到单个植物及其部分。在9个无性系中，7个是从地中海地区获得的植物发展而来，2个来自英国。在两种间距条件下，植株之间的相关性很差，特别是在草的后期无性系对竞争的反应不同。竞争并没有导致草地上无性系的最高体重的统一。这些结果与类似研究的相互矛盾的结果以及基因型对影响生长的环境因素的反应有关。结果表明，植物在营养期受竞争的影响与生殖期不同。发现一些无性系在夏季休眠后的再生速度比其他无性系快，但最初的优势没有保持。植株部分的相对发育在不同的无性系之间存在差异，有些植株在地下的总重量占比很高。在繁殖时，尽管在两种间距条件下，一个无性系植株之间的总重量差异很大，但植株各部分的百分比非常相似。在夏季，北欧植物的两个无性系的死亡率很高，而地中海植物的死亡率可以忽略不计。
The cumulative growth of nine clones of Dactylis glomerata was compared under two conditions of spacing. The first spacing was chosen to provide conditions similar to those of a breeding nursery, the second, conditions met with in swards. Data were obtained for two growing seasons, the individual plant and its parts being considered at each harvest. Of the nine clones seven were developed from plants obtained from the Mediterranean region and two from Great Britain. There was a poor correlation between plants under the two spacing conditions, particularly as later in the life of the swards clones reacted differently to competition. Competition did not lead to a uniformity of top weight for the clones in the swards. These results are discussed in relation to the conflicting results of similar studies and the reaction of genotypes to factors of the environment affecting growth. It is suggested that plants in the vegetative phase are affected by competition differently from plants in the reproductive phase. Some clones were found to regenerate after summer dormancy more rapidly than others, but initial advantages were not maintained. The relative development of parts of the plants differed between clones, some having high proportions of their total weight below ground. At the time of reproduction, despite very large differences in total weight between plants of a clone under the two spacing conditions, the percentages of plant parts were very similar. A high mortality was shown during the summer by the two clones from northern European plants, but only a negligible mortality by the Mediterranean plants.