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林业科学 ›› 1996, Vol. 32 ›› Issue (6): 481-490.

• 论文及研究报告 •    下一篇

桉树营养状况与叶片营养诊断研究*

李淑仪,林书蓉,廖观荣,何小霞,黄中东   

  1. 广东省土壤研究所 广州 510650
  • 收稿日期:1995-02-27 出版日期:1996-11-25 发布日期:1996-11-25

THE NUTRITION STATUS AND FOLIAR NUTRITIONAL DIAGNOSIS OF EUCALYPTUS

Shuyi Li,Shurong Lin,Guanrong Liao,Xiaoxia He,Zhongdong Huang   

  1. Guangdong Institute of Soil Science Guangzhou 510650
  • Received:1995-02-27 Online:1996-11-25 Published:1996-11-25

摘要:

本文研究了雷林1号桉、尾叶桉和柠檬桉一年和三年生植株养分浓度及养分积累量;叶片营养诊断的采样时间、诊断方法,并用临界值法和系统综合诊断法(DRIS)诊断桉树施肥“中试”区的营养状况。结果表明:三种桉树的大量养分浓度均以叶最高,全株养分积累量在8月龄时以N、K最高, 36月龄时K、Ca较高;营养诊断的最佳采样时间,雷林1号桉和尾叶桉是8月龄,柠檬桉是20月龄;雷林1号桉N、P、K,尾叶桉N、P和柠檬桉P、K临界浓度(g·kg-1)分别为17.2、1.3、4.9、17.0、1.3和1.1、9.6;DRIS诊断参数为K/P、P/N和N/K。

关键词: 桉树, 营养状况, 施肥, 营养诊断, 临界值, DRIS

Abstract:

The concentration, absorption of nutrients in 8 months old and 36 months old E. Leizhow No. 1, E. urophylla and E. citriodora were studied. The sampling time of leaves for nutritional diagnosis and the methods of nutritional diagnosis were discussed. The nutrition status of Eucalyptus in medium-expand experiment plots of Eucalyptus fertilizing were diagnosed by using diagnosis of eritical concentration and diagnosis and recommendation of integrated system (DRIS).The results indicated that the value of macro-nutrients concentration in leaves was the highest for all three Eucalyptus, that the Eucalyptus would absorped more nitrogen and potassium at 8 months old and absorbed more potassium and calcium at 36 months old. It was showed that the optimal time of leaf sampling in nutribnt diagnosis was at 8 months old for E. leizhow No. 1 and E. urophylla at 20 months old for E. citriodora. The critical concertration (g·kg-1 of N, P and K for E. Leizhow No. 1 was 17.2, 1.3 and 4.9 respectively, and that of N, P for E. urophylla was 17.0 and 1.3, and P, K for E. citriodora was 1.1 and 9.6. The diagnosis parameters of DRIS should be K/P, P/N and N/K.

Key words: Eucalyptus, Nutrition status, Fertilization, Nutritional diagnosis, Critical concentration, DRIS