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施肥是美国东南方常用的一种提高森林生产率的营林措施。至1987年,几乎有50万公顷的火炬松和30万公顷的湿地松都施了肥。肥料对树干生长的反应,一般应用与树木大小有关的材积和重量常规回归方程进行估测。在很多时候,这些方程不考虑树形。因此,如果肥料对树干各部分的生长有着不同的分布作用,这些方程就可能导致估测不精确。控制树干形状发育的因素已被作为一个重要的题材进行研究。争论的结果认为可能包含了许乡复杂的相互作用。例如,遗传和环境的影响以及不同
Fertilization is a commonly used forest management measure in the southeastern United States to increase forest productivity. By 1987 almost 500,000 hectares of loblolly pine and 300,000 hectares of Pinus elliottii had been fertilized. The response of the fertilizer to the growth of the tree trunk is generally estimated using a general regression equation of volume and weight related to the size of the tree. In many cases, these equations do not consider the tree. Therefore, if fertilizers have different distributional effects on the growth of various parts of the trunk, these equations can lead to inaccurate estimates. The factors that control the development of the trunk shape have been studied as an important topic. The result of the argument is that it may involve complex interactions. For example, genetic and environmental impacts and differences