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永川慈竹纸浆林集约栽培合理结构研究 总被引：3，自引：0，他引：3
通过对慈竹纸浆林集约栽培合理结构的研究,将竹丛密度、母竹年龄结构、抚育措施3个因素组装配套,多点试验,以期找到三者的最佳组合。经对试验数据统计分析表明,竹丛株数对新竹产量影响最大。 相似文献
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腾冲红花油茶产业发展问题与措施 总被引：4，自引：3，他引：1
腾冲红花油茶是油茶主要栽培物种之一,加快其产业发展对实现国家食用油发展战略具有重要作用.分析了腾冲红花油茶的产业发展现状、存在问题以及发展的有利因素,提出了科学、细致规划,发掘优良种质资源,总结、引进和组装配套丰产栽培技术,加强龙头企业建设等产业发展的具体策略与措施. 相似文献
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对杜仲、农作物、蔬菜（简称“杜农蔬”）立体栽培作了研究,提出了平原农区适宜的立体栽培模式及与此配套的良种壮苗和栽培技术措施,并分析了立体栽培模式对小气候的影响。 相似文献
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在多年的红锥栽培试验研究的基础上,总结了育苗、造林地选择、混交造林技术、造林密度、抚育管理等红锥速生丰产的组装配套栽培技术。在广西已推广造林6500多hm~2,8～12年生的速生丰产示范林蓄积达155.8m~3/hm~2。 相似文献
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金顶谢花酥梨是河南省名优果品之一，栽培历史悠久，畅销国内外。近年来发展很快，效益显著。把传统栽培方法与现代科学技术组装配套，总结出“一优双高”综合丰产栽培管理技术，可供各地参考。 相似文献
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马尾松速生丰产林优化栽培模式及应用 总被引：1，自引：0，他引：1
根据世界银行贷款国家造林项目（NAP）所设置的优良种源，栽植密度，密度管理（疏伐）整地方式，幼林施肥等项内容的试验研究与生产实践，将有科学依据与生产适用的技术通过优化组装配套成马尾松速生丰产林优化栽培模式。栽培模式根据培养目标（小，中，大径材），分别按立地(14,16,18,20指数）与主伐年龄（20，25，3年），提出量化的造林技术，管理措施，材脂产量以及经营效益供生产参考。 相似文献
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江苏省林业三新工程项目是省政府用于引导和扶持省林业科技成果转化和推广的专项资金项目,是全省林业科技项目的重要组成部分。该文总结回顾了绿色江苏建设以来,省林业三新工程项目通过林业新品种、新技术、新模式的组装配套、典型示范、推广应用,在"促进生态面貌持续改善、促进林业产业转型升级、促进林业灾害有效防控、促进广大林农提升素质"等方面取得的成效,分析了项目管理和实施中存在的不足,提出"提升林业科技支撑能力、创新林业科技管理方式、加强项目单位和执行专家管理、促进产学研企优势合作"等实施项目的建议措施。 相似文献
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本文对广元市9个核桃良种的生长表现及坚果经济性状进行了分析。结果表明:(1)广元现有良种具有生长势中等偏强,具备丰产、稳产特性。同时,本地核桃品种多样性丰富,在特色品种开发方面,仍然有较大空间。(2)广元现有良种果形端正,果壳厚薄适中,坚果内褶壁基本退化,隔膜膜质,稀有革质,多数取仁易,出仁率高。在以后的品种推广中,应大力发展蜀朝2号、青川1号、旺核1号等品种果型大、出仁率高、耐储运的良种。(3)根据变异分析得出,三径均值、粗脂肪含量、出仁率变异系数较低,说明这些指标的遗传稳定性较高。(4)单果重、三径、壳厚、出仁率、粗脂肪含量、粗蛋白含量两两之间存在一定的相关性。这些相关性结果对于研究区域内核桃性状变异、性状指标间变化规律具有一定的指导意义。 相似文献
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Arthropod diversity in alley cropped black walnut (Juglans nigra L.) stands in eastern Missouri, USA
W. Terrell Stamps Terryl W. Woods Marc J. Linit Harold E. Garrett 《Agroforestry Systems》2002,56(2):167-175
Knowledge of the complex interactions among trees, crops and their associated fauna is necessary to determine the viability of a particular agroforestry practice. Information is lacking concerning these interactions, particularly in temperate agroforestry practices. We examined the effects of two forages on the growth, nut production, and arthropod communities of alley cropped eastern black walnut, Juglans nigra L. Experimental plots of eastern black walnut, intercropped with alfalfa, Medicago sativa L., smooth bromegrass, Bromis inermis Leyss., or no vegetation were sampled with sweep nets prior to each cutting date for the forages. Comparisons were made between treatments and sampling dates. Tree growth measurements, nut yield and other nut quality measurements were taken at the end of each growing season. There were no differences in tree growth among alleyway treatments. The first season's nut yield was greater from trees with vegetation-free alleyways; otherwise nut production did not differ among the treatments. Arthropods were more numerous and diverse in alley cropped alfalfa than in alley cropped bromegrass or in the vegetation-free controls. Alley cropped bromegrass supported a more diverse population of arthropods than did the vegetation-free control. Arthropod diversity in the tree canopies did not differ among treatments. Alley cropped forages supported a more diverse and even arthropod fauna than did adjacent monocropped forages. We conclude that alley cropped forages had a relatively minor impact on the growth and nut yield of walnut trees.This revised version was published online in November 2005 with corrections to the Cover Date. 相似文献
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施肥和覆盖对澳洲坚果344和OC生长和产量的影响 总被引：2，自引：0，他引：2
为了解养分和地面覆盖对澳洲坚果生长和产量的影响,采用L9(34)正交设计,对8年生澳洲坚果品种344和OC开展施肥和覆盖试验。结果表明,试验实施1 a时,品种344的平均地径、树高、冠幅、冠高的增长率分别为13.0%、9.2%、4.1%、6.1%,品种OC的平均地径、树高、冠幅、冠高的增长率分别为6.3%、4.8%、1.3%、4.5%,品种间差异极显著(P≈0.0000.01)。各处理组合中,品种344的单株鲜果产量为0.5~1.4 kg/株,单位面积鲜果产量为191.6~470.1 kg/hm2;品种OC的单株鲜果产量为1.6~9.7 kg/株,单位面积鲜果产量为535.1~3 235.3 kg/hm2;各处理组合间,仅品种OC的单株产量呈现极显著的差异(P≈0.0000.01);同一品种的不同单株间,产量差异也较大。影响生长和产量的主导因子因品种不同而异,所以对于不同的澳洲坚果品种应研究相应的丰产栽培技术。 相似文献
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The importance of agroforestry hay and walnut production in the walnut-fruit forests of southern Kyrgyzstan 总被引：1，自引：0，他引：1
Maik Rehnus Davlet Mamadzhanov Bronislav Ivanovitch Venglovsky Jean-Pierre Sorg 《Agroforestry Systems》2013,87(1):1-12
