华北落叶松速生丰产林培育技术(十五) |
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来源: 作者: 发布时间:2013-07-27 11:54 |
表5-4 落叶松人工林胸径与树冠面积实测值理论值比较表 中国苗木网,999miaomu.com 999中国苗木网,999miaomu.com
胸径
999苗木网,999miaomu.com
苗木网,999miaomu.com cm 中国苗木网,www.999miaomu.com 999中国苗木网,www.999miaomu.com 树冠面积(米2)
999苗木网,999miaomu.com 999苗木网,www.999miaomu.com 胸径 999中国苗木网,www.999miaomu.com
999苗木网,999miaomu.com
cm 苗木网,www.999miaomu.com
中国苗木网,www.999miaomu.com
树冠面积(米2) 999苗木网,www.999miaomu.com 999苗木网,www.999miaomu.com 实测值
999中国苗木网,www.999miaomu.com
苗木网,www.999miaomu.com 班论值
999中国苗木网,www.999miaomu.com
999苗木网,999miaomu.com 差值 999苗木网,www.999miaomu.com
999中国苗木网,999miaomu.com
实侧值 999苗木网,999miaomu.com
999苗木网,www.999miaomu.com 班论值 999苗木网,999miaomu.com
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差值
999中国苗木网,www.999miaomu.com 中国苗木网,999miaomu.com 6
999苗木网,www.999miaomu.com 999中国苗木网,www.999miaomu.com 2.516
999苗木网,www.999miaomu.com
999苗木网,999miaomu.com 2.5675 中国苗木网,999miaomu.com
中国苗木网,www.999miaomu.com +0.0515
苗木网,999miaomu.com 中国苗木网,www.999miaomu.com 14
999中国苗木网,www.999miaomu.com
999中国苗木网,999miaomu.com 5.147
苗木网,999miaomu.com 999中国苗木网,www.999miaomu.com 5.684
苗木网,999miaomu.com
中国苗木网,www.999miaomu.com
0.501
苗木网,www.999miaomu.com
苗木网,www.999miaomu.com 7
999苗木网,999miaomu.com 苗木网,999miaomu.com 3.237
999中国苗木网,999miaomu.com
中国苗木网,www.999miaomu.com 2.9856
999苗木网,999miaomu.com
999中国苗木网,999miaomu.com -0.2514 苗木网,999miaomu.com 苗木网,www.999miaomu.com 15 中国苗木网,999miaomu.com 999苗木网,www.999miaomu.com 5.853 999苗木网,999miaomu.com
999中国苗木网,www.999miaomu.com 6.042 999中国苗木网,999miaomu.com
苗木网,www.999miaomu.com 0.187 999苗木网,www.999miaomu.com
苗木网,999miaomu.com 8 999中国苗木网,www.999miaomu.com
999苗木网,999miaomu.com
3.644
999中国苗木网,999miaomu.com
999中国苗木网,999miaomu.com 3.3257 999苗木网,999miaomu.com 中国苗木网,www.999miaomu.com -0.338 999苗木网,999miaomu.com 中国苗木网,999miaomu.com 16 中国苗木网,www.999miaomu.com
中国苗木网,999miaomu.com
6.202 999中国苗木网,999miaomu.com
苗木网,www.999miaomu.com
6.438
苗木网,999miaomu.com
999苗木网,999miaomu.com 0.236
苗木网,www.999miaomu.com 苗木网,999miaomu.com 9
中国苗木网,999miaomu.com
999苗木网,999miaomu.com 4.199 999中国苗木网,www.999miaomu.com 苗木网,999miaomu.com 3.8077
999苗木网,www.999miaomu.com
999苗木网,www.999miaomu.com -0.312
999苗木网,999miaomu.com
999苗木网,999miaomu.com
17
中国苗木网,999miaomu.com 999中国苗木网,999miaomu.com 6.514
999中国苗木网,999miaomu.com
999苗木网,999miaomu.com 6.836 苗木网,999miaomu.com
苗木网,www.999miaomu.com
0.322
999中国苗木网,999miaomu.com
中国苗木网,999miaomu.com 10 中国苗木网,www.999miaomu.com
中国苗木网,999miaomu.com
4.199
苗木网,www.999miaomu.com
999中国苗木网,www.999miaomu.com 4.0918
苗木网,999miaomu.com
999苗木网,www.999miaomu.com -0.0272
999苗木网,999miaomu.com
苗木网,www.999miaomu.com 18
苗木网,www.999miaomu.com
苗木网,999miaomu.com
7.306
中国苗木网,999miaomu.com
中国苗木网,www.999miaomu.com 7.236 中国苗木网,www.999miaomu.com 苗木网,www.999miaomu.com -0.07 苗木网,www.999miaomu.com 999中国苗木网,www.999miaomu.com 11 999苗木网,999miaomu.com 苗木网,www.999miaomu.com 4.227
苗木网,999miaomu.com
999苗木网,www.999miaomu.com 4.4781 999中国苗木网,www.999miaomu.com
