银杏叶量及负载量对枝、叶、种实养分影响的研究Ⅰ银杏枝、叶、种实中N、P、K含量变化及其相关分析

Study on Effect of Number of Leaves and Seeds Of Ginkgo biloba L on Nutrition of Shoots, Leaves and Seeds Ⅰ The changes of N,P,K in Shoots、Leaves、Seeds and correlation analyses

本文研究了不同叶量、负载量对银杏枝、叶、种实中Ｎ、Ｐ、Ｋ含量的影响。结果表明：１．叶量、负载量增大，６月份以前枝中Ｎ、Ｐ、Ｋ含量提高，而６月份以后，枝、叶中Ｋ含量仍随负载量增大而升高；２．叶中Ｎ、Ｐ、Ｋ含量三者间均有极显著正相关，短枝中仅Ｎ、Ｐ相关达显著水平，枝与叶、枝与种实中的Ｎ、Ｐ含量间分别有极显著正相关和较显著（α＝１０％）以上正相关。

Effects of number of leaves and seeds of Ginkgo on contents of N,P,K in shoots,leaves,seeds were studied in this paper. The results showed: (1)the more the number of leaves and seeds were,the higher N,P,K in the brachyplasts was before June,with increase of seeds number,and affter June the K content of the branches and leaves was also raising. (2)there was a very significant correlation between N and P,N and K,P and K in leaves,in short shoots,only the correlation between N and P shewed signigicant. the correlation of N between shoot and leaf or of P between shoot and seed was very signigicant or signigicant separately(α=10%).