核桃是一种很有价值的木本油料树,在我省已有悠久的栽培历史,但因长期以来实行实生繁殖,所以其后代分离明显、变异复杂、产量较低、结果较晚。各地生产实践证明,要使核桃提早结果、高产、稳产、优质,必须改变过去的实生繁殖为嫁接繁殖,走核桃嫁接化的道路。但是核桃含有较多的单宁,嫁接时遇空气易与铁反应,生成单宁酸铁,影响成活率的提高,因而嫁接技术难度较大,成活率较低。因此,核桃嫁接成为目前核桃生产上急待解决的一个问题。 Walnut is a valuable woody oilseed tree, which has a long history of cultivation in our province. However, because of the long-term practice of real-life reproduction, its offspring are obviously separated and their variation is complicated with low yield and the result is late. Practice has proved around the production, to make early results walnut, high yield, stable yield, high quality, must change the past, the actual reproduction for grafting, walking walnut grafting road. However, walnuts contain more tannin, when grafted easy to react with the case of iron, generate iron tannate, affecting the survival rate increased, so grafting more difficult, lower survival rate. Therefore, the grafting of walnut has become an urgent problem in walnut production.