林业科学2013，Vol.49Issue(1)：14-20,7.DOI:10.11707/j.1001-7488.20130103
黄土高原柠条锦鸡儿灌木林生长的时空变异特征
Spatial-Temporal Variability of Caragana korshinskii Vegetation Growth in the Loess Plateau
摘要
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.关键词
柠条林/时空变异/方差分析/Logistic模型/多元回归Key words
Caragana korshinskii vegetation/ spatial-temporal variations/ analysis of variance/ Logistic model/ multiple linear regressions分类
农业科技引用本文复制引用
程杰,王吉斌,程积民,罗宗宽..黄土高原柠条锦鸡儿灌木林生长的时空变异特征[J].林业科学,2013,49(1):14-20,7.基金项目
国家林业局林业公益性行业科研专项(200904056) （200904056）
全国沙化典型地区定位监测项目 （）
国家自然科学基金项目(41230852). （41230852）
