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20年生加勒比松种源试验研究 总被引：2，自引：0，他引：2
1984年在广东雷州半岛遂溪进行加勒比松种源试验，共有3个变种，9个种源，用当地湿地松作对照。20年生种源试验林生长结果表明，正种加勒比松可在我国热带及南亚热带沿海地区发展，它生长快，保存率高，干形通直，无严重病虫害，抗风力较强，适宜在沿海贫瘠沙地及砖红壤上生长。洪都拉斯加勒比松不适合在我国热带沿海地区发展，其幼树病虫害严重，20年生保存率仅19％，抗风力也较差，但采用生长较快、表现较好的波布顿种源，可在热带及南亚热带内陆地区发展，其中生长快的优良单株，可选用作杂交松的亲本。巴哈马加勒比松生长与正种加勒比松相似，干形通直，但原产巴哈马珊瑚岛上，为浅根性树种，抗风力差，只能在我国南亚热带少台风地区的中性土壤发展。湿地松生长远较加勒比松差，但抗风力强，干形通直，木材密度高，可用作杂交松的亲本。 相似文献
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本文选取了纬度，年均温和年均降水量具个与外引松生长发育密切相关的因子，运用模糊相似优先比的方法对研究区引种外引松进行了气候适宜性的研究，进而将研究区区划为火炬松区，温地松与巴哈马加勒比松区，巴哈马加勒比松与湿地松区，正种加勒比松与巴哈马加勒比松区等４个气候适宜区。 相似文献
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13年生加勒比松种源生长、选择及材性研究初报 总被引：3，自引：0，他引：3
广东雷州半岛加勒比松种源试验共有三个变种９个种源，用湿地松作对照，１３年生种源试验表明在我国热带沿海地区（雷州半岛及海南东部）应发展正种加勒比松，因它生长快，干通直，无严重病虫害，抗风力较强，可在沿海沙地及砖红壤上生长，其木材密度（４５３９公斤／立方米）超过其它两个变种，为优良纸浆材及建筑材树种。洪都拉斯加勒比松不适合在我国热带沿海地区发展，因其幼树病虫害严重，保存率低，抗风力也较差，但可在我国热带及南亚热带内陆地区发展。湿地松不适合在此地区（热带及南亚热带）发展，其生长远较加勒比松差，但抗风力较强，干通直，木材密度高可作杂交松亲本。巴哈马加勒比松可在南亚热带中性土上扩大发展。 相似文献
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利用4类松树杂种(火炬松×洪都拉斯加勒比松、火炬松×巴哈马加勒比松、湿地松×洪都拉斯加勒比松、湿地松×巴哈马加勒比松)在浙北7 a和6类松树杂种(火炬松×洪都拉斯加勒比松、火炬松×本种加勒比松、火炬松×巴哈马加勒比松、湿地松×洪都拉斯加勒比松、湿地松×本种加勒比松、湿地松×巴哈马加勒比松)在皖南9 a的树高、胸径和材积指标,研究了不同杂种在不同地点的生长表现。结果表明:不同杂种类型在不同地点的生长差异非常显著。在浙北余杭试验点火炬松×洪都拉斯加勒比松生长最好,其中材积增长超过对照40%的杂交组合有PTCH20、PTCH12、PTCH41、PTCH17、PTCH61和PTCH16共6个,全部是火炬松×洪都拉斯加勒比松,占该试验点所有杂交组合的11.11%;在皖南太湖试验点生长较好的杂交组合多为湿地松×古巴本种加勒比松,少量为湿地松×洪都拉斯加勒比松,同时该地区火炬松×洪都拉斯加勒比松杂种也有生长较好的杂交组合,该地区优良杂交组合(材积超过对照40%)包括PECC1-37、PECH12-9、PTCH13-24、PECC18-55、PECH42、PECC18-32、PECC10-6共7个,占所有杂交组合的28%,包括3个杂交组合类型(湿地松×本种加勒比松、火炬松×洪都拉斯加勒比松、湿地松×洪都拉斯加勒比松)。该结论和国内外关于杂种松的适应性及生长优势研究的结论基本一致,对我国南方不同地区发展速生杂种松具有参考意义。 相似文献
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<正> 我所1964年开始引种原产古巴的加勒比松Pinus Caribaea Morelet,1973、1974年又陆续引进少量洪都拉斯和巴哈马加勒比松种子试种。从古巴引进的加勒比松现在生长最佳,每亩保留100-130株左右,下面介绍其生长特性: 一、引种栽培的结果 (一)主要生物学特性 1.抽梢加勒比松与乡土的马尾松及引进的湿地松不同,林内树木一年四季均有新梢萌动和发叶,但春、秋比夏、冬快,平均一年可抽梢5—6次,间歇期一般60天左右,冬季最长3个月左右。 相似文献
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加勒比松与湿地松杂交育种试验 总被引：7，自引：4，他引：7
《广东林业科技》1994,(4):23-27
进行了本种加勒比松（加勒比松，下同）与湿地松种内、种间杂交试验，结果表明：（１）加勒比松与湿地松杂支的杂种（Ｆ１）幼林，８年生前生长较好，杂种优势明显，９年生后其杂种优势减弱；（２）加勒比松种内杂交的杂种（Ｆ１）幼林杂种优势明显，１０年生时杂种优势下降的速度较种间的慢；（３）加勒比松分别与洪都拉斯和巴哈马两个变种杂交的杂种优势不明显。 相似文献
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广东省加勒比松遗传改良策略的探讨 总被引：10，自引：3，他引：7
文章概述了我省于 2 0世纪 60年代开展的加勒比松引入及其一系列的遗传改良研究工作 :包括本种、洪都拉斯和巴哈马加勒比松的引种及种源试验 ;优树的选择及种子园营建技术 ;种质资源的收集与利用。并就过去在研究方向存在的问题 ,提出了今后的对策及具体解决方法。 相似文献
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IntroductionGaPSinforestSwereoftenfomledduetobigtreesfalldown.Regenerationandgrowtl1inthegapsincreasebe-causeofIheAnprovementoflightcondition-Thegapwillbefilledwithnewregeneratedtrees.Wattnamedtl1isforesIdynamicsastheforestgrowtllcycle.SinceD.Bot-kindevelopedthefirstGapmo`Iel(JANOWAnlodel)basedontheforestgrowthcycletheory,dleresearchongapmodelbecameoneofthemostactivedirectio11slilecologybecauseofJANoWAnlodeI'ssuccess.H.Sl1ug-artandhisstUdentSmadegreatc()ntributio11stogapmodeI'sdeve… 相似文献