苗木网,www.999miaomu.com 0.2511
苗木网,999miaomu.com 中国苗木网,999miaomu.com 19 中国苗木网,www.999miaomu.com 中国苗木网,999miaomu.com 7.645 999中国苗木网,www.999miaomu.com 中国苗木网,www.999miaomu.com 7.6379
999中国苗木网,www.999miaomu.com 999中国苗木网,999miaomu.com -0.0071
999中国苗木网,www.999miaomu.com
苗木网,www.999miaomu.com 12 999苗木网,www.999miaomu.com 999苗木网,www.999miaomu.com 4.600
999中国苗木网,www.999miaomu.com 苗木网,999miaomu.com 4.8659 999苗木网,www.999miaomu.com 中国苗木网,www.999miaomu.com 0.2659 苗木网,999miaomu.com
中国苗木网,www.999miaomu.com
20 苗木网,www.999miaomu.com 中国苗木网,999miaomu.com 8.093
999苗木网,www.999miaomu.com 苗木网,www.999miaomu.com 8.0425 999中国苗木网,999miaomu.com 999中国苗木网,www.999miaomu.com -0.0515
999苗木网,999miaomu.com
999苗木网,www.999miaomu.com 13
999苗木网,www.999miaomu.com 999苗木网,www.999miaomu.com 5.147 999中国苗木网,www.999miaomu.com
999苗木网,www.999miaomu.com 5.2559
中国苗木网,999miaomu.com 999苗木网,999miaomu.com 0.1086
999中国苗木网,999miaomu.com
999苗木网,www.999miaomu.com 21 999中国苗木网,www.999miaomu.com 999中国苗木网,www.999miaomu.com 8.973
苗木网,999miaomu.com
中国苗木网,999miaomu.com 8.4478 999苗木网,999miaomu.com
中国苗木网,www.999miaomu.com -0.525 苗木网,www.999miaomu.com 苗木网,999miaomu.com 999苗木网,www.999miaomu.com
999中国苗木网,999miaomu.com
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有了这个经验方程,就可以推算出落叶松人工林不同的生长阶段,林分的最大密度指标。这个指标自然要大于林分生长状况下的立木密度。然而,落叶松人工林合理的经营管理密度以多大为宜,还需做一些定位研究以获得最确实的数据。目前,以河北省林科院研究的资料参照表明,根据胸径生长与立木密度的相关关系,初步提出落叶松人工林不同胸径生长阶段的经营密度指标如表5-5可供进行抚育时参考。 999中国苗木网,www.999miaomu.com 苗木网,www.999miaomu.com 表5-5 落叶松人工林经营密度管理指标表
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胸径 999中国苗木网,999miaomu.com 苗木网,999miaomu.com (cm)
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最大密度(1.0)(株/公顷)
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999苗木网,999miaomu.com 经营密度(0.7~0.8) 999苗木网,999miaomu.com 中国苗木网,www.999miaomu.com 株/公顷 999中国苗木网,999miaomu.com 999中国苗木网,www.999miaomu.com 胸径(cm) 苗木网,www.999miaomu.com 999中国苗木网,999miaomu.com 最大密度(1.0) 苗木网,www.999miaomu.com
999中国苗木网,999miaomu.com (株/公顷) 苗木网,www.999miaomu.com
999苗木网,www.999miaomu.com 经营密度(0.7~0.8) 苗木网,www.999miaomu.com 中国苗木网,www.999miaomu.com 株/公顷 苗木网,www.999miaomu.com
中国苗木网,www.999miaomu.com
6
999苗木网,999miaomu.com 999苗木网,www.999miaomu.com 3940
999苗木网,999miaomu.com
999中国苗木网,999miaomu.com
2758~3152
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999中国苗木网,999miaomu.com 16
中国苗木网,999miaomu.com 999苗木网,999miaomu.com 1540
999中国苗木网,999miaomu.com 999中国苗木网,999miaomu.com 1078~1232 999中国苗木网,www.999miaomu.com
中国苗木网,999miaomu.com
7 中国苗木网,www.999miaomu.com
999苗木网,999miaomu.com
3392
999中国苗木网,www.999miaomu.com
中国苗木网,www.999miaomu.com 2374~2714 999中国苗木网,www.999miaomu.com 中国苗木网,www.999miaomu.com 17
999苗木网,www.999miaomu.com
中国苗木网,999miaomu.com 1456
苗木网,999miaomu.com
苗木网,999miaomu.com 1019~1165 999苗木网,999miaomu.com 999苗木网,999miaomu.com 8 999中国苗木网,www.999miaomu.com
中国苗木网,www.999miaomu.com
2980 999苗木网,www.999miaomu.com 苗木网,www.999miaomu.com 2086~2384 999苗木网,www.999miaomu.com 999中国苗木网,www.999miaomu.com 18 苗木网,999miaomu.com 999苗木网,www.999miaomu.com 1380 中国苗木网,www.999miaomu.com 999苗木网,www.999miaomu.com 966~1104 999苗木网,999miaomu.com
