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环境与发展是当今国际社会的重大课题,环境与发展的协调统一,核心是维护陆地生态平衡。文章通过对农林复合生态系统的分析,提出了农林复合生态工程建设是国家环境建设的重要组成部分,必须以生态经济理论为指导,以系统工程原理为依据,进行系统诊断,全面规划;加强控制指标体系等基础性研究;修改和补充有关技术政策。把农林复合生态工程建设,尽快纳入科学化、法制化的轨道。 相似文献
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环境与发展是当今国际社会的重大课题,环境与发展的协调统一,核心是维护陆地生态平衡。文章通过对农林复合生态系统的分析,提出了农林复合生态工程建设是国家环境建设的重要组成部分,必须以生态经济理论为指导,以系统工程原理为依据,进行系统诊断,全面规划;加强控制指标体系等基础性研究;修改和补充有关技术政策。把农林复合生态工程建设,尽快纳入科学化、法制化的轨道。 相似文献
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林业是农业的生态屏障,为了保障农业稳产、高产,要大力发展农田林网,改善生态,逐步向农林复合系统前进.农林复合生态系统形式多种多样,有树木与农作物轮流种植的模式;有在坡地上成行相间种植的模式;有在农作物中间栽植经济树木的混合种植模式;有在田边地角种植树木和防护林带等,我国三北防护林工程体系的重要内容之一就是农田林网. 相似文献
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农林复合模式研究与进展 总被引:8,自引:0,他引:8
文章对农林复合经营模式的发展历史、经营类型进行了概述,对其系统结构、生物物种设计原则、生态、经济、社会效益以及今后研究的重点进行了探讨,为农林复合经营模式在实践中的推广和理论研究的深入进行提供了理论依据。 相似文献
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黄河故道位于我县北部,是最严重沙化地区,属于生态脆弱区。解放前,气候环境恶劣,干旱季节,常出现大风天气,沙随风扬,弥漫天空,土地和生物资源破坏严重,生态环境恶化,影响农业生产,威胁交通和人民生活。当时群众采取栽植桑权、自蜡条挡风固沙,但收效甚微,成为我县有名的贫困区,解放后,党和政府对黄河故道的生态林业建设非常重视,先后在黄河故道建立了故道、东阁二个国营园艺场,开挖了黄河故道水库,疏竣了故黄河的中心河道及利民沟三大水利工程。上世纪80年代中期对故黄河故道资源情况进行调查并科学规划,结合黄淮海中低产田改造工程,进行大规模生态林业建设, 相似文献
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乌江流域山地农林复合经营模式研究 总被引:2,自引:0,他引:2
以乌江流域坡耕地为背景、调查总结了坡耕地水土流失的特点和农林复合经营复模式现状,分析论证了农林复合经营模式的生态经济的综合效益。提出了乌江流域林农复合经营的造林设计原则依据和布局与配置等系列实用技术,为长防工程建设这耕还林工种提供科学依据。 相似文献
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沙地“小老树”的开发与改造是当前林业生产中亟待解决的问题。为提高出材率 ,可采用挖根采伐的方式 ,在改造中要使规划具备整体性 ,渠路一体化。渠路边单行栽植杨树。不营造片林采用大行距、密株距带状造林形成林农间作的混农林业 ,从而可提高经济效益。 相似文献
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农用林业及其与社会林业的关系 总被引:1,自引:0,他引:1
本文论述了在用林业的概念及分类,以及农用林业与社会林业的关系,农用林业是一独立学科,没有社会林业的介入,农用林业照样生存。农用林业是社会林业的基础,社会林业又是农用林业及其用户—农民的中间桥梁。 相似文献
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Agroforestry practices of farming communities are investigated in southern Punjab province, Pakistan. It is hypothesized that rural people of this areas are more inclined than elsewhere in the province to practice agroforestry due to greater profitability than cropping. A landholder survey revealed that the majority of farmers are inclined to plant trees on their land. Low accessibility of institutional credit is a constraint for both agroforestry farmers (AF) and non-agroforestry farmers. However, among AF respondents only 24% were found to need credit for agroforestry practice, as against nearly 76% for crop production. Mostly farmers were found to have positive perceptions regarding agroforestry practice, because they understand the multiple benefits from growing trees, compared with cropping where farmers face various constraints, including poor access to credit, natural hazards, and little support from local authorities. Further, effort to sensitize farmers that growing trees has multiple benefits compared to only cultivation of field crops can bring about change in farmer’s perceptions and attitudes in the Indus River basin, resulting in motivation for agroforestry adoption. 相似文献
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Guillermo Martínez Pastur Emilie Andrieu Louis R. Iverson Pablo Luis Peri 《Agroforestry Systems》2012,85(3):315-318
Forest ecosystems are impacted by multiple uses under the influence of global drivers, and where landscape ecology tools may substantially facilitate the management and conservation of the agroforestry ecosystems. The use of landscape ecology tools was described in the eight papers of the present special issue, including changes in forested landscapes due to agricultural and forestry activities, landscape changes due to recent intensification of agriculture, and the impacts of agroforestry as compared to natural forest ecosystems. Landscape ecology can improve the economic, environmental and social values of agroforestry, and this knowledge should help to develop new management alternatives for agroforestry. We believe that these papers will inform management at the landscape level, especially in agroforestry landscapes, offering new tools for management and conservation. 相似文献
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本文对河南省南阳林业与区域经济可持续发展的关系进行了探讨。林业不仅是南阳区域经济可持续发展的保障、生物多样性保护的基础 ,而且可以成为区域经济发展的新增长点。本文对发展南阳林业、促进区域经济发展的潜力进行了分析。 相似文献
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河南省有丰富的林业土壤资源,在分布和利用上存在着明显的地域性差异。本着自然条件特征与开发利用的一致性,将全省林业土壤划为太行山区、伏北区、伏南区、大别桐柏区、黄淮海平原区、淮北南阳盆地区六大区域,分析了各区的土壤肥力状况,提出了保护、合理利用对策 相似文献
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Economic aspects of agroforestry 总被引:1,自引:0,他引:1
A. M. Filius 《Agroforestry Systems》1982,1(1):29-39
Agroforestry is analysed by means of economic concepts. The paper is mainly theoretical, since there are little adequate data to test the conceptual framework.Agroforestry needs not be limited to integration of agriculture and forestry on a plot, but may also include integration on a holding. Design and evaluation of agroforestry systems require thorough knowledge of relationships between agriculture and forestry. Complementary and supplementary relationships, mainly resulting from biological factors, were identified, which make agroforestry an efficient system of land use.Agroforestry can be an appropriate technology in areas with fragile ecosystems and subsistence farming. The objectives of participants in an agroforestry programme may not coincide with social objectives, and so do not lead to the socially optimum combination of agriculture and forestry. For that social optimum institutional arrangements will often be required.This paper is s shortened updated version of part of a lecture series on agroforestry, organized by the Departments of Forestry, Agricultural University, Wageningen [29].The author thanks his colleagues C.P. Veer and K.F. Wiersum for helpful comments. 相似文献