Study on Growth and Yield Forecast Model for Eucalyptus Pulpwood Plantation

doi:10.13466/j.cnki.lyzygl.2017.01.007

Abstract

Abstract:

The eucalyptus pulpwood plantation of State-run Leizhou Forestry Bureau was taken as the research object and the eucalyptus pulpwood plantation growth and yield model was studied based on the data of 190 sample plots surveyed in January to February in 2015. SPSS 19.0 and ForStat 2.2 were used.Results show that density index model is SDI=1.7470N0 ^1.0951 $e - 3.7637 t 0.05 - 0.1742 L$ ,basal area growth model is G=16.7828L ^0.1529 (1- $e - 1.0125 × 10 - 8 SD I - 2.1970 t$ ) ^0.5554,volume model is M= $e 2.3641 + 0.0988 L - 3.0557 t - 1 G 0.9126$ .The research results can provide theoretical basis for forecast of growth and yield,determination of forest mature age and forest resources management for eucalyptus pulpwood plantation in State-run Leizhou Forestry Bureau.

Key words: Eucalyptus pulpwood, plantation, SDI, growth and yield forecast

CLC Number:

S757.2

LI Zongjun, MO yanqing, MO Xiaoyong, ZHAO Xueli, LIU Ping. Study on Growth and Yield Forecast Model for Eucalyptus Pulpwood Plantation[J]. FOREST RESOURCES WANAGEMENT, 2017, (1): 31-36.

Figures/Tables 5

Tab.1

Fig.1

Fig.2

Tab.2

Tab.3

References 7

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计算步骤	参数值		相关系数r
计算步骤	K	b	相关系数r
原始数据	5.0381	-0.2651	0.2672
第一次剔除	6.2967	-0.7935	0.6841
第二次剔除	7.5366	-1.3040	0.7621
第三次剔除	7.6693	-1.3282	0.8799

模型名称	相关系数r	预测精度P/%
林分密度指数模型	0.8812	96.64%
断面积模型	0.9429	97.94%
蓄积收获模型	0.9614	98.96%
收获预估模型	0.9620	97.25%

地位指数	年龄/a	初植密度 /(株/m³)	预估蓄积 /m³	实际蓄积 /m³
4.5	1	1967	70.5612	81.4269
	3	1825	88.2634	75.9632
	1	2000	66.3215	88.2044
5.0	1	2350	9.3214	7.0157
	3	2450	150.6321	141.0598
	3	2275	95.3266	117.3348
5.5	1	1440	65.1236	90.3008
	1	1900	7.1231	8.6777
	1	2200	6.3021	9.0910
6.0	4	1500	130.0123	140.5371
	1	1825	166.2365	151.7169
	1	2050	89.2361	84.5190
6.5	3	1575	163.5896	175.7216
	3	1825	130.3647	148.2724
	1	2200	110.3156	87.3707

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