河南省信阳市园林植物多样性及其应用

在大量实地调查及文献查阅的基础上，对河南省信阳市园林植物多样性特点进行了分析研究。结果表明：（1）信阳市园林植物种类丰富，共有98科251属545种，其中裸子植物7科18属54种，被子植物91科233属491种。在被子植物中，双子叶植物83科209属446种，单子叶植物8科24属45种。按生活型分类，木本植物451种，草本植物94种。（2）信阳市园林植物类型主要属于温带成分，亚热带分布类型也有一定数量，有明显的过渡性特征。这与其自然地理位置处在北亚热带向暖温过渡地区相一致。（3）在信阳市园林植物种中，自然区系种类仅占约1/4，非自然区系成分占绝对优势。 应考虑栽培驯化当地自然区系种类，以丰富园林景观和增强园林植物的适应性。同时加大藤本和草本植物所占的比例，均衡种植不同的生活型，以形成丰富多样的园林景观。

Study on the Diversity and Application of Landscape Plants in Xinyang City

Based on the anterior plentiful investigation and literatures,the geographical compositions and the characteristics of the landscape plants in Xinyang city were studied.The results were as following：（1） the landscape plants were abundant in Xinyang city.In this region there were 545 species,251 genera and 98 families in landscape plants,which include 54 species,18 genera and 7 families in gymnosperm and 491 species,233 genera and 91 families in angiosperm.There were 446 species,209 genera and 83 families in dicotyledon and 45 species,24 genera and 8 families in monocotyledon among the angiosperm.（2） The most of the landscape plants belonged to temperate zone types and some belonged to subtropical zone types.The characteristic had a clear transitional.This was consistent with natural geographic location at the north sub-tropical to warm temperate zones of transition.（3） The types of natural flora was only about 1/4,the non-natural floristic composition had an advantage in the landscape plants in Xinyang.We should consider the cultivation of domesticated species to the local natural flora in order to rich landscape and enhance the adaptability of landscape plants.At the same time we should increase the proportion of vines and herbaceous plants in order to form rich and varied landscape.