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Evaluation of existing on-farm agroforestry plots should provide useful supplementary information for the design of improved agroforestry systems, in both research and development projects. Such evaluation has been little used, however, largely due to the methodological difficulties of surveying highly variable on-farm plots, and difficulties in identifying key variables for measurement. This paper describes a set of methods and tools used in evaluating plots of alley-cropping and tree borders around crop fields established by farmers working with the CARE Agroforestry Extension Project in western Kenya. Details of survey design, sampling, and implementation are discussed, and suggestions made for carrying out agroforestry surveys in other projects. A condensed version of the questionnaire is appended. 相似文献
84.
林木种子裹衣质量指标的研究 总被引:3,自引:0,他引:3
杨家富 《林业机械与木工设备》2001,29(2):13-15
在试验的基础上,提出了林木种子裹衣的质量指标,分析其影响因素,为实施林木种子裹衣技术奠定基础。 相似文献
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大熊猫主食竹种的研究与进展 总被引:7,自引:0,他引:7
回顾了大熊猫主食竹种的研究历史,并着重从主食竹种的分类与分布、生理生化特征、生态生物学特性、营林技术、大熊猫对主食竹种的食用、主食竹种病虫害以及高新技术在竹类研究中的应用等7个方面综述了自20世纪70年代以来的研究成果,最后提出了今后的发展趋势。 相似文献
87.
A mail-out survey questionnaire was developed by the Agroforestry group at the University of Guelph to determine the level of awareness and interest in the adoption of agroforestry systems by landusers from four townships in Wellington County, Ontario. The questionnaire investigated: (1) the current level of knowledge regarding windbreaks, woodlots and plantations, intereropping, riparian plantations and silvipasture, (2) the present level of participation in each of these systems on-farm, (3) the perceived benefits and/or drawbacks of each of these initiatives with respect to total farm income, income diversity, land rehabilitation, land value/equity, soil/water conservation, labour intensity, overhead and return on the term of investment.The majority of respondents were familiar with conventional agroforestry systems such as windbreaks and woodlots/plantations (80%, 62% respectively), therefore the level of interest in the adoption of these practices was significant (74%, 66% respectively). Response rates were lower for silvipasture, riparian plantations and intercropping, most likely as result of the low level of familiarity with these practices (20%, 32%, 4% respectively). Respondents commented that agroforestry systems would have a neutral effect on farm income, and would increase land stewardship. In some cases, interested landusers indicated a willingness to participate in agroforestry systems even though they anticipated increases in overhead and labour intensity; however, this was only true if they held land stewardship as a priority. Landusers were more concerned with the economic aspects of agroforestry, as a determinant to the future adoptability of particular practices. Age, gender, farm operation and farm size were not correlated with the adoption of agroforestry systems.The success of agroforestry programs on farms in the study area is largely dependent on the attitudes and willingness of landusers to participate in non-traditional agricultural systems. 相似文献
88.
H. A. Pearson 《Agroforestry Systems》1995,29(3):181-189
The USDA Agricultural Research Service, headquartered at the South Central Family Farm Research Center, Booneville, Arkansas, recently initiated an agroforestry research program for the interior highlands and the southeastern United States. The purpose of the agroforestry program is to develop a research and technology transfer program in agroforestry that will provide additional alternative income opportunities for family farms of this region. The objectives of the program are: 1) to develop new information on the establishment, maintenance, and utilization of conifer and hardwood tree stands in open pastures, 2) to develop new knowledge in multiple-use management and their environmental impacts, and 3) to facilitate multidisciplinary networks and partnerships of farmers, technical specialists, scientists, and managers for accomplishing agroforestry research and technology transfer. 相似文献
89.
在全面调查普洱市七叶莲野生资源地理分布基础上,采用主成分分析法研究七叶莲野生资源地理分布与气候、地形之间的关系,并对海拔与七叶莲枝叶总皂甙含量做相关性分析。调查结果表明:七叶莲野生资源在普洱全市均有分布,在喀斯特地貌区域分布尤为集中,其水平分布范围为99°20′11″E~101°55′04″E,22°18′20″N~24°17′58″N,垂直分布范围为海拔500~1900 m。经主成分分析表明,影响七叶莲地理分布的主要水热指标的排序为湿度因子>热量因子>降水因子;相关分析结果表明,七叶莲所分布的海拔与其林木枝叶总皂甙的含量具负相关关系,其相关系数为-0.948,最高海拔(1460 m)与最低海拔(1006 m)的七叶莲枝叶总皂甙含量比为1.0∶1.5。 相似文献
90.