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湿加松优良家系丰产林生长表现 总被引：6，自引：3，他引：3
利用广东省湿加松良种选育协作组研制的14个优良杂种家系的扦插苗木在广东省台山市红岭种子园内营建试验示范林7 hm2,利用优良杂种家系的混合扦插苗木在广东省台山市赤溪镇营建丰产林120hm2。试验示范林5.5年生时的数据表明,优良家系扦插苗木的树高、胸径、材积生长可达到6.69 m,11.31cm,0.03603 m3,其材积生长比作为对照的湿地松、洪都拉斯加勒比松分别大136.59%,15.49%;3.5年生的丰产林的平均树高、胸径、材积分别为3.50 m,5.62 cm,0.0054 m3,材积生长比作为对照的湿地松大350%。该结果充分显示了湿加松优良家系的生长优势,说明湿加松可在广东中南部地区通过扦插扩繁、大量推广。 相似文献
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利用我国湿地松分布区内２２２个气象站点的１０ａ气候资料的平均值，用主成分分析法，将湿地松栽培区划分为４个立地气候区，即：Ⅰ．南亚热带、热带沿海立地气候区；Ⅱ．中亚热带丘陵立地气候区；Ⅲ．暖温带、北亚热带丘陵、平原、岗地立地气候区；Ⅳ．湘、鄂、川接壤山地，四川盆地，黔东南立地气候区．再在各气候区内实测有代表性的８～１０ａ的湿地松标准地１７１块，分别采用平均胸径、平均树高、平均单株材积证实各气候区内湿地松生长差异．这４个立地气候区可作为湿地松人工林立地类型划分、立地质量评价等经营数表编表单元的依据． 相似文献
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ABSTRACT A growing concern exists over the decreasing proportion of Scots pine (Pinus sylvestris L.) trees in mixed Trojan fir (Abies nordmanniana subsp. equi-trojani [Asch. & Sint. Ex Boiss] Coode & Cullen)-Scots pine forests in northern Turkey. Given the changes in mean annual temperature and annual precipitation for the last 40 years in the region, understanding of the sensitivity of Trojan fir and Scots pine trees to changing climate seems to be critical so that better management strategies can be developed against the potential climate extremes of the future in the region. Moreover, our knowledge on the influence of current silvicultural methods on seedling density and growth in these forests is limited. Therefore, in this study, the growth response (i.e., radial growth) of Trojan fir and Scots pine trees to the changing climate were examined. In addition, the influence of current silvicultural practices on seedling growth and density in these forests was also monitored. Trojan fir appeared more sensitive to the climatic variables (i.e., temperature and precipitation) than Scots pine in the region. It was also found that the current silvicultural practices might favor Trojan fir over Scots pine in these forests. Natural dynamics and current silvicultural implications would benefit Trojan fir, however, given the species’ potential sensitivity to the changing climate, current silvicultural approaches can be modified to favor Scots pine, and to increase the resilience of these forests against climate extremes expected in the region’s future. 相似文献
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lllehardt`ood-Korcanpincforcstsintl1cXiaoxinganMts.havebecncxtCnsivclycx-ploitcdsinccl948forn1orethan4oycars.Uptono`t.thcrcarcIiuIcKorcanpincresourccstobecxploitedinmostbureaus(rCgions),andthercare2/3ofbureaus(regions)havingPoOrKoreanpincrcsourccs.Inl95Os,Korcanpincforestsoccupicd53.8%ofthcforestcdarcaand74.3%ofthevolumcinthewholercgion.NaturaIKoreanpineforesthasgrcatlydc-creasedto5.4%and9.8%initsareaandvol-umeresPectively,andthcarcaandvoIuncofhardx`oodforcstincrcascdcorrcsPOndingIy.ln… 相似文献
