26年生红锥杉木混交造林效果分析
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摘要
为探讨营造红锥杉木复层混交林的可行性,以26年生红锥杉木混交林为研究对象,对林分生长量、第2次间伐的效果以及经济效益进行了分析。结果表明:混交林中2个树种的生长量均高于相应的丰产标准,其中杉木的树高和胸径分别较标准高出3.33%、4.67%,红锥的树高和胸径分别较丰产标准高出16.90%、10.36%。混交林中上层红锥存在种内竞争,出现分化倾向,下层杉木作为被压木,表现出明显分化现象,此时开展间伐对林分的健康生长效果较好。26年生混交林的木材总收入452762元/hm~2,总利润241017元/hm~2,年均利润为9270元/hm~2,内部收益率达8.37%,经济效益高于全国营林平均水平,收益较为可观。因此,红锥杉木混交模式及配套技术措施具有较高的推广价值。
In order to study the suitability of mixed forest of Castanopsis hystrix and Cunninghamia lanceolata,the research analysed the growth,effects of the second thinning,and economic benefit of the 26-year-old mixed forest.The results showed that,the growth of Castanopsis hystrix and Cunninghamia lanceolata in mixed forest come up to the standard of fast growing forest. The height and DBH of Cunninghamia increased by 3.33% and 4.67% respectively,compared with the standard. The height and DBH of Castanopsis increased by 16.90% and 10.36% respectively.Intraspecific competition of Castanopsis lead to trend of tree differentiation. Because of huge competition,the suppressed trees Cunninghamia exhibits distinct tree differentiation. Thinning was extremely necessary at that moment.The economical gross income per hectare of mixed forest was 452762 yuan,gross profit per hectare was 241017 yuan and annual average profit per hectare was 9270 yuan. The internal rate of the mixed forest reached 8.37%,and economic performance of the stand was higher than the national average. The mixed mode and its supporting technical measures has high promotion value.
In order to study the suitability of mixed forest of Castanopsis hystrix and Cunninghamia lanceolata,the research analysed the growth,effects of the second thinning,and economic benefit of the 26-year-old mixed forest.The results showed that,the growth of Castanopsis hystrix and Cunninghamia lanceolata in mixed forest come up to the standard of fast growing forest. The height and DBH of Cunninghamia increased by 3.33% and 4.67% respectively,compared with the standard. The height and DBH of Castanopsis increased by 16.90% and 10.36% respectively.Intraspecific competition of Castanopsis lead to trend of tree differentiation. Because of huge competition,the suppressed trees Cunninghamia exhibits distinct tree differentiation. Thinning was extremely necessary at that moment.The economical gross income per hectare of mixed forest was 452762 yuan,gross profit per hectare was 241017 yuan and annual average profit per hectare was 9270 yuan. The internal rate of the mixed forest reached 8.37%,and economic performance of the stand was higher than the national average. The mixed mode and its supporting technical measures has high promotion value.
引文
[1]谭一波,郑威,何峰,等.广西容县红锥天然林凋落物组成及其时间动态[J].中南林业科技大学学报,2015,35(06):7-10.
[2]黄全能,陈东华,代全林,等.红锥天然林土壤理化性质及水源涵养功能的研究[J].福建林业科技,2001(02):17-19,28.
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[4]蔡金清.杉木火力楠混交林疏伐效果试验[J].林业调查规划,2006(04):106-109.
[5]LY/T 1946-2011,红锥丰产栽培技术规程[S].
[6]DB35/T 518-2003,杉木速生丰产林栽培技术规程[S].
[7]陈清根.桉树采伐后改造成桉杉混交林的效应研究[J].桉树科技,2018,35(4):14-19.
[2]黄全能,陈东华,代全林,等.红锥天然林土壤理化性质及水源涵养功能的研究[J].福建林业科技,2001(02):17-19,28.
[3]盛炜彤,杨承栋,范少辉.杉木人工林的土壤性质变化[J].林业科学研究,2003,16(4):377-385.
[4]蔡金清.杉木火力楠混交林疏伐效果试验[J].林业调查规划,2006(04):106-109.
[5]LY/T 1946-2011,红锥丰产栽培技术规程[S].
[6]DB35/T 518-2003,杉木速生丰产林栽培技术规程[S].
[7]陈清根.桉树采伐后改造成桉杉混交林的效应研究[J].桉树科技,2018,35(4):14-19.