Analysis and Research on the Optimal Annual Forest Felling Volume of Forest Management Units

doi:10.13466/j.cnki.lyzygl.2017.04.006

Abstract

Abstract:

Forest harvesting is a key measure to adjust forest structure,improve forest quality and improve forest function.Scientific harvesting management is an important way to achieve sustainable forest management.At present,forest harvesting in our country adopts the harvesting quota management system,and the annual allowable cutting quota of the management units,in principle,shall be determined according to the optimal annual forest felling volume of the forest management plan.Therefore,the calculation and determination of the optimal annual forest felling volume is the important content for drawing up the forest management plan.In this study,how to scientifically calculate and determine the optimal annual forest felling volume in the forest management unit was thoroughly investigated and analyzed in Hongshi Forestry Bureau,Jilin Province,China.The purpose of this study was to provide a reference in the technology and method for forest management units to draw up forest management plan and calculate the optimal annual forest felling volume.

Key words: forest harvesting, optimal annual forest felling volume, forest management plan

CLC Number:

S757.4

OUYANG Junxiang, LU Zeyang. Analysis and Research on the Optimal Annual Forest Felling Volume of Forest Management Units[J]. FOREST RESOURCES WANAGEMENT, 2017, (4): 30-36.

Figures/Tables 5

Tab.1

The area of forest management types in Hongshi Forestry Bureau hm2

序号	经营类型	合计	严格保护	重点保护	保护经营	集约经营
	总计	287535	33756	162959	89664	1156
1	人工红松公益林(1)	4931	47	4884	0	0
2	人工红松公益林(2)	548	56	492	0	0
3	人工红松用材林(1)	1317	0	0	1317	0
4	人工红松针阔混交公益林(1)	429	304	125	0	0
5	人工阔叶混交林公益林(1)	1895	0	1895	0	0
6	人工阔叶混交林公益林(2)	2178	0	2178	0	0
7	人工落叶松公益林(1)	1233	101	1132	0	0
8	人工落叶松公益林(2)	1221	101	1120	0	0
9	人工落叶松用材林(1)	1259	0	0	997	262
10	人工落叶松用材林(2)	894	0	0	0	894
11	人工杨树用材林(1)	580	0	6	574	0
12	人工针阔混交林公益林(1)	1742	233	1509	0	0
13	人工针阔混交林公益林(2)	1034	152	882	0	0
14	人工针阔混交林用材林(1)	1953	0	77	1876	0
15	人工针叶混交林公益林(1)	650	298	352	0	0
16	天然胡桃楸公益林(1)	2898	201	2697	0	0
17	天然胡桃楸公益林(2)	4174	270	3904	0	0
18	天然阔叶混交林公益林(1)	51296	7947	43349	0	0
序号	经营类型	合计	严格保护	重点保护	保护经营	集约经营
19	天然阔叶混交林公益林(2)	96127	19028	77099	0	0
20	天然阔叶混交林公益林(3)	9681	3841	5840	0	0
21	天然阔叶混交林用材林(1)	44567	0	0	44567	0
22	天然阔叶混交林用材林(2)	36136	0	0	36136	0
23	天然蒙古栎公益林(1)	574	90	484	0	0
24	天然蒙古栎公益林(2)	3031	542	2489	0	0
25	天然蒙古栎公益林(3)	795	220	575	0	0
26	天然水曲柳公益林(1)	578	58	520	0	0
27	天然针阔混交林公益林(1)	1402	32	1370	0	0
28	天然针阔混交林公益林(2)	7130	235	6895	0	0
29	天然针阔混交林公益林(3)	3085	0	3085	0	0
30	天然针阔混交林用材林(1)	2392	0	0	2392	0
31	天然针阔混交林用材林(2)	1805	0	0	1805	0

