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金佛山方竹适生土壤特性及其形态多样性调查 总被引：1，自引：2，他引：1
文章实地调查了原生地金佛山方竹的形态多样性及其适宜生长地区的土壤特性。结果表明：1）金佛山方竹适应的土壤范围较广,可适应大娄山区pH值4.0~8.0的各类型土壤;2）金佛山方竹形态多样性表明其天然林是天然杂交群体;3）金佛山方竹特殊的叶形、秆形以及丰富多彩的笋箨及鲜笋颜色,为选育观赏型竹种奠定了基础。研究结果可为扩大金佛山方竹种植面积及良种选育提供参考。 相似文献
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本文对镇雄县金佛山方竹资源现状进行概述,对金佛山方竹资源状况、生长性状等情况进行统计与分析,结果表明:镇雄县境内金佛山方竹生长适应性强,其高、粗生长性状在其主要分布区域随海拔高度增加而逐渐减弱,其立竹密度和竹笋产量已达到行业指标要求。以镇雄县金佛山方竹产业发展成效为基础,并总结管理经验,对镇雄县今后金佛山方竹培植和竹产业发展具有一定参考价值。 相似文献
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盐津县金佛山方竹丰产栽培技术 总被引：1，自引：0，他引：1
金佛山方竹是高寒山区特有经济竹类.本文探讨了金佛山方竹的育苗、栽植、抚育管理等方面的技术措施,期望能为今后金佛山方竹的培育提供技术参考. 相似文献
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金佛山方竹育苗与造竹技术 总被引：2，自引：0，他引：2
金佛山方竹是黔北特有的高山复轴混生竹种,是一种优良的笋材兼用竹种.系统总结出金佛山方竹的苗木培育、造林技术、抚育管理和采伐更新经营管理技术措施. 相似文献
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金佛山方竹笋重模型的建立 总被引：1，自引：0，他引：1
本文以金佛山方竹中心产区的３０５个金佛山方竹个体特征值为基础，采用相关性分析的方法，通过计算机建立方竹笋重与笋径的数学模型，并编制方竹笋经产量表。 相似文献
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天台县林木种质资源及保护利用 总被引：2，自引：0，他引：2
在全县范围采用踏查、走访咨询、标本与资料收集的方法,调查得出天台县共有木本植物86科270属670种。其中有国家重点保护野生植物13种（一级重点保护2种,二级重点保护11种）。本文就天台县对夏蜡梅（Calyeanthus chineiasis Cheng et S．YChang）等四种浙江省珍稀濒危保护植物和天台县特色农家品种天台红朱柿（Diospyroskaki cv．Tiantai．Hongzhu）的保护利用现状进行了概述。并就天台县林木资源特点提出了加强宣传教育、要制止盲目的次生林改造、加强就地保护和迁地保护、做好良种选育和扩大繁殖研究等保护利用建议。 相似文献
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对丽水市１９７５年以来森林资源动态与营林成效进行分析结果看出，经过２０年的人工造林、封山育林，使森林资源持续增长，有林地面积增加，荒山、疏林基本绿化，总体蓄积量回升，林种、龄组结构趋于合理，经济果木林有较大幅度增长，但也存在林分总体素质差、单位面积产量低、人工造林保存率高而效益不理想，封山育林成果巩固难度增大等问题，提出营林工作要转向提高林分内部质量的战略，调整产业结构，大办绿色产业，巩固和扩大绿化成果，提高林业综合效益。 相似文献
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《Scandinavian Journal of Forest Research》2012,27(1):1-6
Abstract The effect of soaking on germination and occurrence of fungal infections on Norway spruce (Picea abies (L.) Karst.) seeds and germinants was studied in three commercial seed lots. Treatments in which seeds were soaked in water for 24 h or in which the water was changed during the soak did not have an effect on the species diversity or on the abundance of the fungi isolated from the seeds. Different fungi were found in different seed lots. Most of those isolated are saprophytic or weakly pathogenic, but pathogens such as Sirococcus conigenus (D.C.) P.F. Cannon &; Minter and Trichothecium roseum (Pers.) Link were also isolated. Soaking increased germination energy but had no effect on final germination percentage. The number of mouldy seeds and germinants with disease symptoms was different among seed lots when seeds were germinated on water agar. When germinated in low humified Sphagnum peat, no differences in the emergence of disease symptoms were observed among seed lots. The frequency of disease was lower in peat than in water agar. Soaking had no effect on disease emergence in germination trials on either water agar or in Sphagnum peat. 相似文献
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Jyrki Hytönen Jussi Saramäki Pentti Niemistö 《Scandinavian Journal of Forest Research》2014,29(1):1-11
