LONG-TERM RESPONSES OF STEM GROWTH AND LEAF-AREA TO THINNING AND FERTILIZATION IN A DOUGLAS-FIR PLANTATION
LONG-TERM RESPONSES OF STEM GROWTH AND LEAF-AREA TO THINNING AND FERTILIZATION IN A DOUGLAS-FIR PLANTATION
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DOI：
10.1139/x84-118
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发表时间：
1984-01-01
影响因子：
2.2
通讯作者：
REID, P
中科院分区：
文献类型：
--
作者：
BINKLEY, D;REID, P
在一个53岁的道格拉斯冷杉种植园，重复间伐和施肥小区进行了检查，在茎生长，叶面积和茎生长每单位叶面积的反应。虽然测量发生20-30年后，情节安装，从各种治疗水平的实质性影响仍然存在。间伐减少了林分的叶面积，但增加了每单位叶面积的茎生长，导致在5年的测量期间（1977-1981年）每公顷茎生长的差异不大。施肥增加了单位叶面积的林分叶面积和茎生长量，每公顷5年茎生长量增加了一倍以上。考虑到叶面积和茎生长每单位叶面积的作用，在确定立场的治疗反应可能占很大的变化之间发现重复治疗或不同地点的研究。
Within a 53-yr-old Douglas-fir plantation, replicated thinning and fertilization plots were examined for responses in stem growth, leaf area and stem growth per unit leaf area. Although measurements occurred 20-30 yr after plot installation, substantial effects from the various treatment levels were still present. Thinning reduced leaf area of the stands but increased stem growth per unit of leaf area, resulting in little difference in stem growth per hectare over the 5-yr measurement period (1977-1981). Fertilization increased both stand leaf area and stem growth per unit leaf area, and more than doubled 5-yr stem growth per hectare. Consideration of the role of leaf area and stem growth per unit leaf area in determining stand treatment responses may account for much of the variation found among replicates of treatments or between studies on different sites.