薄壳山核桃砧木不同处理对嫁接苗生长的影响

Trial of Carya illinoensis rind grafting in the field with different rootstock treatment

对薄壳山核桃进行大田本砧嫁接试验研究,结果表明,对砧木进行断根处理,控制伤流是提高薄壳山核桃嫁接成活率的关键因素,采用挖骨皮接,容器苗断根并短截处理嫁接保存率达74.2%,3-0苗断根移栽并短截处理嫁接保存率72.5%。砧木的断根程度对嫁接苗当年生长量影响差异显著,顺序依次为移植苗铲根>断根容器苗>断根移栽苗,2-1移植苗铲根并短截处理的嫁接苗生长量平均达到77.34 cm。砧木粗度对嫁接苗当年生长量也有较大影响,砧木地径40-50 mm嫁接苗当年生长量最大为34.09 cm。

Rind grafting trial was carried out on Carya illinoensis using seedling as rootstock in the field. The results showed that the grafted seedling survival was highest( 74. 2%) under the rootstock treatment of root cut and cut-back to biennial container seedlings. And the grafted seedling survival was 72. 5% under the rootstock treatment of root cut and cut-back to the 3-0 transplanted seedlings. There occurred a significant effect on current increment of grafted seedlings among different root cut manner,with average current increment followed as the 2- 1 transplanted seedlings with part of roots cut( 77. 34cm),the biennial container seedlings with root cut,the transplanted perennial seedlings with root cut as rootstock. Thickness of rootstock had a great effect on current increment of grafted seedlings,with the highest value of 34. 09 cm under the rootstock thickness ranged 40-50 mm. So root cut to rootstocks and controlling bleeding could improve the grafting survival rate of Carya illinoensis.