苹果矮化砧木新品种‘冀砧2号’

苹果矮化砧木新品种‘冀砧2号’由‘SH40’实生后代中选出，嫁接亲和性好。红富士系苹果品种‘天红2号’嫁接到‘冀砧2号’中间砧上，定植翌年始花，3年生开花结果株率达90%，4年生树产量可达15 000 kg ? hm-2，成龄树株高是SH40的85%左右，枝展是SH40的75% ~ 85%，中短枝占总枝量的75%以上，产量可保持在45 000 ~ 52 500 kg ? hm-2，果实整齐度好，平均单果质量256.0 g，硬度8.7 kg ? cm-2，可溶性固形物含量14.5% ~ 16.5%，着色90%以上。适宜在河北省中南部或气候类似的区域应用。

A New Apple Dwarfing Rootstock Cultivar‘Jizhen 2’

‘Jizhen 2’is a new apple dwarfing rootstock cultivar selected from the seedling progenies of‘SH40’. It had a good grafting affinity. Grafted on‘Jizhen 2’as inter-rootstock，the Fuji tree will start flowering in the next year. The flowering and fruiting rate of the 3-year-old tree can reach 90%. The average yield of the 4-year-old tree can reach 15 000 kg ? hm-2. The height of the adult tree is about 85% of the SH40，the branching is 75%–85% of the SH40，and the middle and short branches account for more than 75% of the total branches. The yield can be maintained at 45 000–52 500 kg ? hm-2 in high yield year. The average fruit weight of the Fuji is 256.0 g. The hardness of the Fuji fruit is 8.7 kg ? cm-2. The soluble solids content is 14.5%–16.5%.‘Jizhen 2’is suitable for application in the south-central part of Hebei Province or in similar climate areas.