两类柑桔杂种砧木对脐橙(Citrus sinensis Osbeck)幼树生长和叶片糖营养含量年变化的影响

Effects of Two Kinds of Rootstocks on the Growth of Navel Orange (Citrus sinensis Osbeck)Young Tree and the Annual Changes in the Contents of Carbohydrates in Leaves

以体细胞杂种红桔+枳和红桔+粗柠檬、有性杂种Troyer枳橙和Swingle枳柚作砧木的耐湿脐橙(CitrussinensisOsbeck)2年生嫁接苗为试材,通过盆栽试验研究了砧木对苗木生长和叶片糖营养含量年变化动态的影响。结果表明:红桔+枳的生长势和花量明显地强于和大于其它砧木,红桔+粗柠檬的生长和花量表现介于2种有性杂种之间。叶绿素a/b和类胡萝卜素含量在不同砧木间无显著差异,而不同砧木显著或极显著地影响叶绿素含量各指标。砧木影响叶片可溶性糖和淀粉含量年变化动态的基本特征。在休眠期,红桔+枳的可溶性糖和淀粉含量都高于2种有性杂种砧木,而红桔+粗柠檬则反之;在生长期,红桔+粗柠檬的可溶性糖和淀粉含量表现出高于有性杂种砧木的趋势,而红桔+枳则介于2种有性杂种砧木之间。同时还重点讨论了2种体细胞杂种砧木的利用价值。

It was conducted with 'Nice' navel orange (Citrus sinensis Osbeck) two-year-old young tree whose rootstocks were Red tangerine +Trifoliate and Red tangerine +Rough lemon somatic hybrid, Troyer Citrange and Swingle Citrumelo sexual hybrid. Study on the effects of rootstocks on the growth and the annual changes in the contents of carbohydrates in leaves through potted experiment. The results are the following. Red tangerine + Trifoliate grew more vigorously than the other three. The number of blossoms of Red tangerine +Trifoliate was larger than the other three too. Difference in chlorophyll a/b and carotenoid content showed insignificance among all rootstocks. Different rootstocks remarkably influenced all contents of chlorophyll. Rootstocks obviously influenced the tendencies of the annual changes in the contents of the soluble sugar and the starch in leaves. During the dormant period, Red tangerine+ Trifoliate had higher content of the soluble sugar and the starch in leaves, and Red tangerine+ Rough lemon was to the contrary. During the growing period, Red tangerine+ Rough lemon had the lowest contents of the soluble sugar and the starch in leaves, and Red tangerine+ Trifoliate was between 2 sexual hybrids. The utilizations potential of these two somatic hybrids were discussed intensively.