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›› 2013, Vol. 49 ›› Issue (1): 14-20.doi: 10.11707/j.1001-7488.20130103

• 论文 • 上一篇    下一篇

黄土高原柠条锦鸡儿灌木林生长的时空变异特征

程杰1, 王吉斌1, 程积民2, 罗宗宽3   

  1. 1. 国家林业局西北林业调查规划设计院 西安 710048;2. 中国科学院水利部水土保持研究所 杨凌 712100;3. 陕西省宁西林业局 户县 710300
  • 收稿日期:2011-11-17 修回日期:2012-10-30 出版日期:2013-01-25 发布日期:2013-01-25
  • 通讯作者: 程积民

Spatial-Temporal Variability of Caragana korshinskii Vegetation Growth in the Loess Plateau

Cheng Jie1, Wang Jibin1, Cheng Jimin2, Luo Zongkuan3   

  1. 1. Northwest Institute of Forest Inventory, Planning and Design, State Forestry Administration Xi'an 710048;2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources Yangling 712100;3. Forest Bureau of Ningxi of Shaanxi Huxian 710300
  • Received:2011-11-17 Revised:2012-10-30 Online:2013-01-25 Published:2013-01-25

摘要: 利用宁夏回族自治区固原水平阶整地和荒坡不整地种植23年生柠条锦鸡儿灌木林的连续定位监测资料,分析不同坡位柠条灌木林幼龄期(1~7年生)、中龄期(8~15年生)和老龄期(16~23年生)生长的时空变异特征。结果表明:柠条灌木林株高生长受坡位和整地方式的影响,柠条株高生长量在幼龄期表现为下坡>中坡>上坡,中龄期表现为上坡>中坡>下坡,水平阶与荒坡株高相比,从幼龄期到中龄期提高幅度为23.48%~45.33%,老龄期差异不显著;水平阶柠条锦鸡儿单株分枝数、地径、地上生物量和地下生物量比荒坡分别提高了26.79%~78.82%,37.50%~50.00%,3.50%~91.97%和19.59%~50.17%;柠条锦鸡儿灌木林生长过程均符合Logistic生长模型;对柠条锦鸡儿各生长指标的综合分析表明,中龄期是平茬利用的最佳时期。

关键词: 柠条林, 时空变异, 方差分析, Logistic模型, 多元回归

Abstract: The spatial-temporal variations of Caragana korshinskii vegetation growth were investigated based on the 23 a monitoring data on fixing plots of Caragana korshinskii plantations on terrace and non-terrace barren land in Guyuan, Ningxia Hui Atonomous Region. The investigation was carried out in different slope positions and with different ages of the plantations, including young-age period (1-7 a), middle-age period (8-15 a) and old-age period (16-23 a). The results showed: The plant height of C. korshinskii was affected by the slope position and the soil preparation methods. The change tendencies of average heights showed that lower slope>middle slope>upper slope in juvenile period, and upper slope>middle slope>lower slope in middle period. Compared with the non-terrace barren land, the plant height of leveled terrace were improved by 23.48%~45.33% in both young-age period and middle-age period, while there were no significant differences in the heights in the old-age period. With the slope position increased, the individual branches number, ground diameter and biomass decreased. Compared with the non-terrace barren land, the branches number, ground diameter, aboveground biomass and underground biomass of level terrace were improved by 26.79%-78.82%, 37.50%-50.00%, 3.50%-91.97%, and 19.59%-50.17%, respectively. The growth of C. korshinskii fit the logistic curve model. It is concluded that the best time for utilizing C. korshinskii is the middle period according to the obtained results.

Key words: Caragana korshinskii vegetation, spatial-temporal variations, analysis of variance, Logistic model, multiple linear regressions

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