Physiological responses of big sagebrush to different types of herbage removal.
Physiological responses of big sagebrush to different types of herbage removal.
复制标题
大艾草对不同类型除草的生理反应。
DOI：
10.2307/3894891
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发表时间：
1960
期刊：
影响因子：
--
通讯作者：
L. A. Stoddart
中科院分区：
文献类型：
--
作者：
C. Cook;L. A. Stoddart
研究处理不同强度的人工去除牧草从浏览植物总是带来的问题，如何选择材料被收获。它应该是一个规定的百分比，每枝，总长度或重量的基础上，或它应该是一个规定的百分比，目前的总增长的植物。在后一种情况下，只要收获了整个枝条的近似预定百分比，那么每根枝条被收获多少或枝条位于植物上的何处就无关紧要。在1956年春天，在犹他州中部的沙漠山艾树类型，一项研究开始，以确定如何大山艾树（蒿）响应两种不同类型的牧草去除。在两个地点的每一个，10对植物被永久标记用于研究。每对植物中的一株植物通过去除整个植物上每株植物当前生长的一半来收获;另一株植物通过仅从植物的一半去除所有当年生长来收获。因此，开始时，在每个处理下从每个植物中除去大约相等重量的牧草。三年来，每年春天，大约在3月1日，就在活跃的春季生长明显之前，这些植物被收获。
Studies dealing with various intensities of artificial removal of herbage from browse plants always bring up the problem of how to select the material to be harvested. Should it be a prescribed percentage of each twig, based upon total length or weight; or should it be a prescribed percentage of the total current growth present on the plant. In the latter case, it would not matter how much of each twig was harvested or where the twig was located on the plant as long as the approximate predetermined percentage of the whole was harvested. During the spring of 1956, on desert sagebrush types of central Utah, a study was initiated to determine how big sagebrush (Artemisia tridentata) responded to two different types of herbage removal. At each of two locations, ten pairs of plants were permanently marked for study. One plant of each pair was harvested by removing one-half of the current growth of each ttiig over the entire plant; the other was harvested by removing all of the current year’s growth from only one-half of the plant. Thus, to begin with, approximately equal weight of herbage was removed from each plant under each treatment. The plants were harvested each spring for three years, about March 1, just before active spring growth was apparent.