Defoliation as a factor in the growth of varieties of subterranean clover (Trifolium subterraneum L) when grown in pure and mixed swards
Defoliation as a factor in the growth of varieties of subterranean clover (Trifolium subterraneum L) when grown in pure and mixed swards
复制标题
落叶是各种地下三叶草（Trifolium subterraneum L）在纯草丛和混合草丛中生长时的一个因素
DOI：
10.1071/ar9630206
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发表时间：
1963
影响因子：
1.9
通讯作者：
J. Black
中科院分区：
文献类型：
--
作者：
J. Black
本文介绍了两个实验分析了地下三叶草品种在大种子箱在韦特农业研究所，阿德莱德草地落叶恢复。第一个试验检查了六个普通的商业品种从一次严重落叶中恢复的方式，并表明在这些条件下，它们可以被分为三类：亚鲁普和克莱尔是高大、高产的品种，有很少的大叶子，从落叶中恢复缓慢;塔拉鲁克和德瓦加纳普是匍匐的品种，产量较低，有许多小叶，在落叶后迅速恢复;巴克斯沼泽和巴克山在各方面都是中间地带。在第二个实验中，相等数量的亚鲁普和塔拉鲁克植物的混合草地在三种处理下生长：A，不落叶; B，在移除较高的亚鲁普树冠但留下较低的塔拉鲁克植物不受影响的高度落叶两次; C，在移除两个品种的树冠的高度落叶两次。每次脱叶后四次测量干重表明，在脱叶处理中，所有塔拉鲁克植物在实验结束时死亡。在脱叶处理中，去除亚鲁普树冠只会暂时改善塔拉鲁克植物生长的光照，并且它们的干重和植物数量逐渐下降。干重变化的塔拉鲁克组件被证明是依赖于光能提供给它，这反过来又决定了由光吸收能力的上级亚鲁普冠。在混合草地，能力的亚鲁普迅速重新建立一个以上的塔拉鲁克的树冠出现，以解释其成功时，落叶。
This paper describes two experiments analysing the recovery from defoliation of subterranean clover varieties grown in swards in large seed boxes at the Waite Agricultural Research Institute, Adelaide. The first experiment examined the way in which the six common commercial varieties recovered from a single severe defoliation, and showed that under these conditions they can be placed in three groups: Yarloop and Clare are tall, high-yielding varieties with few, large leaves, recovering slowly from defoliation; Tallarook and Dwalganup are prostrate varieties, lower-yielding, with many small leaves, recovering rapidly after defoliation; Bacchus Marsh and Mount Barker are intermediate in all respects. In the second experiment mixed swards of equal numbers of Yarloop and Tallarook plants were grown under three treatments: A, no defoliation; B, defoliated twice at a height which removed the higher Yarloop canopy but left the lower Tallarook plants untouched; C, defoliated twice at a height which removed the canopies of both varieties. Measurement of dry weight on four occasions after each defoliation showed that in the undefoliated treatment, all Tallarook plants died by the end of the experiment. In the defoliated treatments, the removal of the Yarloop canopy resulted in only a temporary improvement in the illuniination in which the Tallarook plants grew, and their dry weight and plant numbers progressively declined. Dry weight changes in the Tallarook component were shown to be dependent on the light energy available to it, which was in turn determined by the light-absorbing capacity of the superior Yarloop canopy. In mixed swards, the ability of Yarloop to re-establish quickly a leaf canopy above that of Tallarook appeared to explain its success when defoliated.