American Elm Site-Index Growth Curves
American Elm Site-Index Growth Curves
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美国榆树站点指数增长曲线
DOI：
10.2307/3628154
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
K. Lynch
中科院分区：
文献类型：
--
作者：
W. Geyer;K. Lynch
根据1964-1965年堪萨斯森林资源清查中收集的数据，建立了评价美国榆树在堪萨斯天然用材林中生长潜力的立地指数曲线。美国榆（Ulmus americana L.）是堪萨斯最常见的本土榆树。木材主要用于农业工具，桶，家具和托盘（斯蒂芬斯，1969年）。它生长在排水良好，肥沃的洼地土壤，并在其分布区的西部，它发生在沿着水道与boxelder，绿色灰，和棉白杨（哈洛和Harrar，1950年）。美国榆树几乎可以在其分布范围内的所有土壤类型上找到（Fowells，1965）。它在堪萨斯的总现存生物量中排名第三，收获广泛，但荷兰榆树病的自然死亡率很高（Raile和Spencer，1984年）。评价林地生产力（一个地区的木材生产潜力）是从林地获得最大利益的管理的一个重要方面。立地指数法是确定立地质量的最广泛接受的方法。它使用树高/年龄的关系，这与木材产量相关。根据定义，立地指数是在完全蓄积、同龄林分中，50年龄的优势/共优势（上层）树木的平均高度。美国已公布了许多商业树种的曲线或表格（Carmean等人，1989年）。立地质量最好由当地立地指数曲线确定。在堪萨斯，只有黑胡桃（Juglans nigra L.），朴树（朴树L.），和绿色水曲柳（Fraxinus pennaciica L.）已发表（分别为盖耶和林奇，1987年;林奇和盖耶，1988年;以及盖耶和林奇，1990年）。本文的目的是为堪萨斯的自然林分中重要树种提供一系列地位指数方程、曲线和高度表中的另一个。
Site-index curves for evaluating the growth potential of American elm in native timber stands in Kansas were developed from data gathered in the 1964-1965 Kansas forest inventory. American elm (Ulmus americana L.) is the most common native elm found in Kansas. The wood is used principally for agricultural implements, barrels, furniture, and pallets (Stephens, 1969). It grows best on better drained, rich bottomland soils, and in the western portion of its range, it occurs along watercourses with boxelder, green ash, and cottonwood (Harlow and Harrar, 1950). American elm can be found on nearly all soil types within its range (Fowells, 1965). It ranks third in total standing biomass in Kansas and is harvested extensively, but experiences very high natural mortality from Dutch elm disease (Raile and Spencer, 1984). Evaluation of site productivity (wood-producing potential of an area) is an important aspect of management for attaining maximum benefits from forest lands. The site-index method is the most widely accepted means for determining site quality. It uses tree height/age relationships, which correlate well with timber yields. By definition, site index is the average height at age 50 years of dominant/codominant (overstory) trees in a fully stocked, evenaged stand. Curves or tables have been published for many commercial tree species in the United States (Carmean et al., 1989). Site quality is best determined by local site index curves. In Kansas, only curves for black walnut (Juglans nigra L.), hackberry (Celtis occidentalis L.), and green ash (Fraxinus pennsylvanica L.) have been published (Geyer and Lynch, 1987; Lynch and Geyer, 1988; and Geyer and Lynch, 1990, respectively). The purpose of this paper is to provide another in a series of site-index equations, curves, and height tables for important tree species growing in natural stands in Kansas.