Developing Individual Tree Diameter Growth Rate Models for Major Tree Species in Inner Mongolia

doi:10.13466/j.cnki.lyzygl.2018.02.008

Abstract

Abstract:

Based on the mensuration data of diameter at breast height (DBH) from about 120 thousand survival trees in Inner Mongolian forest inventory 2013 of the 8th National Forest Inventory in China,individual tree DBH growth rate models for major tree species were developed for two modeling populations,Inner Mongolian Autonomous Region (I) and Inner Mongolian Key State-owned Forest Management Bureau of Daxing’anling (II).For some tree species with a wide range of distribution in modeling population I,dummy modeling approach was used to develop DBH growth rate models suitable for eastern,central and western regions.The results showed that determination coefficients (R ²) for most tree species were more than 0.96,and mean prediction errors (MPE) were less than 1%,when DBH growth rate models were used to estimate diameters at the end of interval period.The developed DBH growth rate models would provide quantitative basis for determining whether the DBH growth of trees is too large in field survey of Inner Mongolian forest inventory of the 9th National Forest Inventory.

Key words: growth rate model, continuous forest inventory, survival tree, dummy variable, Inner Mongolia

CLC Number:

S711
S758

ZENG Weisheng, CHEN Xinyun, YANG Xueyun. Developing Individual Tree Diameter Growth Rate Models for Major Tree Species in Inner Mongolia[J]. FOREST RESOURCES WANAGEMENT, 2018, (2): 38-42.

Figures/Tables 6

Tab.1

Fig.1

Fig.2

Tab.2

Tab.3

Tab.4

References 10

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建模总体	树种组	样木株数 /株	样本单元数 /株	胸径范围 /cm
内蒙地方	云杉	175	122	5.0~51.0
	落叶松	4008	512	5.0~75.6
	樟子松	924	358	5.0~58.6
	油松	1260	258	5.0~38.7
	其它松	32	32	5.1~23.2
	柏木	23	23	5.4~20.7
	栎类	10001	429	5.0~53.5
	白桦	10751	576	5.0~52.6
	其它桦	5462	425	5.0~54.1
	榆树	805	364	5.0~38.8
	椴树	90	57	5.0~22.0
	杨树	4651	542	5.0~44.6
	柳树	513	329	5.0~67.8
	其它硬阔	357	157	5.0~42.0
	其它软阔	3407	368	5.0~86.3
内蒙森工	落叶松	30142	475	5.0~83.7
	樟子松	584	275	5.0~61.0
	栎类	8189	300	5.0~47.0
	白桦	28100	373	5.0~48.7
	其它桦	2096	293	5.0~50.5
	柳树	347	127	5.0~47.0
	其它硬阔	38	34	5.2~27.7
	其它软阔	7933	316	5.0~56.0

建模总体	树种组		模型		参数估计值				评价指标
建模总体	树种组		模型		a		b		R²		S
内蒙地方	云杉	(4)		0.1041		6.4058		0.254		0.484
	落叶松	(2)		3.2650		0.0297		0.428		0.643
	樟子松	(2)		5.2534		0.0508		0.241		1.612
	油松	(4)		0.6637		12.0389		0.167		1.091
	栎类	(3)		0.1796		0.0555		0.712		0.302
	白桦	(4)		0.2959		12.8486		0.665		0.365
	其它桦	(1)		7.9685		0.7867		0.555		0.400
	榆树	(2)		5.5968		0.0626		0.254		1.583
	椴树	(3)		-0.3435		0.1309		0.519		0.700
	杨树	(4)		0.3995		52.0960		0.642		1.694
	柳树	(2)		4.9753		0.0266		0.074		2.653
	其它硬阔	(1)		6.2198		0.5287		0.068		1.421
	其它软阔	(4)		0.4679		16.7401		0.512		0.676
内蒙森工	落叶松	(2)		3.5014		0.0551		0.949		0.159
	樟子松	(3)		0.1014		0.0589		0.521		0.546
	栎类	(3)		0.1028		0.0718		0.794		0.226
	白桦	(1)		10.0884		0.8754		0.888		0.166
	其它桦	(2)		3.3288		0.0627		0.733		0.367
	柳树	(3)		-0.0218		0.0544		0.421		0.987
	其它硬阔	(2)		2.5562		0.0446		0.180		0.841
	其它软阔	(4)		0.2556		15.3740		0.830		0.277

树种组	模型	区域	参数估计值		评价指标
树种组	模型	区域	a	b	R²	S
落叶松	(2)	东部	2.7056	0.0240	0.496	0.606
落叶松	(2)	中部	3.9098	0.0352	0.496	0.606
樟子松	(2)	东部	2.9777	0.0296	0.589	1.190
樟子松	(2)	中部	15.6188	0.0991	0.589	1.190
油松	(4)	中部	0.8566	17.281	0.761	0.587
油松	(4)	西部	0.3757	1.9309	0.761	0.587
栎类	(3)	东部	0.0673	0.0673	0.759	0.277
栎类	(3)	中部	0.4401	0.0262	0.759	0.277
其它桦	(1)	东部	12.4492	0.9166	0.668	0.346
其它桦	(1)	中部	4.6033	0.6326	0.668	0.346
杨树	(4)	东部	-0.8747	59.048	0.720	1.504
		中部	0.3942	44.561
		西部	1.0552	56.905

建模总体	树种组	模型	R²	S/cm	MPE/%	MPSE/%
内蒙地方	云杉	(4)	0.997	0.42	0.43	2.75
	落叶松	(2)	0.985	0.96	0.20	5.95
	落叶松	(2)^*	0.985	0.95	0.20	5.77
	樟子松	(2)	0.978	1.26	0.43	6.94
	樟子松	(2)^*	0.983	1.12	0.39	5.47
	油松	(4)	0.961	0.93	0.46	7.20
	油松	(4)^*	0.970	0.81	0.40	6.21
	栎类	(3)	0.989	0.51	0.10	4.23
	栎类	(3)^*	0.989	0.50	0.10	4.25
	白桦	(4)	0.986	0.72	0.10	5.13
	其它桦	(1)	0.986	0.66	0.14	4.70
	其它桦	(1)^*	0.987	0.64	0.14	4.77
	榆树	(2)	0.961	1.22	0.67	8.25
	椴树	(3)	0.992	0.36	0.76	3.60
	杨树	(4)	0.866	2.29	0.45	14.41
	杨树	(4)^*	0.872	2.24	0.44	13.83
	柳树	(2)	0.904	2.92	1.43	14.18
	其它硬阔	(1)	0.961	0.83	0.93	6.50
	其它软阔	(4)	0.977	0.75	0.23	6.40
内蒙森工	落叶松	(2)	0.985	0.90	0.08	6.10
	樟子松	(3)	0.997	0.65	0.27	3.62
	栎类	(3)	0.993	0.48	0.11	4.14
	白桦	(1)	0.988	0.62	0.06	4.47
	其它桦	(2)	0.990	0.73	0.24	5.27
	柳树	(3)	0.981	0.84	2.25	4.93
	其它硬阔	(2)	0.973	0.94	0.87	6.95
	其它软阔	(4)	0.987	0.67	0.11	4.81

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