Tab.1

Tab.2

The growth models of the main forests

经营类型	生长模型公式	相关系数
人工红松公益林(1)	y=-0.072x²+8.8499x+1.1827	R²=0.989
人工红松公益林(2)	y=-0.073x²+8.8418x-0.5318	R²=0.989
人工红松用材林(1)	y=0.1264x²+3.5769x+14.759	R²=0.995
人工红松针阔混交公益林(1)	y=-0.157x²+12.804x+14.132	R²=0.989
人工阔叶混交林公益林(1)	y=-0.0591x²+9.0181x+52.794	R²=0.982
人工阔叶混交林公益林(2)	y=-0.0524x²+10.76x+42.046	R²=0.972
人工落叶松公益林(1)	y=0.0242x²+5.6016x+30.898	R²=0.979
人工落叶松公益林(2)	y=-0.092x²+13.52x+1.2555	R²=0.994
人工落叶松用材林(1)	y=-0.122x²+10.025x+53.5	R²=0.962
人工落叶松用材林(2)	y=-0.036x²+5.5663x+37.538	R²=0.978
人工杨树用材林(1)	y=0.0418x²+7.9769x+18.534	R²=0.977
人工针阔混交林公益林(1)	y=-0.1109x²+13.037x+13	R²=0.992
人工针阔混交林公益林(2)	y=-0.1251x²+12.164x+14.102	R²=0.985
人工针阔混交林用材林(1)	y=-0.1055x²+12.761x+21.205	R²=0.989
人工针叶混交林公益林(1)	y=-0.1191x²+11.803x+36.677	R²=0.988
天然胡桃楸公益林(1)	y=-0.028x²+10.486x+6.8857	R²=0.986
经营类型	生长模型公式	相关系数
天然胡桃楸公益林(2)	y=-0.0271x²+10.439x+5.008	R²=0.986
天然阔叶混交林公益林(1)	y=-0.093x²+12.219x+31.151	R²=0.992
天然阔叶混交林公益林(2)	y=-0.0885x²+12.001x+22.271	R²=0.993
天然阔叶混交林公益林(3)	y=-0.0793x²+10.762x+19.972	R²=0.993
天然阔叶混交林用材林(1)	y=-0.1265x²+12.808x+18.657	R²=0.993
天然阔叶混交林用材林(2)	y=-0.1168x²+11.827x+17.229	R²=0.993
天然蒙古栎公益林(1)	y=-0.0298x²+5.3765x+24.721	R²=0.972
天然蒙古栎公益林(2)	y=0.0552x²+7.2568x+2.4742	R²=0.995
天然蒙古栎公益林(3)	y=-0.0552x²+7.9929x+3.6321	R²=0.994
天然水曲柳公益林(1)	y=0.0206x²+6.4583x+28.743	R²=0.990
天然针阔混交林公益林(1)	y=-0.1223x²+14.581x+18.449	R²=0.988
天然针阔混交林公益林(2)	y=-0.1154x²+13.756x+17.406	R²=0.988
天然针阔混交林公益林(3)	y=-0.1072x²+12.781x+16.171	R²=0.988
天然针阔混交林用材林(1)	y=-0.1345x²+13.403x+26.574	R²=0.984
天然针阔混交林用材林(2)	y=-0.1278x²+12.733x+25.246	R²=0.984

Tab.2

Tab.3

Tab.4

Tab.5

Comparison of the main factors for each operation period (5 years)in each plan104 m3

