答山东读者唐吉甫北斗自花授粉座果率仅为3％,所以栽植时必须配植适宜的授粉树。据日本青森县苹果试验场研究,以千秋、世界一、金帅、印度、红月、夏绿、红金、东光等品种作北斗的授粉树时,座果率均在76％以上;以津轻、阳光、王林、嘎拉、元帅系、北幸、惠、国光、金星、祝光等品种作北斗的授粉树时,座呆率在51—75％之间。以上为良好的 A Shandong reader Tang Ji Fu Beidou self-pollinating fruit rate of only 3%, so planted with appropriate pollination trees. According to the research of apple test field in Aomori prefecture of Japan, when the pollination trees of Beidou were used as the varieties of Beidou in the ages of Aqiu, the world, Jinshuai, India, Hongyue, Xialan, Hongjin and Dongguang, the fruitsetting rates were above 76% Jin Qing, Sunshine, Wang Lin, Gala, Marshal Department, North Fortunately, Hui, Guoguang, Venus, Zhuang and other varieties for the Dipper’s pollination tree, the shelter rate between 51-75%. The above is good