降水量下限引种区沙地樟子松幼林种群树高分布偏斜度和不整齐性

应用生态学报 ›› 2002, Vol. ›› Issue (1): 6-10.

降水量下限引种区沙地樟子松幼林种群树高分布偏斜度和不整齐性

赵文智¹, 刘志民¹, 常学礼²

1. 中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室, 兰州 730000;
2. 烟台师范大学, 烟台 264025

收稿日期:2000-08-28 修回日期:2000-11-01
通讯作者: 赵文智,男,1966年生,博士,副研究员,从事恢复生态学和生态水文学方面研究,发表论文40余篇.E-mail:zhaowzh@ns.lzb.ac.cn
基金资助:
中国科学院寒区旱区环境与工程研究所知识创新项目(210049);国家重点基础研究发展规划资助项目(G1999043404)

Skewness and inequality of height distribution of young Pinus sylvestris varmongolica stands introduced on sandy soil with lower limited precipitation for tree survival and normal growth

ZHAO Wenzhi¹, LIU Zhimin¹, CHANG Xueli ²

1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000;
2. Yantai Normal University, Yantai 264025

Received:2000-08-28 Revised:2000-11-01

摘要/Abstract

摘要： 对降水量下限引种区沙地樟子松自然稀疏前人工林种群树高分布偏斜度和不整齐性的研究表明,种群高生长的不整齐性和分布的不对称性在林分自疏前随着林分发育而下降;造成高生长不整齐性变化的因素主要有年龄、初始生长状况、种群密度、对土壤水分的竞争和沙丘部位的差异;沙丘部位对林分不整齐性的影响作用要大于密度.

关键词: 樟子松, 高生长, 不整齐性, 偏斜度, 邻体竞争, 麦后直播棉, 施氮量, 钾吸收利用, 产量

Abstract: Based on the investigation of a transect (20m wide and 80 m long) along a gradient (bottom,middle,and top) of a dune,whose height was about 5～10m,the population dynamics in young Pinus sylvestis var.mongolica stands was studied.The results showed that both skewness and height inequality declined before the self-thinning process occurred.Age,initial growth status,density of the population,and neighborhood competition were the main factors affected height inequality.The location at sand dune was also an important factor,and its effect was more obvious than that of density.

Key words: Pinus sylvestris varmongolica, Height growth, Skewness, Inequality, Neighborhood competition, nitrogen application rate, potassium uptake and utilization, yield, direct-seeded cotton after wheat harvest

中图分类号:

S718.54

赵文智, 刘志民, 常学礼. 降水量下限引种区沙地樟子松幼林种群树高分布偏斜度和不整齐性[J]. 应用生态学报, 2002, (1): 6-10.

ZHAO Wenzhi, LIU Zhimin, CHANG Xueli . Skewness and inequality of height distribution of young Pinus sylvestris varmongolica stands introduced on sandy soil with lower limited precipitation for tree survival and normal growth[J]. Chinese Journal of Applied Ecology, 2002, (1): 6-10.

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