礦物養份及光合作用生成物之輸運與柑桔穗砧組合關係之研究（二）椪柑與柳橙

Transport Effect of Some Mineral Nutrients and Photosynthates with Reference to Stock-scion Relationship in Citrus (Ⅰ) Citrus poonensis Hort. Ex Tan. and Citrus sinensis L. (Osbeck)

柑桔營養狀況，極受所接合根砧之影響。本文合係繼同一題目下，以椪柑與柳橙為試材，研究此二種柑桔接合於酸桔，廣東檸檬及枳殼等根砧，對、磷、硫、鈣及銣等礦物養份之上運狀況，以及光合作用生成物之下運狀況之影響。所得結果顯示，與枳殼砧組合之此二種柑桔，對所施礦物養份之上運效應，較諸接合於酸桔或廣東檸檬根砧者均呈顯著差異；但光合作用生成物之下運，各不同穗砧組合間之差異不顯著。本文對不同根砧組合影響礦物養份或光合作用生成物之上，下輸運狀況會加討論。本試驗以放射追蹤方法達成。

The nutritional status of citrus is deeply influenced by its rootstock. This experiment is a consecutive study under the same title. Citrus poonensis Hort. ex Tan. and Citrus sinensis L. (Osbeck) were respectively grafted on Citrus sunki, Citrus limonia and Poncirus trifoliata rootstocks to study the influence of upward translocation of some mineral nutrients including phosphorus, sulfur, calcium and rubidium on the one hand and the downward translocation of photoslocation on the other. The results revealed that the upward translocation of various mineral nutrients in the combination of Poncirus trifoliata with either Citrus poonensis or Citrus sinensis were significantly different in comparison with Citrus sunki and Citrus limonia rootstocks. While the downward translocation of photosynthates in various stock-scion combinations was not significantly different, The influences on upward or downward movement in different stock-scion combinations were discussed in this report. This experiment was achieved by radiotracer method.