999苗木网,www.999miaomu.com 9 苗木网,www.999miaomu.com
999中国苗木网,www.999miaomu.com
2670 中国苗木网,www.999miaomu.com
999苗木网,www.999miaomu.com
1869~2136
999中国苗木网,999miaomu.com
999中国苗木网,www.999miaomu.com 19 中国苗木网,999miaomu.com
苗木网,999miaomu.com 1311
999中国苗木网,www.999miaomu.com 999苗木网,www.999miaomu.com 901~1050
苗木网,999miaomu.com
999苗木网,www.999miaomu.com 10 苗木网,999miaomu.com 中国苗木网,www.999miaomu.com 2404
999苗木网,999miaomu.com
中国苗木网,999miaomu.com 1683~1923 999苗木网,www.999miaomu.com
999中国苗木网,www.999miaomu.com
20 苗木网,www.999miaomu.com
999中国苗木网,www.999miaomu.com 1252 苗木网,www.999miaomu.com
中国苗木网,999miaomu.com
876~1002
中国苗木网,www.999miaomu.com
苗木网,999miaomu.com 11 999中国苗木网,999miaomu.com 中国苗木网,www.999miaomu.com 2195
苗木网,999miaomu.com
中国苗木网,www.999miaomu.com 1537~1756
中国苗木网,www.999miaomu.com
999苗木网,www.999miaomu.com 21
苗木网,www.999miaomu.com 中国苗木网,999miaomu.com 1198 苗木网,999miaomu.com 中国苗木网,999miaomu.com 839~958
中国苗木网,999miaomu.com
999中国苗木网,www.999miaomu.com 12 999中国苗木网,www.999miaomu.com
999中国苗木网,999miaomu.com 2020 999苗木网,www.999miaomu.com
999苗木网,999miaomu.com
1414~1616 苗木网,999miaomu.com 999中国苗木网,www.999miaomu.com 22 中国苗木网,www.999miaomu.com
999苗木网,999miaomu.com
1148
苗木网,999miaomu.com
999中国苗木网,www.999miaomu.com
804~918 中国苗木网,www.999miaomu.com 999中国苗木网,999miaomu.com 13
999苗木网,999miaomu.com
999中国苗木网,www.999miaomu.com 1873
中国苗木网,www.999miaomu.com
中国苗木网,999miaomu.com 1311~1498
中国苗木网,www.999miaomu.com
苗木网,999miaomu.com
23
中国苗木网,www.999miaomu.com
苗木网,www.999miaomu.com
1102
中国苗木网,www.999miaomu.com
999中国苗木网,999miaomu.com
771~882
苗木网,999miaomu.com
苗木网,www.999miaomu.com 14
中国苗木网,999miaomu.com
苗木网,www.999miaomu.com 1746
999中国苗木网,999miaomu.com 999苗木网,www.999miaomu.com 1222~1397 999中国苗木网,999miaomu.com 999中国苗木网,www.999miaomu.com 24 中国苗木网,999miaomu.com
苗木网,www.999miaomu.com 1060 苗木网,www.999miaomu.com
中国苗木网,999miaomu.com
742~848
999中国苗木网,999miaomu.com 999中国苗木网,www.999miaomu.com 15 苗木网,999miaomu.com 中国苗木网,www.999miaomu.com 1636
中国苗木网,www.999miaomu.com
中国苗木网,999miaomu.com 1145~1309 苗木网,www.999miaomu.com
苗木网,999miaomu.com
25
中国苗木网,999miaomu.com 苗木网,999miaomu.com 1022
999苗木网,999miaomu.com 苗木网,www.999miaomu.com 715~818
苗木网,www.999miaomu.com 999中国苗木网,www.999miaomu.com 苗木网,999miaomu.com如:孟滦林管局龙头山林场的落叶松人工林中,经过调查,现有林分密度为2170株/公顷,林分的平均胸径为11.6厘米,查经营密度管理指标表,当林分平均胸径在12厘米时,相应的林分密度为1616株/公顷,或1614株/公顷,而现有林分密度为2170株/公顷,显然有些过密,则需抚育间伐554~756株/公顷,其间伐强度为20%~30%,这才适应林分立木的正常生长。抚育后当林分直径生长到15~17厘米时,就得进行下一次抚育间伐。 苗木网,999miaomu.com 999苗木网,999miaomu.com 在应用经营密度管理指标表时,由于有的林分当时初植密度过密,而抚育时间又晚,在进行第一次抚育间伐时,若一次间伐到合理的经营密度管理指标时,恐抚育后的林分立木在短期内发生畸型变化,如拉弓等。因此在确定保留株数时,可以适当提高一些,使其逐步过渡到合理的经营管理密度。
999苗木网,www.999miaomu.com
999中国苗木网,www.999miaomu.com 龙头山林场总结了落叶松人工林抚育间伐的经验,根据胸高直径,相应的林龄与保留株数的关系,制定了“抚育间伐标准参考表”(表5-6)。
中国苗木网,www.999miaomu.com 999苗木网,999miaomu.com 表5-6 抚育间伐标准参考表
苗木网,www.999miaomu.com 中国苗木网,999miaomu.com 林分
