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A STUDY ON CHANGE LAWS OF VEGETATIVE ELEMENTS OF NEEDLE-LEAVES OF MOTHER TREE IN CHINESE-FIR SEED ORCHARD

Long Guangsheng Xu Gangbiao Li Maiqiu Zuo Haisong Liao Zaijun( Central-South Forestry College,Zhuzhou 412006)( Hunan Silviculture Bureau,Changsha 410007)( Dongan Seed Orchard,Dongan 415600)  
This paper studies the change laws of the needle-leaves of the mother tree in Chinese-fir seed orchard of the clone from Dongan county of Hunan province. It determines the collective date of the sample to use the vegetative analysis. It discusses the relationships between the strabile output and the content of N.P and K. It provides the critical values and optimum ranges of the contents of the vegetative elements.
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