摘要
在篱式果园中,行向对光照条件的影响是一重要问题。该文利用天文三角公式计算太阳在不同纬度地区某日各时刻的位置,同时计算树体的影长并确定影长系数,绘出太阳方位角A与影长系数ctgα的关系图。再根据设计的五种行向,取三行树篱在A^ctgα关系图中求得不同纬度、不同行向、树冠两个面的冠底部与冠中部受光时数,以确定果园在不同纬度地区的最佳行向。
The orientation of row and condition of illumination is very important in the hedgerow orchard. And me solar location is calculated by astronomical triangle formula at all times of certain day in different latitude area. At the same time, the coefficient of shadow length of the tree body is calculated and the relation diagram between a sun azimuth angle A and the ctgct of coefficient of the shadow length is drawn. According to designing five kinds of rows, and the time of illumination in tree crown bottom and central part on two faces of different latitude area is gotten from the A - ctgct diagram of three rows of hedges to determine the best orientation of row at different latitude area in the hedgerow orchard.
出处
《山东农业大学学报（自然科学版）》
CSCD
北大核心
2008年第3期393-398,共6页
Journal of Shandong Agricultural University：Natural Science Edition
关键词
果树
篱式果园
行向受光
Fruit tree
hedgerow orchard
illumination of orientation of row
作者简介
刘永朝（1957-），男，副教授，主要从事农业工程方面教学与研究。
