核桃砧木新品种‘中宁强’

A New Walnut Rootstock Cultivar 'Zhongningqiang'

核桃砧木新品种‘中宁强’是由美国引进的魁核桃(Juglans major)与河南省洛宁县核桃(Juglans regia L.)杂交选育而成。具有树干通直,根系发达,分枝力强,生长速度快,抗干旱,耐瘠薄,嫁接亲合力高等特点,年胸径生长量1.7 cm,为核桃的1.7倍。嫩枝扦插生根率85%,作砧木嫁接核桃品种的枝接成活率90%以上,芽接成活率95%,嫁接的核桃品种表现出生长势旺盛,坚果仁更加香甜。适宜在华北、西北、华东和西南核桃主产区应用。

‘Zhongningqiang'is a new walnut rootstock cultivar derived from‘Juglans major'× ‘Juglans regia L.'. It is a hybrid walnut cultivar with excellent characteristics,such as better stemstraightness,development of root system,higher divarication capability,fast-growing,drought resistance,leanness resistance and better graft compatibility. The diameter growing quantity is 1.7 cm every year,is 1.7 multiples of‘Juglans regia L.'. The rooting rate of green-wood cutting of‘Zhongningqiang'is 85%. Used‘Zhongningqiang'as the stock,used‘Juglans regia L.'varieties as grafting scion,the branch grafting survival rate of‘Zhongningqiang'is more than 90%,the bud grafting survival rate of‘Zhongningqiang'is up to 95%. And the walnut is growing luxuriantly,the kernel of the nut is good taste. It is suitable for the application in the main walnut production area such as North China,Northwest China,East China and Southwest China.