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Bedru Babulo Bart Muys Fredu Nega Eric Tollens Jan Nyssen Jozef Deckers Erik Mathijs 《Forest Policy and Economics》2009,11(2):109-117
By explicitly incorporating forest environmental products (FEPs) in household income accounting, this paper examines the role and significance of FEPs in household income and in rural poverty and inequality. As most conventional household surveys do not incorporate income from environmental sources, substantial gaps exist in our understanding of the actual functioning of rural economies and the extent of rural poverty and inequality. Using data from 360 randomly sampled rural households from 12 villages in Tigray (northern Ethiopia), we measure forest environmental resource use with a monetary yardstick and compares the value of FEPs with other household economic activities. We found that products from environmental sources represent an important component in rural livelihoods. Our analyses indicate that in the study area income from forest environmental sources occupies the second largest share in average total household income next to crop income. Poverty and inequality analyses show that incorporating forest environmental incomes in household accounts significantly reduces measured rural poverty and income inequality. Therefore, we suggest that sustainable forest management schemes should be adopted to maintain and enhance the flow of economic benefits to the surrounding communities without damaging the natural resource system. 相似文献
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Damiana is a medicinal plant with many traditional uses and a reputation as an aphrodisiac. Essential oils produced by this plant are used in traditional medicine, and for the preparation of liquors and tea. The composition of essential oils from wild damiana, plants grown with micropropagated methods involving cell suspension, and explants in solid medium, is presented. Relevant differences are observed in oils coming from wild and micropropagated plants, where micropropagated plants being more uniform with respect to quality and quantity. The most abundant constituents of the oils were caryophyllene oxide, caryophyllene, delta-cadinene, elemene and 1,8-cineol. 相似文献
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江苏省国家重点保护野生植物资源初步研究 总被引:3,自引:1,他引:3
对列入《国家重点保护野生植物名录(第一批)》的分布于江苏省的13种国家重点保护野生植物及价值作了初步研究。这13种植物分属12科,13属,其中蕨类植物2种,裸子植物1种,被子植物10种;属国家一级重点保护的有2种,国家二级重点保护的有11种。在江苏的主要分布区为苏南,对其价值从科研、观赏、经济等方面进行了评价,并提出了几点保护建议。 相似文献
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以八大公山国家级自然保护区35种国家重点保护野生植物为研究对象,对植物的科属、保护级别(I级、II级)、生活型(乔木、灌木、草本)、自然条件下繁殖属性(有性繁殖、无性繁殖)以及种子传播方式(脊椎动物传播、蚂蚁传播、鸟类传播、风传播)进行分类。结果表明:八大公山国家级自然保护区的35种国家重点保护植物隶属于22科27属,有国家I级保护植物6种,国家II级保护植物29种,乔木为28种,占80%,灌木与草本较少;自然条件下,35种保护野生植物均为有性繁殖,其中金毛狗为有性孢子繁殖,其余为种子繁殖;种子(孢子)传播方式中脊椎动物传播为18种,鸟类传播为14种,风传播为3种,分别占总物种数目的 51.43%、40.00%和8.57%。可见,八大公山国家自然保护区脊椎动物和鸟类的减少导致植物繁殖扩散困难可能是国家重点保护野生植物数量进一步减少的重要原因之一。 相似文献
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对福建省的44种国家重点保护野生植物资源的分布情况及保护价值作初步研究,分析其濒危现状及破坏的原因,最后提出几点保护对策。 相似文献
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文章以琼北传统村落为研究对象,通过GIS技术与方法,首先从宏观视角分析琼北传统村落的分布与地形地貌、水系分布、产业水平等因素的相关性,再从微观层面探讨水体、地形和气候因素对琼北村落空间形态的影响。研究结果发现,琼北传统村落主要可分为4个聚集片区;琼北传统村落的宏观分布与水系、高程、坡度等因素关联紧密,与坡向关联稍弱,主要分布在河流周边,以及高程较低、坡度较缓的区域;琼北传统村落微观形态大体可分为散点型、线型、树型和整饬型4类,水体、地形和气候对其微观单元空间形态构成重要影响。 相似文献
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野生植物类型自然保护区保护成效评估 总被引:1,自引:0,他引:1
野生植物类型自然保护区是以野生植物物种种群及其自然生境为主要保护对象的自然保护区。保护成效评估是基于保护对象对自然保护区进行的,开展野生植物类型自然保护区保护成效评估,对保护野生植物资源、提高自然保护区保护效率、改善自然保护区管理水平等有重要意义。从野生植物保护分级体系、保护有效性评价与成效评估等方面对自然保护区保护成效进行了论述,并为野生植物类型自然保护区的更好发展事业提出了建议,以期为自然保护区保护成效的评估提供理论依据。 相似文献
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指出将“国家重点保护野生植物(第一批)”归纳为“246种8类,其中一级保护植物48种3类;二级保护植物198种5类”的错误。正确的归纳是“246种,另6属(所有种)、2科(所有种),其中一级48种,另3属(所有种);二级198种,另2科(所有种)、3属(所有种)”。 相似文献
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南京紫金山野生木本彩叶植物资源调查 总被引:1,自引:0,他引:1
通过野外调查统计,查明紫金山共有野生木本彩叶植物33科51属80种,并对木本彩叶植物进行了相关分类和观赏特性分析.认为乌饭树、水冬瓜等18种植物具有重要的开发利用价值. 相似文献
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Red deer can adjust to seasonal change of forage quality to maintain a relatively constant crude protein level (21.1±4.0,
14.7±1.0, 11.1±1.1 and 6.5±0.8 in spring, summer, fall and winter, respectively). Apparent protein digestibility is variable
from −99.9% to 97.5% depending upon season and forage type. True protein digestibility is 99%. Digestion of protein is significantly
influenced by phenolics in diets. Minimum digestible energy intake of 153.5 kcal/kg0.75/day is necessary to maintain a positive nitrogen balance. Red deer recycles 18–85% of the urea produced and urea kinetic
parameters (urea pool size urea entry rate and urea excretion rate) are correlated to plasma urea concentration. Rumen NH3-N production changes with season, but seasonal changes in other NH3-N kinetic parameters (NH3-N concentration, NH3-N pool size and NH3-N outflow rate) are in dispute. Protein metabolism may be promoted in response to cold stress. Endogenous urinary nitrogen
is 0.09 (red deer) and 0.16 g N/kg0.75·day (elk). and metabolic fecal nitrogen is 5.58 g N/kg dry-matter intake. Protein requirements ranges from 100 g/kg DM to
170 g/kg DM for red deer of various ages and physiological stages. In conclusion, the knowledge of protein nutrition of red
deer is limited. Much work is urgently needed in metabolism and requirements of protein before the appropriate feeding standard
of red deer is coming. 相似文献