Walnut-fruit forests (WFF) in Kyrgyzstan are biodiversity hotspots, provide important ecosystem services, and are of economic value yet currently suffer from a lack of sustainable management. We analysed current agroforestry practices through a series of interviews with farmers and reviewed the input–output data for 5 years of hay and walnut production for three case studies. The interviews showed that hay-making and walnut collection are the primary agroforestry practices in the WFF and have clear economic importance. Walnut in particular is a source of additional income for farmers and hay-making activities are strongly influenced by the need to winter cattle in these regions. The low reliability of interview data limited the planned analysis of profitability of case studies. Walnut production, however, is difficult to calculate because it is highly dependent on weather conditions and cropping practices between walnut trees (Juglans regia L.). This study highlights the need for improved agroforestry technologies in the WFF and identifies potential means for a sustainable, multi-purpose management of the WFF with a special focus on income generation. 相似文献
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David Brauer Adrian Ares William Reid Andrew Thomas John P. Slusher 《Agroforestry Systems》2006,67(1):63-72
Many landowners in the United States have little knowledge of the potential economic returns from agroforestry practices.
Economic simulators for temperate agroforestry practices have been generated; yet, there are few data sets on yields of timber
and other products to validate and refine such models. The objectives of this study were to characterize variations in nut
yields among open canopy eastern black walnut (Juglans nigra L.) trees and apply this information to the development of predictive equations between tree diameter at breast height (DBH)
and nut yields. Three data sets were analyzed that included results from Tennessee; Chetopa, Kansas; and Mt Vernon, Missouri.
Tree-to-tree variation in nut yields was high within each data set, with coefficients of variation for nut yields typically
exceeding 50%. Averaging nut yields over several consecutive years reduced coefficients of variation. Nearly half of the high
nut producing trees exhibited an alternate, biennial nut bearing pattern. Trees with low average nut yields had either sporadic
or irregular patterns of nut bearing. The regression coefficients for equations relating stem diameter and nut yields varied
considerably. Averaging nut yields over consecutive years, and averaging stem diameter and nut yields over a number of trees
increased regression coefficients of such equations. These results indicate that predicting nut yields of a tree stand over
a several year-period will be easier than predicting yields for a specific tree in a specific year.
Deceased 2002 相似文献
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Manuel R. Guariguata Peter Cronkleton Patricia Shanley Peter L. Taylor 《Forest Ecology and Management》2008
We discuss the extent of compatibility of timber and non-timber forest product (NTFP) extraction in two neotropical localities from biophysical, social, and institutional perspectives: the community concession forests of the Petén, Guatemala, and extractivist communities in northern Bolivia. In both localities, timber is harvested via reduced-impact logging (RIL) practices. In Guatemala, the main NTFP extracted is foliage from the understory xate palm (Chamaedorea spp.); in northern Bolivia, the fruits of the Brazil nut tree (Bertholletia excelsa). The Guatemalan case suggests a relatively high degree of compatibility due to low timber harvesting intensities, coupled with temporal, spatial, and social segregation of xate extraction in a well-defined land tenure system. In northern Bolivia, forest management regulations pay little attention to NTFPs and land tenure issues and related conflict complicate efforts to limit timber harvesting impacts on Brazil nut trees. The introduction of timber management plans overlain on customary property rights systems in which the extraction of Brazil nut is organized could undercut its management system. The two case studies suggest that specific legislative, education, and project interventions may help to promote the compatibility of timber and NTFP extraction and management. These include formal training of foresters on NTFP ecology and management while taking into account the perspectives of multiple stakeholders in the design of management plans. Tropical forest users, research managers, and policy makers will also better understand the need for integrated management of timber and NTFPs, if the trade-offs and potential economic benefits from NTFP extraction are clarified. 相似文献
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文章研究了土壤不同水分条件下200、400kg/(株.a),不同氮沉降0、45和135g/(株.a)对文冠果结实(包括果实产量、种子千粒重、种仁含油率、果实纵横径及其比值等)的影响。结果表明:文冠果结实具有明显的变化特征。氮沉降在一定程度上提高了果实产量和果实横径。氮沉降对种子千粒重、种仁含油率的影响与土壤水分条件有关。低水分条件下,前者随着氮沉降的增加而增加,后者变化不明显。高水分条件下,前者变化不明显,后者则升高。2种水分条件下,果实的纵径、纵横径比均随着氮沉降的增加而降低。 相似文献