不同矮化中间砧对黄金梨树体生长的影响及嫁接亲和性相关性分析

为探索不同梨矮化中间砧对树体生长发育的影响,本试验以杜梨为基砧,嫁接23种不同中间砧与黄金梨砧穗组合为试材,于第4个生长季调查了嫁接口周长、中间砧周长、接穗新梢长度、新梢叶片数、以及叶片卷曲度等指标,统计分析结果显示：BA29、OHF97、K6矮化中间砧对黄金梨的致矮效果最好;中间砧嫁接亲和性与砧木周长、枝梢及叶片生长存在一定的相关性,相关性顺序依次为基砧周长>新梢节间长度>上接口周长与接穗周长的比值（D/E）>下接口周长与中间砧周长比值（B/C）>新梢叶片卷曲度>新梢长度,在亲和性早期鉴定中可用新梢叶片卷曲度来判断亲和力的大小,以上接口与接穗周长的比值（D/E）来表示亲和力更准确。

Effects of different dwarfing interstocks on Whangkumbae pear growth and correlation analysis of graft-compatibility

Abstract: In order to explore the effects of dwarfing interstock on pear tree growth, the 23 different interstocks, each of which was combined between Pyrus betulaefolia （as the base stock） and Whangkumbae pear (as the scion), were used as test material. After four years of growth, the indexes of graft union circumference, interstock circumference, length of scion shoot, number of shoot leaves and leaf curl were investigated. Statistical analysis results showed that: BA29, OHF97 and K6 dwarfing interstocks had the best dwarfing effect on Whangkumbae pear. There was a certain correlation between interstock graft-compatibility and rootstock circumference, branch and leaf growth, and the correlation order for the base stock circumference > shoot internode length > ratio of upper graft union circumference to scion circumference (D/E) > ratio of lower graft union circumference to interstock circumference (B/C) > shoot leaf curls > shoots length. The leaf curl was thought to be useful for the early screening of the graft-compatibility, and the ratio of upper graft union circumference to scion circumference (D/E) was more accurate to indicate graft-compatibility.