学术
摘 要:
在洛川县苹果园选择不同修剪强度（轻度修剪、中度修剪和重度修剪）、不同树龄（5a、11a和16a）和不同树形（开心形、纺锤形和疏散分层形）的苹果树作为研究对象，用Hemi-View植物冠层半球影像系统测定了其冠层特性，分析了不同修剪强度、不同树龄和不同树形的苹果树冠层特性及其与光照的关系。结果表明：重度修剪能较大程度地提高树体透光性。随着树龄的增加，叶面积指数呈增加趋势，有利于截获辐射能，但在同时又降低了透光性。开心形树形较其它两种树形能增加透光性，提高光能利用率。[著者文摘]
文章出处:
《干旱地区农业研究》-2007年25卷5期 -75-79页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-7601（2007）05-0075-05
Canopy characteristics of Fuji apple trees in Luochuan County
HAO Yu-mei, LI Kai-rong （ College of Resources and Environment, Northwest A ＆ F University, Yangling, Shaanxi 712100, China ）
Abstract:
The apple trees of different pruning intensity（mild degree, moderate degree and heavy degree） and different tree age （5 years old, 11 years old and 16 years old） and the different shape of tree canopy（open center shape, spindle shape and disperse lamination shape） were selected to study in apple orchard in the Luochuan County, Shaanxi Province. The canopy characteristics and the relative light radiation were studied by the plant canopy hemispherical photographs system. The results showed that, the heavy degree tree effectively increased the light penetration. Along with the tree age increasing, the LAI increased, and it was advantageous in the interception radiation energy, hut the light- admitting quality reduced simultaneously. Compared with other kinds of shapes of trees, the open center shape trees were more able to increase the light - admitting quality, and raised the light use efficiency.[著者文摘]
Key words:
apple tree; canopy characteristics; pruning degree; the age of tree; the shape of tree
基金资助:
国家科技攻关项目（2001BAS08820）;中国科学院知识创新工程项目（KZCX1-06-02-03）
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