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以SDC系苹果砧木为试材,连续9年观察测定了在其上嫁接的红星树早花、早果、产量、果实品质、树体矮化性及抗逆性等生物学特性.结果表明:(1)SDC系砧木嫁接树比M9、M7嫁接树提早1—2年开花结果,幼树期花量密度大,5年生树总花序数及单位树干面积花序数明显高于M9和M7.(2)果皮色素花青苷含量、果肉可溶性固形物含量和总糖量均高于M9和M7,果实外观及内在品质优良.(3)幼树矮化性状明显,树高/冠幅比值小,树冠开张.(4)叶片蒸腾量小.脱落酸(ABA)含量高,单位叶面积失水量小,抗旱性强.(5)嫁接树越冬期枝条自由水含量高,抽条率明显低于M9,越冬能力强.并对SDC系砧木的优缺点进行了讨论.
Taking SDC apple rootstocks as test materials, the biological characteristics of early flowering, early fruit yield, fruit quality, tree dwarfness and stress resistance were observed and measured for 9 consecutive years.The results showed that: (1) The results showed that the grafted tree of SDC rootstock had flowering 1-2 years earlier than that of M9 and M7 grafted trees, and the flower density was higher at sapling stage than that of M9 and M7. (5) 2) The anthocyanin content of peel pigment, soluble solids content and total sugar content of pulp were higher than those of M9 and M7, and the appearance and intrinsic quality of the fruit were excellent. (3) The dwarf characteristics of saplings were obvious, the tree height / (4) Small amount of leaf transpiration, high content of abscisic acid (ABA), small amount of water loss per unit leaf area and strong drought resistance. (5) The free water content of grafted tree was higher than that of M9 , Strong ability of overwintering, and discussed the advantages and disadvantages of SDC rootstocks.