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应用“八五”国家攻关课题“主要工业用材林施肥技术研究”及前人的研究成果，论证和确定了林木有效施肥条件和肥效目标.我国杉木施肥的有效立地指数区间为[10,18]；林木施肥的最佳经济效益目标增量与立地指数和单位产出价值成正相关，与不施肥的产量、优势木的平均养分浓度及单位投入价值成反相关；在自然上壤肥力状况下，氮磷钾均为高目标肥效的限制因子． 相似文献
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Andrew Youngblood 《Forest Ecology and Management》2011,261(5):937-947
The United States Department of Agriculture (USDA) Forest Service celebrated the 100th anniversary of its network of experimental forests in 2008. For a century, the network of experimental forests have contributed immensely—both in the US and around the world—to the practical understanding of the environment and to the formation of management approaches and policies that affect our use of forests and the natural resources they contain. Experimental forests provide places for long-term science and management studies in major vegetation types across the 789,140 km2 of public land administered by the Forest Service. They also provide an incredible wealth of records and knowledge of environmental change in natural and managed forest ecosystems across the United States. Pringle Falls Experimental Forest (Pringle Falls), southwest of Bend, Oregon, is the oldest experimental forest in the Pacific Northwest and is the site of some of the earliest forest management and silviculture research in this region. Research at this site began in 1914, and it was formally established as part of the national network of experimental forests in 1931 as a center for silviculture, forest management, and insect and disease research in ponderosa pine forests east of the Oregon Cascade Range. As part of the celebration of the Centennial Anniversary of the network of experimental forests, it is timely to examine a few of the ecological lessons that have resulted from long-term studies at Pringle Falls. Two different yet interconnected themes are traced: (1) management of existing old-growth ponderosa pine; and (2) management of young or immature ponderosa pine. Examples of ecological lessons, drawn from long-term studies established or followed by James W. Barrett, Matt D. Busse, Patrick H. Cochran, Walter G. Dahms, F. Paul Keen, Ernest L. Kolbe, Edwin L. Mowat, William W. Oliver, Ram Oren, Chester T. Youngberg, and Jianwei Zhang illustrate how work at Pringle Falls has both pursued and influenced societal demands for forest management strategies, and how this trajectory has cycled back to the themes under which the experimental forest was first established. Finally, these two themes are integrated as drivers for new landscape-scale long-term research at Pringle Falls, designed to evaluate the effects of thinning and fuel reduction treatments on multiple, interacting forest stresses of fire, insects, wind, and climate change. 相似文献