现已获得16个苹果品种和6个梨品种的无病毒母本树。
Virus-free mother trees of16apple varieties and6pear varieties had been obtained in the study.
以开心形丰水梨幼树为试材，通过轻剪、重剪和不修剪处理对其树体生长指标、产量、根系分布度进行比较分析。
The young trees of open-center shaped Housui pear were used as the material to study the effect of different pruning rate(light, heavy and no) on the pear tree growth, fruiting and root growth.
为选出适合尖把王梨的矮化中间砧，以克服尖把王梨幼树结果晚、丰产晚的缺点，研究了不同矮化中间砧对尖把王梨幼树的产量和树势的影响。
The effect of different dwarfing inter stocks on yield and tree vigor of young Jianbawang pear trees was studied to overcome the disadvantage of late fruit-bearing and late maturity.
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