不同砧木对脐橙幼树生长和叶片养分含量变化的影响

Effects of two kinds of rootstock on growth and change of nutrient contents in leaf of young tree of navel orange

以体细胞杂种红桔+枳和红桔+粗柠檬、有性杂种Troyer枳橙和Sweingel枳柚作砧木的脐橙2年生嫁接苗为试材,利用盆栽试验研究了不同砧木对苗木生长和叶片养分含量年动态变化的影响。结果表明,红桔+枳的生长势和花量明显地优于其它砧木,红桔+粗柠檬的生长和花量介于2种有性杂种之间;砧木基本上不影响叶片N、P、K、Mg和Mn含量年变化,但明显影响叶片Ca、Fe和Zn含量的年变化;在同一个生长期,不同砧木对叶片养分含量有明显的影响。此外本文还讨论了体细胞杂种砧木的利用价值。

Pot experiment was conducted to study the effect of four rootstocks [red tangerine+trifoliate (Citrus reticuiata Blanco+Poncirus trifoliata (L)Raf] and red tangerine + rough lemon(C.reticuiata Blanco+C. jambhiri Lush)somatic hybrids, troyer citrange [C. sinensis Osbeck×P. trifoliate(L) Raf] and swingle citrumelo ([C. grandis Osbeck×) P. trifoliata (L)Raf sexual hybrids] on growth and annual change of nutrients in leaf of two years old navel orange (Citrus sinensis Osbeck). The results showed that the rootstock of red tangerine + trifoliate was significantly superior to other rootstocks on growth and flowering amounts of navel orange, and the effect of red tangerine + rough lemon was in the middle between two sexual hybrids. Rootstocks did not influence the annual changes of N, P, K, Mg and Mn contents in leaf, but affected on Ca, Fe and Zn contents, and the effect of different rootstocks on nutrient contents in leaf was significant, at the same growing period. In this paper, the potential of two somatic hybrids were also discussed.