朋娜脐橙果实年增长与叶片氮磷钾含量的相关性研究

STUDY ON CORRELATION BETWEEN BANAUGA NAVAL ORANGE FRUIT GROWTH AND NPK CONTENTS OF LEAF

对朋娜脐橙果实的纵、横径进行了田间测定，对春梢叶片氮磷钾含量进行了分析。其结果为：果实纵、横径净生长量在年变化过程中出现３次生长高峰，纵径比横径早１０ｄ。营养春梢叶片氮磷钾含量在４～５月较低，磷钾６月中旬达最高水平，氮含量８月中旬达最高水平，氮磷钾在７～１０月含量相对稳定。果实纵、横径生长量与叶中氮含量呈极显著正相关，与钾含量呈显著正相关，与磷含量呈正相关，但不显著。即果实大小受叶片中氮钾的影响较大。

Field determination on the vertical length and the horizontal length of Banauga navel orange,leaf analysis on NPK content of Spring shoot were conducted The results were as follow There were 3 growth peaks in the net increment of fruit vertical length and horizontal length within a year, the growth peak of the vertical length was 10 day earlier than that of the horizontal length NPK content of Spring shoot was low from April to May, PK content get up to the highest level in the middle of June, N content get up to the highest level in the middle of August, NPK content was relatively stable from July to Qctober The growth of the vertical and horizontal length of the fruit showed positive correlation most significantly with N content of the leaf, and significant positive correlation with K content, and correlation with P content That means the fruit growth was influenced more by NK content of leaf, but only a little by P content