Yuan Ying,Hui Yangyu,Wu Yonglin,et al.Study of Influence Factors of locust Growing in the Loess Hilly Region[J].Research of Soil and Water Conservation,1996,3(03):146-154.
黄土丘陵区刺槐生长的影响因子研究
- Title:
- Study of Influence Factors of locust Growing in the Loess Hilly Region
- Keywords:
- loess hilly; locust; effective factor
- 摘要:
- 通过5年的试验样地定点观测及野外大面积调查,收集了不同条件下的刺槐生长量数据320多组,利用方差方析定性得出了显着影响黄土丘陵区刺槐胸径生长的因子有年降雨量林龄、地面坡度、林分密度及地形部位.利用回归分析定量得出了这5个因子对刺槐胸径生长影响的关系模型.影响最显着的因子是年降雨量,其它依次为林龄、坡度、林分密度、地形部位.
- Abstract:
- Based on the spot measurement and field investigation for five years,according to more than 320 groups data of locust growth rate under different conditions.The variance analysis show that the main effective factors are annual rainfall,crop age,gradient,density of crop and topographic conditions which effects on the locusts normal diameter growth in loess hilly area.Furthermore,using the regression analysis,a relative model about this five factors is obtained as above,from which we can conclude that the most effective factor is annual rainfall,otherwise the croage,gradient,density of drop and topographic conditions in turn.
参考文献/References:
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[2] 北京林学院.数理统计.北京:中国林业出版社,1984
[3] 王正秋.刺槐林的间伐与皆伐更新技术.陕西水土保持,1988,(5):7-9
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备注/Memo
收稿日期:1995-9-10。