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为使高寒地区尽快实现梨树栽培现代化,提高经济效益,我们针对当地条件,采用适应性强、来源广的乔砧,进行了矮化密植早期丰产试验。试验从1978年春开始,选用自己培育的白杜梨为砧木的健壮一年生苗
In order to modernize the cultivation of pear trees in alpine regions and increase economic benefits as soon as possible, we conducted an early high yield experiment of dwarfing and close planting using the adaptable and widely-sourced Qiao an for the local conditions. Test from the spring of 1978, the selection of their own cultivation of white Du pear rootstock of robust annual seedlings