共查询到20条相似文献，搜索用时 125 毫秒
1.
复合农林业技术创新的探讨 总被引：6，自引：0，他引：6
确定了复合农林业的新概念及产业性、本质性、尺度性、最优性等特性,概述了复合农林业技术创新研究及应用的现状和新一轮复合农林业技术创新研究的基本情况。在此基础上,分析了复合农林业研究在主攻方向、技术路线、研究内容、技术关键、新理论及方法体系等技术创新的六大内容,提出了复合农林业技术创新的量化、优化、物化、简化、产业化五大评价标准及当前需要研究的五大课题,为加强技术创新、发展高科技、实现复合农林业的产业化提供了理论依据和可行性的操作方案。 相似文献
2.
3.
通过概述复合农林业基本内涵、中国林业可持续发展战略及六大林业工程建设与复合农林业的关系.说明复合农林业发展机遇.并结合复合农林业及其相关学科的发展趋势,从研究尺度、研究手段、研究方式、研究地域和热点研究内容等方面,提出我国未来复合农林业研究展望. 相似文献
4.
5.
混农林业及其研究概况 总被引：1，自引：0，他引：1
通过对混农林业概念的解释,阐述了混农林业的特征和作用,介绍了混农林业在国际国内研究现状及其类型。并浅述了混农林业生态效益、社会效益和经济效益的关系,综合了复合生态系统的社会、生态、经济效益的预测方法。 相似文献
6.
7.
介绍了复合农林业的历史背景和基本内涵.从人口基数、自然环境、农村经济等方面分析了中国可持续农业的基本特点.提出了复合农林业是实现中国农业可持续发展的重要措施. 相似文献
8.
9.
10.
11.
辽西地区几种农林复合型水土保持林模式的研究 总被引：3，自引：0，他引：3
辽西地区属半干旱丘陵区 ,由于地势起伏 ,雨量集中 ,土壤粘重 ,植被稀疏 ,森林覆盖率低 ,成为我省水土流失比较严重地区。水土流失的结果是导致表土破坏 ,底土裸露 ,土壤理化性质明显恶化 ,土地生产力下降 ,增加了植被恢复的难度。为迅速改变辽西地区贫瘠落后的面貌 ,恢复生态系统平衡。建国以来 ,这一地区开展了大面积人工造林工作 ,据统计资料表明 ,以油松纯林为主的水保林面积达 5 3万ｈｍ2 ,这些林分对改善区域生态环境 ,推动国民经济及社会各项事业的发展起到了重要作用。但以大面积纯林为主的油松水土保持林存在树种单一、层次简单、… 相似文献
12.
四川盆地丘陵区坡地农林复合系统内部结构和系统综合效能的研究 总被引：4，自引：0，他引：4
针对四川盆地丘陵区农林生产特点和坡地农林复合系统特征,对其内部结构进行综合研究。分析了林带对农作物的正,负效应,依据林带间散射辐射分布规律、农地水土流失特征和农作物产量分布格局等方面与林带间距离的相互关系,提出了坡地林带间距离应不小于３倍林带平均高,才能保证农作物不至于减产;同时,对建成的坡地农林复合系统模式进行综合效能分析,表明,与农地系统对比,坡地农林复合系统提高了土地生产力、能量转化率、营养 相似文献
13.
四川盆地丘陵区坡地农林复合系统林带类型、农作物复种方式的选择 总被引：2，自引：0，他引：2
针对四川盆地丘陵区农、林业生产特点和坡地农林复合系统特征，运用层次分析法（ＡＨＰ），从结构、功能，效益方面设置评价指标，分别对系统中的６种林带类型和１０种农作物复种方式进行综合评价，结果提出了３种较好的林带类型（即桤、柏混交和栎，柏混交－灌－草结构的林分以及桤木－草结构的林分）和４种较好的农作物复种方式（即小麦－花生、小麦／西瓜／蔬菜，蚕豆／玉米／红薯和蚕豆／西瓜／红薯等）；为该区坡地农林复合系统 相似文献
14.
Stewart A.W. Diemont Jessica L. BohnDonald D. Rayome Sarah J. KelsenKaity Cheng 《Forest Ecology and Management》2011,261(10):1696-1705
Numerous communities associated with at least five distinct ethnic Mayan groups in southern Mexico and Central America continue to rely upon forested areas as integral components of their agricultural systems. They carefully manage these areas so that forests provide food, raw materials, and animals. Management practices include removing and planting of woody and herbaceous species, apiculture, and seed harvest. Mayan agroforestry systems in geographically and ecologically distinct areas of Mesoamerica were evaluated to better understand traditional agroforestry system components and how indigenous Mayan agroforestry could be a part of regional forest conservation and restoration. Systems were within Mexican land grant areas (ejidos) or on contested land. Although these systems rely upon different woody species and management techniques, common among them are: (1) the use of multi-stage and successional pathways with forest as a part of the larger system, (2) species that are believed by traditional ecological knowledge (TEK) to accelerate forest regeneration - more than 30 tree species are recognized and managed as potential facilitators of forest regeneration and (3) direct human consumption of forest products at all stages of regeneration. 相似文献
15.
Seasonal variation of soil respiration rates in a secondary forest and agroforestry systems 总被引：2，自引：0，他引：2
Kikang Bae Don Koo Lee Timothy J. Fahey Soo Young Woo Amos K. Quaye Yong-Kwon Lee 《Agroforestry Systems》2013,87(1):131-139
Agroforestry systems are widely practiced in tropical forests to recover degraded and deforested areas and also to balance the global carbon budget. However, our understanding of difference in soil respiration rates between agroforestry and natural forest systems is very limited. This study compared the seasonal variations in soil respiration rates in relation to fine root biomass, microbial biomass, and soil organic carbon between a secondary forest and two agroforestry systems dominated by Gmelina arborea and Dipterocarps in the Philippines during the dry and the wet seasons. The secondary forest had significantly higher (p < 0.05) soil respiration rate, fine root biomass and soil organic matter than the agroforestry systems in the dry season. However, in the wet season, soil respiration and soil organic matter in the G. arborea dominated agroforestry system were as high as in the secondary forest. Whereas soil respiration was generally higher in the wet than in the dry season, there were no differences in fine root biomass, microbial biomass and soil organic matter between the two seasons. Soil respiration rate correlated positively and significantly with fine root biomass, microbial biomass, and soil organic C in all three sites. The results of this study indicate, to some degree, that different land use management practices have different effects on fine root biomass, microbial biomass and soil organic C which may affect soil respiration as well. Therefore, when introducing agroforestry system, a proper choice of species and management techniques which are similar to natural forest is recommended. 相似文献
16.
17.
经济林农作经营系统及其研究 总被引：1，自引：1，他引：0
本文从经济林生产的经济和生态两大功能出发,对经济林农作经营系统进行了综合性研究。提出了经济林农作经营系统的主要模式结构及主要特点,分析了经济林农作经营系统的建立原则和建立过程,还探讨了系统的生态经济效益及评估。 相似文献
18.
发展林化科技 繁荣山区经济 总被引：1，自引：0，他引：1
林产化学工业是以森林资源为原料经化学加工向市场提供商品产业。四十年来在林化科技发展的推动下,我国已建成大小林化企业近千家,年产值达20亿元,在山区经济发展中起了重要作用。今后要依靠林化科技,优化资源,提高加工技术水平和开发新产品,使林化工业在山区经济发展中发挥更大的作用。 相似文献
19.