黑龙江农业科学Issue(9)：86-91,6.DOI:10.11942/j.issn1002-2767.2016.09.0086
银杏树落叶的相关因素分析
Related Factors Analysis on Ginkgo Biloba Leaves
摘要
Abstract
Ginkgo Biloba is one of the most common street afforestation tree species in Chengdu city ,its leaf se‐nescence and fall off have some effect on the urban landscape ,the environment and the transportation .In order to find out the deciduous rule of the Ginkgo Biloba in Chengdu ,the influence factors of the fallen leaves to make full use of the Ginkgo Biloba ,some rich resources of Ginkgo Biloba in Sichuan university were used to explore whether soil pH and soil surface temperature have some effect on the Ginkgo Biloba leaves ,and to find out the deciduous rule of the Ginkgo Biloba by analyzing the RGB value of the Ginkgo Biloba leaves from the different parts .The results showed that the decline of Ginkgo Biloba leaf fall off ,the soil pH and soil temperature had obvious relevance .Under the soil pH 5 .8~6 .3 ,the content of chlorophyll in Ginkgo Biloba leaves was gradu‐ally falling ,with the increasing of soil pH in the range ,while the defoliation rate was gradually increased .Un‐der the pH 5 .8~6 .1 ,its growth rate was faster than the pH6 .1~6 .3 .Under the soil surface temperature 17 . 0~20 .5 ℃ ,defoliation rate of Ginkgo Biloba was gradually growing with the increasing of soil temperature .At the same time ,through the RGB value of Ginkgo Biloba leaves of image analysis in different regions ,plant leaf chlorophyll gradually degraded in the process of aging and fall off ,leaves turned yellow gradually .And the leaves of Ginkgo Biloba in lower part fall off faster than other parts .The fallen leaves which were from differ‐ent parts of the tree affected by soil temperature and soil pH were different .In general ,the defoliation rate of the tree in the middle and lower increased with the increasing of soil temperature and soil pH ,but the defolia‐tion rate in the upper had no significant correlation between the soil surface temperature and soil pH .The re‐search results could be used for city Ginkgo Biloba green area ,especially the main series of Ginkgo Biloba leaves time adjustment ,optimization of urban greening and landscape effect of ginkgo .It could reduce the impacts on the traffic and improve the comprehensive benefit of city Ginkgo Biloba plant .关键词
银杏落叶/p H/温度/RGB值Key words
Ginkgo Biloba leaves/pH/temperature/RGB分类
农业科技引用本文复制引用
余凯文,德佳硕,龚婧窈,姚娟,邓东周,庄文化..银杏树落叶的相关因素分析[J].黑龙江农业科学,2016,(9):86-91,6.基金项目
北川羌族自治县汶川地震灾后大熊猫等保护及栖息地回复重建试验研究资助项目（51209153）；四川大学大学生创新训练计划校级重点资助项目 （）
