杉木种子园球果产量预测方法的研究

Abstract

Abstract:

An investigation at Youxi and Yangkou seed orchard of Chinese fir from 1991 to 1994 has been made to study two cone crop prediction methods counting number of visible cones in crown from an observation point and counting number of cones in certain informative section of crown. Prediction models were developed for each method. The results verified at different seed orchards showed that the models could be used precisely and easily.

Key words: Chinese fir, Number of visible cones in crown, Number of cones in informative section, Prediction model, Cone prediction

Cite this article

Fangyuan Yu,Yousheng Chen,Shihai Xiao,Yuanhao Wang,Rongzhuo Yu. STUDY ON PREDICTION METHOD OF CONE CROP IN CHINESE FIR [CUNNINGHAMIA LANCEOLATA (LAMB.) HOOK] SEED ORCHARD[J]. Scientia Silvae Sinicae, 1997, 33(3): 225-233.

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Figures/Tables 8

Table 1

The relationship between number of vsible cones (x) counted from an observation point and its total number of cones (y) on a tree"

Table 1

Table 2

The relationship between number of visible female cones (x) counted from an observation point and its total number of cones (y) on a tree"

Table 2

Table 3

The relationship between number of visible cones (x) counted from an obsearvation point and its total number of cones (y) on a tree"

Table 3

Table 4

The relationship between number of cones in an informative section (x) and its total number of cones (y) on a tree."

Table 4

Table 5

The reliability of predictive models checked at different orchards"

Table 5

Fig.1

Sketch map of droping flowers and cones in Chinese fir"

Fig.1

Table 6

A comparison between number of visible female cones counted from an observation point and its total number of cones on a tree"

Table 6

Table 7

The number of sample trees needed for counting cones in visible crown when prediction precision is given"

Table 7

References 3

1	田淑静, 等. 油松种实产量预测方法的探讨. 林业科技通讯, 1989. (10): 20- 23.
2	陈幼生, 方升佐. 杉木种子园结实量近期预测方法的研究. 南京林业大学学报, 1990. 14 (3): 1- 6.
3	陈幼生, 喻方圆. 利用开花结实信息段预测中、幼龄杉木球果产量的研究. 林业科学, 1993. 29 (5): 443- 448.

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STUDY ON PREDICTION METHOD OF CONE CROP IN CHINESE FIR [CUNNINGHAMIA LANCEOLATA (LAMB.) HOOK] SEED ORCHARD

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