北京杨年轮宽度与气候因子相关性初探  

PRELIMINARY STUDY ON THE CORRELATION OF ANNUAL GROWTH RING WIDTH OF BEIJING POPLAR CLIMATIC FACTORS

作　　者：余清珠[1] 张永宏[1] 

机构地区：[1]西北林学院水保系

出　　处：《陕西林业科技》1996年第3期23-26,共4页Shaanxi Forest Science and Technology

摘　　要：以渭北黄土残源区塬面北京杨护路林为对象，进行胸高年轮宽度与气候因子相关性分析，结果表明：降雨量与年轮宽度呈正相关，与日照时数、相对湿度、地温、≥１０℃积温呈负相关；相关顺序为：年降雨量＞日照时数＞相对湿度＞地温＞≥１０℃积温＞风速。建立的多元回归方程，经可靠性检验，复相关系数为０．８８３９３，方程可靠。通过年轮宽度预报，２５个样本中，正差１３个，负差１２个，最大误差为－０．２８２８３，方程实用性强。According to correlation analysis, the annual growth ring width at 1. 3m high of Beijing poplar is interrelated positivelly with precipitation, but is interrelated negativelly with sunshine time, relative moisture, ground temperature, ≥10℃ accumulated temperature and wind velocity. The order of the correlation is: precipitation > sunshine time > relative moisture > groud temperature >≥10℃ accumulated temperature >wind velocity. A multi varible regress ation is propaned in this paper and the confidence test show that this equation is reliable (R=0. 8839). The results of annual growth ring width being predicted according to climatic factors show that there are 13 and 12 samples that have positive and negative error seperately (total samples 25) and the maxium error is 0. 282 8mm. Its show that the equation is useful.

关 键 词：黄土高原 北京杨 年轮宽度 相关性 气候因子 

分 类 号：S792.11[农业科学—林木遗传育种]