两种砧木对砂糖橘磷素累积消耗量的影响

采用以酸橘、枳为砧木的成年砂糖橘树作为供试材料,通过对各器官各部位磷素营养水平的分析,研究磷素累积消耗的特点与规律。结果表明：1、砂糖橘不同器官的磷素累积消耗量存在差异,以枝条的累积消耗量最大;除枝条外,不同砧木砂糖橘的相同器官中磷素累积消耗量差异不显著。2、两种砧木砂糖橘地上部的磷素累积消耗量均显著地高于地下部。3、砂糖橘地上部和地下部各器官不同部位的磷素累积消耗量存在一定差异,但不同砧木对地上部和地下部器官各部位的磷素累积消耗量影响不大。4、砂糖橘各级侧枝木质部与韧皮部的磷素累积消耗量存在一定差异,不同砧木砂糖橘之间也不相同。

Effect of Rootstock on Phosphorous Accumulating Consumption in the Tree Body of Shatang Mandarin (Citrus. reticulate)

The experiment was conducted in order to analyze and investigate P accumulating consumption characteristic of various parts in Shatang mandarin trees on sudacih and trifoliate（Poncirus trifoliate） rootstocks.The results were as follows：（1） P accumulating consumption of Shatang mandarin trees was quite different for different organs,and stem P accumulating consumption was biggest.Except stem,P accumulating consumptions in other organs were similar in the tree body of two rootstocks.（2） P accumulating consumption of Shatang mandarin trees between above-ground part and below-ground part was considerably different,and the former had a significantly higher P accumulating consumption in comparison with the latter.（3） P accumulating consumption of Shatang mandarin trees for various organs presented certain differentiation,but rootstock had little effect on it.（4） P accumulating consumption of Shatang mandarin trees in xylem and phloem was not all the same.In addition,different rootstock exhibited different traits.