The growth, technical quality and nutritional status of pure and mixed silver birch (Betula pendula Roth) and downy birch (Betula pubescens Ehrh.) plantations were studied 21 and 22 years after planting on afforested organic soil arable land and on upland forest soil. In mixtures, 50% of both birch species was planted. Silver birch trees grew better, but had higher mortality than downy birch trees on both sites. Mortality of both species was highest, and the difference in their growth smallest, on organic soil. In pure stands on organic soil, downy birch dominant height, diameter and mean volume were 96%, 92% and 82% of those of silver birch and on mineral soil 87%, 84% and 60%, correspondingly. On mineral soil, silver birch had a higher mean annual increment (MAI) (5.8 m3 ha?1a?1) than downy birch (3.9 m3 ha?1a?1), but on organic soil the MAI of both species was similar (3.3–3.4 m3 ha?1 a?1). Planting birches in mixture did not affect the growth of the trees on organic soil. On mineral soil, the mean diameter and mean volume of silver birch trees were higher in mixed than in pure plantations. The technical stem quality of both tree species was low. On mineral soils, pure silver birch is more productive than mixture, but on peat soil the higher growth of silver birch could contribute to increased productivity and downy birch would ensure sufficient survival for future timber production. 相似文献
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James D. Haywood 《New Forests》2007,33(3):257-279
Recovery of longleaf pine (Pinus palustris P. Mill.) is necessary to arrest the decline of many associated plants and animals, and the establishment of longleaf pine
on much of its original range requires artificial regeneration and diligence. In central Louisiana, USA, two fertilization
levels (No [NF] or Yes [F-36 kg/ha N and 40 kg/ha P]) in combination with three vegetation treatments (check, two prescribed
fires [PF], or multi-year vegetation control by herbicidal and mechanical means [IVM]) were applied to container-grown longleaf
pine plantings in two studies. In Study 1 (grass dominated), 6-year-old longleaf pine survival was 52% on the F–checks, 78%
on the F–PF plots, and averaged 93% on the other four treatment combinations. Longleaf pine trees on the IVM plots (3.4 m)
were significantly taller than on the other two vegetation treatments, and trees on the PF plots (1.8 m) were taller than
trees on the check plots (1.2 m). In Study 2 (brush dominated), survival averaged 65% across the six-treatment combinations
after 6 years. The longleaf pine trees were 4.7 m tall on the IVM plots and averaged 3.9 m tall on the check and PF plots.
Fertilization increased P concentrations in the soil and longleaf pine foliage, while fertilization did not significantly
affect longleaf pine height growth. Native fertility was not apparently limiting longleaf pine development contrary to prior
research recommendations for these soils. In both studies, the IVM treatment reduced early herbaceous competition and the
number and height of arborescent plants. The PF treatment reduced arborescent plant height on the grassy site where fires
were more intense than on the brushy site. 相似文献
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肉桂双瓣卷蛾Polylopha cassiicola是一种严重危害肉桂Cinnamomum cassia和樟C. canphora的害虫。本研究在樟树梢上采集肉桂双瓣卷蛾幼虫,将其室内饲养至化蛹和成虫羽化,观察肉桂双瓣卷蛾蛹和成虫的形态特征。结果发现,雌蛹末端分节不明显,无瘤状突起,生殖孔和排泄孔距离较远;雄蛹在第9腹节有纵裂缝,裂缝较雌蛹长,且两边均呈半球形瘤状突起,生殖孔和排泄孔距离较近;雌蛾腹部末端饱满浑圆,腹部末端有对称黄色长毛簇;雄蛾腹部细长,尾部有整齐棕色短毛簇。以此为标准建立肉桂双瓣卷蛾蛹和成虫雌、雄形态鉴定方法,可准确辨别性比,可以为肉桂双瓣卷蛾种群动态预测和化学生态学研究开展提供参考。 相似文献
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总结了近年来国内花木市场发展趋势及其在国民经济中的重要地位，讨论了世界各国在花木新品种培育方面的研究情况。对目前花木新品种培育、花木栽培方面所采用的主要技术手段和方法进行总结。最后提出了花木育种和栽培研究的发展趋势。 相似文献