Genetic variation and productivity of Populustrichocarpa and its hybrids. II. Biomass production in a 4-year plantation
Genetic variation and productivity of Populustrichocarpa and its hybrids. II. Biomass production in a 4-year plantation
复制标题
DOI：
10.1139/x85-061
复制
发表时间：
1985-04
影响因子：
2.2
通讯作者：
P. Heilman;R. Stettler
中科院分区：
文献类型：
--
作者：
P. Heilman;R. Stettler
在华盛顿西部的一个种植园地点，比较了来自10个源种群的5个黑棉白杨无性系（共50个无性系）的生产力。源种群位于喀斯喀特山脉以西，在俄勒冈州中部和不列颠哥伦比亚省南部之间。大多数源林代表主要河谷的种群。根据上级形态和生长速率选择单个克隆。种植间距为1.2 × 1.2 m（6944株·ha−1），4年后收获树木。死亡率，高度和生产力的相当大的变化，发现克隆内的个人立场和立场之间。西南克隆通常更有成效。4年生个体无性系的平均高度在8.5 ~ 11.8米之间。黑棉白杨无性系的平均干重产量为12.5 Mg·ha−1·year−1，单个无性系的干重产量在5.2和23.1 Mg·ha−1·year−1之间变化。试验中种植的3个新杨×美洲黑杨杂交种的产量普遍高于黑杨。
Productivities of 5 black cottonwood clones from each of 10 source populations (50 clones in total) were compared at one plantation site in western Washington. The source populations are located west of the Cascade Mountains, between central Oregon and southern British Columbia. Most source stands represented populations in major river valleys. Individual clones were selected for superior form and growth rate. Spacing was 1.2 × 1.2 m (6944 stems•ha−1) and trees were harvested after 4 years. Considerable variation in mortality, height, and productivity were found among clones within individual stands and among stands. Southwestern clones were generally more productive. Heights of individual clones averaged between 8.5 and 11.8 m at 4 years. Average dry weight production of black cottonwood clones was 12.5 Mg•ha−1•year−1 and varied between 5.2 and 23.1 Mg•ha−1•year−1 for individual clones. Three new Populustrichocarpa × P. deltoides hybrids planted in the trial were generally more productive than black cott...