文献类型：期刊文献

中文题名：杉木中龄林施肥效应探讨

英文题名：Growth Response to Fertilization in a Middle-aged Plantation of Chinese Fir

作者：李贻铨[1] 陈道东[1] 纪建书[2] 李瑞成[2] 区晋祥[2] 黄罗华[2]

第一作者：李贻铨

机构：[1]中国林业科学研究院林业研究所;[2]中国林业科学研究院亚热带林业实验中心;

年份：1993

卷号：6

期号：4

起止页码：390-396

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心1992】；CSCD:【CSCD2011_2012】；

基金："七五"国家攻关专题"杉木人工林集约栽培技术研究"

语种：中文

中文关键词：杉木;中龄林;施肥;效应

外文关键词：Chinese fir, middle-aged plantation, fertilization, red-yellow soil

分类号：S791.270.6

摘要：亚热带丘陵黄红壤区杉木中龄林间伐后4年施肥试验表明,施肥当年效应不明显,第2、第3年N肥效应极显著。在蓄积量和胸径增长上,P肥有效、K肥效应低。树高对施肥反应不明显。P、K肥单施效应低于N、NP和NPK肥。两次施肥,每次施尿素263kg/hm^2或尿素263kg/hm^2+钙镁磷肥503kg/hm^2,胸径净生长量增加36％～48％,蓄积净生长量增加32％～48％,投入产出比为1:3.75～3.78。大、中径木肥效明显高于小径木。施肥前林分本底值对林木生长有极显著影响,干扰肥效,施肥前对林分进行下层疏伐,将本底值调整到同一水平进行分析检验,提高肥效。
A field trial on fertilization of thinned middle-aged plantation of Chinese fir on hilly red-yellow soil in subtropical area was conducted from 1987~1990. Tree increment of the first year didn't show any difference among treatments, bat the 2nd- and 3rd-year increment after fertilization indicated that N fertilizer increased tree growth the most significantly, P fertilizer significantly, and K unsignificantly; while the growth response to fertilizer was higher in volume and DBH than in height, and the growth response to P or K fertilizer was smaller than that to N, NP or NPK fertilizer. The net DBH and volume increment, resulting from the repeated application of 263 kg urea per ha or 263 kg urea plus 503 kg calcium magnesium per ha in 1987 and 1989, were promoted by 36%~48% and 32%~48%,and the value of input/output was 1:3.75~3.78,respectively. The effect of background diameter on the late growth responre to fertilization was also evaluated, the larger the background DBH before fertilization, the more remarkable the fertilization efficiency. Since the second thinning in winter of 1989, only N fertilizer could significantly increase the DBH growth of the trees, whose DBH was equal to or above the average background diameter. Since the background diameter of the trees had an influence on the late growth and fertilization efficiency, it should be regulated to a similar level by thinning from below before fertilization, which is helpful to the comparison and promotion of fertilization efficiency.