经营期	方案一			方案二			方案三			方案四
经营期	年伐蓄积	林分蓄积	总可收获蓄积	年伐蓄积	林分蓄积	总可收获蓄积	年伐蓄积	林分蓄积	总可收获蓄积	林分蓄积
1	8.42	4796.44	4838.56	12.46	4562.12	4818.69	19.54	4784.15	4881.87	4881.77
2	8.48	5142.93	5227.46	13.40	5052.36	5181.66	21.52	5106.24	5311.55	5307.17
3	8.49	5476.83	5603.81	14.33	5325.22	5526.15	23.2	5405.29	5726.6	5713.68
4	8.97	5793.28	5965.13	15.29	5574.65	5852.02	26.02	5675.06	6126.46	6101.44
5	9.44	6088.86	6307.92	16.16	5798.75	6156.93	27.88	5918.5	6509.29	6463.91
6	9.88	6357.22	6625.69	17.06	5988.37	6431.83	29.64	6129.34	6868.34	6795.14
7	10.3	6591.87	6911.86	17.99	6142.71	6676.12	31.47	6302.31	7198.66	7090.52
8	10.78	6794.20	7168.1	17.96	6272.93	6896.15	34.15	6433.25	7500.36	7347.53
9	11.21	6963.96	7393.9	17.95	6378.76	7091.74	35.01	6535.53	7777.69	7566.05
10	11.67	7103.55	7591.83	17.96	6467.51	7270.3	35.94	6610.83	8032.71	7748.99
11	12.12	7217.3	7766.17	17.95	6545.31	7437.84	36.82	6666.2	8272.19	7901.8
12	12.56	7311.83	7923.48	17.84	6630.53	7612.25	37.74	6709.25	8503.93	8031.76
13	12.92	7392.69	8068.95	17.92	6709.03	7780.37	37.76	6747.79	8731.26	8144.26
14	13.41	7461.05	8204.37	17.90	6787.67	7948.50	37.77	6791.34	8963.64	8244.92
15	13.85	7523.08	8335.67	17.77	6873.03	8122.70	37.50	6844.18	9203.98	8337.89
16	14.33	7578.40	8462.63	17.91	6955.71	8294.93	37.75	6897.07	9445.64	8426.07
17	14.81	7628.67	8586.96	17.91	7023.47	8452.24	37.62	6959.88	9696.57	8510.7
18	15.23	7676.17	8710.63	17.94	7074.63	8593.10	37.51	7024.73	9948.99	8591.89
19	15.61	7720.58	8833.09	17.88	7127.12	8734.99	37.63	7085.87	10198.3	8669.5
20	15.45	7764.29	8954.07	17.94	7183.97	8881.54	37.53	7152.58	10452.67	8742.98
21	16.11	7802.58	9072.89	17.96	7225.53	9012.91	37.79	7209.37	10698.43	8810.39
22	16.11	7843.68	9194.55	17.84	7255.03	9131.61	37.6	7265.80	10942.85	8870.3
23	16.16	7874.66	9306.32	17.88	7282.36	9248.35	37.8	7308.06	11174.12	8922.65
24	16.18	7897.49	9410.04	17.76	7323.52	9378.31	37.73	7346.65	11401.34	8969.02
25	16.15	7920.25	9513.57	18.00	7352.64	9497.43	37.78	7372.41	11615.98	9010.57
26	16.11	7960.74	9634.60	18.31	7433.27	9669.62	37.72	7394.84	11827.03	9047.88
27	16.01	8012.46	9766.39	18.34	7533.59	9861.63	37.79	7406.99	12028.15	9080.68
28	16.16	8033.27	9867.98	18.78	7634.54	10056.50	37.76	7418.88	12228.82	9109.46
29	16.05	8105.37	10020.31	19.04	7664.80	10181.94	37.79	7425.44	12424.35	9136.00
30	16.54	8150.89	10148.54	19.15	7722.00	10334.86	37.83	7425.44	12622.77	9160.92

Tab.5

条件	方案一	方案二	方案三	方案四
1	严格保护类型禁止任何经营活动	同方案一	同方案一	同方案一
	防护林等公益林达到过熟林的林龄才允许更新采伐	同方案一	同方案一
2	采用择伐方式进行主伐和更新采伐,所有林分采伐后龄组不低于近熟林	采用择伐方式进行主伐和更新采伐,公益林要求采伐后林分龄组不低于近熟林,用材林采伐后林分龄组不低于中龄林	采用择伐方式进行主伐和更新采伐,所有林分采伐后龄组不低于中龄林
3	天然公益林最大更新采伐强度不大于20%,人工公益林最大更新采伐强度不大于25%,保护经营类型的天然商品林最大主伐强度不大于25%,保护经营类型的人工商品林最大主伐强度不大于30%;集约经营类型的天然商品林最大主伐强度不大于30%,集约经营类型的人工商品林最大主伐强度不大于35%	公益林最大采伐强度不大于25%,保护经营类型的用材林最大采伐强度不大于35%,集约经营类型的用材林最大采伐强度不大于40%	天然公益林更新采伐最大采伐强度不大于20%,人工公益林更新采伐最大采伐强度不大于25%;保护经营类型的天然商品林主伐最大采伐强度不大于30%,保护经营类型的人工商品林主伐最大采伐强度不大于35%;集约经营类型的天然商品林主伐最大采伐强度不大于35%,集约经营类型的人工商品林主伐最大采伐强度不大于40%	所有林分不进行主伐和更新采伐,全部进行自然修复和演替
4	重点保护类型中的非公益林的采伐要求等同于公益林	同方案一	同方案一
5	任何情况下林木总蓄积不减少,即年采伐量不大于年生长量	同方案一	同方案一

森林类别	合计	幼龄林	中龄林	近熟林	成过熟林
商品林	90903	6482	6928	32189	45304
公益林	162876	31316	110173	13464	7923

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