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999苗木网,999miaomu.com 间伐开始 中国苗木网,www.999miaomu.com 999中国苗木网,999miaomu.com 保留株数 中国苗木网,www.999miaomu.com
999中国苗木网,www.999miaomu.com
间伐强度 苗木网,www.999miaomu.com
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间隔期(年)
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直径(cm) 中国苗木网,999miaomu.com
999苗木网,999miaomu.com 年龄(年)
999中国苗木网,www.999miaomu.com 中国苗木网,999miaomu.com 株/公顷
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苗木网,999miaomu.com 株数(%)
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999中国苗木网,www.999miaomu.com 材积(%)
999中国苗木网,999miaomu.com
苗木网,www.999miaomu.com 落叶松人工林 999苗木网,999miaomu.com 中国苗木网,www.999miaomu.com 5~6
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999中国苗木网,www.999miaomu.com 10~12
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3500~4000
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中国苗木网,999miaomu.com 35~40 中国苗木网,999miaomu.com 999中国苗木网,999miaomu.com 20~25 中国苗木网,www.999miaomu.com
中国苗木网,www.999miaomu.com
4~5 999苗木网,www.999miaomu.com
999中国苗木网,www.999miaomu.com
8~10
999苗木网,www.999miaomu.com
999苗木网,999miaomu.com 15~18
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苗木网,999miaomu.com 2000~2500 中国苗木网,999miaomu.com 中国苗木网,999miaomu.com 30~35
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999中国苗木网,www.999miaomu.com
20~25
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999苗木网,www.999miaomu.com 4~5
中国苗木网,999miaomu.com
999中国苗木网,www.999miaomu.com
12~16
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999中国苗木网,999miaomu.com 20~25 999苗木网,999miaomu.com 999中国苗木网,www.999miaomu.com 1200~1600 苗木网,www.999miaomu.com 999苗木网,999miaomu.com 30~35
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999中国苗木网,www.999miaomu.com 20~25
苗木网,999miaomu.com 苗木网,www.999miaomu.com 5~6 中国苗木网,999miaomu.com
苗木网,www.999miaomu.com 18~24 中国苗木网,www.999miaomu.com
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28~36 999中国苗木网,www.999miaomu.com 999苗木网,999miaomu.com 800~1000 999苗木网,999miaomu.com 中国苗木网,999miaomu.com 25~30
999中国苗木网,999miaomu.com 999苗木网,999miaomu.com 20~25
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999苗木网,999miaomu.com
5~6 中国苗木网,999miaomu.com
999中国苗木网,999miaomu.com
苗木网,999miaomu.com 中国苗木网,999miaomu.com 2、按伐后保留木应有的平均直径确定保留株数 下式为乌道特经验式: 苗木网,www.999miaomu.com 999苗木网,www.999miaomu.com N=10000/(0.164d*d的开方)
999苗木网,999miaomu.com
中国苗木网,www.999miaomu.com 式中:0.164——系数; 中国苗木网,www.999miaomu.com
中国苗木网,999miaomu.com N——伐后保留株数;
中国苗木网,999miaomu.com 苗木网,www.999miaomu.com d——保留木平均直径。 999中国苗木网,999miaomu.com
999苗木网,www.999miaomu.com
用标准地对这个公式的检查,认为在大多数的情况下是适用的。运用这个公式确定间伐强度,必须事先根据所采用的抚育间伐方法估算保留木的平均直径。
中国苗木网,999miaomu.com
中国苗木网,999miaomu.com
依据十六年生落叶松人工林调查、统计、计算、分析结果,在运用下层疏伐前,以乌道特公式所计算保留木应有株数:
999中国苗木网,www.999miaomu.com
中国苗木网,www.999miaomu.com
N=10000/(0.164*9*9的开方) = 2258(9为保留木可达的D) 中国苗木网,999miaomu.com 中国苗木网,999miaomu.com 以这个数据与应用其它几种计算方法所计算的每公顷适宜的保留株数为1750O~2250株作比较,这个公式是可以参考应用的。 苗木网,www.999miaomu.com |
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