The Application Status And Regional Analysis Of Apple Dwarf Rootstock In Shaanxi

Dwarf cultivation is the direction of apple cultivation in China.The studying of dwarf rootstock suitable in shaanxi, selecting well division index, is of great significance to apple dwarf rootstock application.Based on the meteorological data(from 1985 to 2014)of representative 58 counties(districts) in Shaanxi province, the statistics of each period average temperature, extreme temperature, precipitation, evaporation capacity, etc were studied, the dwarf cultivition is appraised by scoring different index assignment. According,the inspected results conform to expert evaluation and research and raise the application area of apple dwarf proposal in shaanxi(draft), The main results obtained as following:1. The index of apple dwarf rootstocks zoning in ShaanxiTemperature indicators: mean annual temperatures、≥10℃accumulated temperature、≥10℃days、January average temperature、January the max. DIF、January the lowest soil temperature、January the average surface temperature、extreme maximum temperature、extreme minimum temperature;Moisture indicators: annual precipitation、April precipitation、May precipitation 、 June precipitation 、 annuual difference between precipitation and evaporation、April difference between precipitation and evaporation.2. The cultivation area of Shaanxi apple dwarf suitabilityOptimal quality region(≥80): Yijun, Yintai, Baoji, Longxian, Fengxian, Qianyang,Qishan, Fengxiang, Meixian, Binxian, Changwu, Chunhua, Wugong, Yangling, Xingping,Yongshou, Huaxian;Suitable region(79.5~70):Huanglong, Huangling, Luochuan, Ganquan, Baota, Ansai,Yichuan, Fuxian, Yaozhou, Fufeng, Qianxian, Xunyi, Liquan, Sanyuan, Jingyang, Qindu,Hancheng, Fuping, Dengcheng, Baishui, Linwei, Huayin, Gaoling, Lintong;Sub-suitable region(69.5 ~ 60):Wubu, Qingjian, Zichang, Wuqi, Zhidan, Yanchuan,Dali, Pucheng, Heyang;Unsuitable region(<60):Suide, Zizhou, Jiaxian, Jingbian, Mizhi, Hengshan,Dingbian,Taibai.