我场建立油松种子园是从1975年开始的,到1977年底,共进行油松嫁接5次,其中3次较为成功(2次夏接,一次春接)成活率均达到90%左右。以后又进行了不同时间,不同砧木,不同接穗处理以及不同气候条件等嫁接对比试验。1976年春季,我们用9年生油松做砧木,高接樟子松(改建种子林)的试验,面积100亩,接穗3,000条,首次嫁接成活率达到了91.5%。1977年春季,在苗圃用2年生苗木做砧木,嫁接油松优树苗5,971株。夏季又接632株,成活率均达到90%左 The field of pine seed orchard was established in 1975. By the end of 1977, a total of 5 times of Chinese cedar had been grafted. Three of the successes (twice in summer and one in spring) reached 90%. Later conducted a different time, different rootstocks, scion and different climatic conditions such as grafting contrast test. In the spring of 1976, we used 9-year-old Pinus tabulaeformis as rootstocks and high-yielding Pinus sylvestris var. Mongolica (rebuilt seed forest) with an area of ​​100 mu and 3,000 scion trees. The first grafting survival rate reached 91.5%. In spring 1977, 5,971 trees of Pinus tabulaeformis seedlings were grafted with 2-year-old seedlings as nursery stock in the nursery. 632 plants are connected in summer, with survival rates of 90%