主枝数量对开心形梨树叶幕PPFD的影响  

Effect of Main Branch Number on PPFD Distribution of the Crown of Open Center System Pear Tree

作　　者：蔚露[1] 牛自勉[1] 谢鹏[1] 王建新[2] 

机构地区：[1]山西省农业科学院现代农业研究中心,山西太原030031 [2]运城市果业发展中心,山西运城044002

出　　处：《山西农业科学》2017年第2期187-190,共4页Journal of Shanxi Agricultural Sciences

基　　金：国家科技支撑计划项目(2014BA D 16B00);山西省现代农业产业技术体系建设项目(2016-04);山西省农业科学院科技自主创新能力提升工程项目(2015ZZCX-27)

摘　　要：以19年生梨树高光效开心树形的高接树为试材,研究不同主枝数量对树冠叶幕光照分布的影响,分析不同方位叶幕中PPFD空间变化及日变化规律。结果表明,在树冠水平叶幕中,随着主枝数量的减少叶幕PPFD强度增加,其中,四主枝处理的全树平均PPFD强度最高,为74.25%;八主枝处理平均PPFD强度最低,为64.73%。在树冠垂直叶幕中,上层叶幕各处理间PPFD无明显差异;中层叶幕各处理间差异明显,四主枝处理达到76.25%,其他处理介于60.96%~65.21%;下层叶幕的变化趋势与中层相似。在一天内不同时间阶段,叶幕PPFD平均强度与主枝数量有关,其中,四主枝处理平均强度最高,测定平均值高于其他处理树,全树叶幕PPFD强度随着主枝数量的增加呈降低趋势。Effect of different main branch numbers to light distribution of tree canopy were studied at 19-year top worked pear trees of high light efficiency and open center systern and the spatial variation and diurnal variation of PPFD in different orientation of the leaves were analyzed.The results showed that with the decrease of main branch numbers,PPFD intensity of canopy increased in the horizontal tree canopy.Among them,the whole tree of four main branch treatment had the highest average PPFD intensity of 74.25%,while the eight main branch had the lowest of 64.73%.In the vertical tree canopy,there was not significant difference of PPFD between different treatments in upper canopy,there was significant difference between every treatments in middle canopy,four main branch treatment reached 76.25%,and the other treatments ranged from 60.96%to 65.21%,the variation trend of lower canopy was similar to the middle.At different times of the day,the average canopy PPFD intensity was related to the main branch numbers.Among them,average intensity of four main branch treatment was the highest,tested average value of which was higher than the other treatment tree,and with the increase of main branch numbers,PPFD intensity of the whole tree canopy decreased.

关 键 词：梨树 主枝数量 开心树形 PPFD 

分 类 号：S661.2[农业科学—果树学]