土地节约与集约利用评价研究——以湖南省为例   总被引：1，自引：0，他引：1  

沈彦  刘明亮  雷志刚 《云南地理环境研究》2007,19(4):33-38

土地节约与集约利用是发展循环经济和建设节约型社会的必然要求。首先明确提出土地节约和集约利用评价方法与指标选取原则，完善节约和集约用地的评价指标结构层，特别是农用地和农村宅基地等土地利用类型的评价指标，建立区域和土地利用分区的节约与集约利用土地评价指标体系，以湖南省为例，运用层次分析法，得出湖南省土地节约与集约利用水平的动态变化发展趋势以及农用地集约利用的效益，最后利用加权求和的综合方法，计算出湖南省农用地集约利用水平的综合评价值。  相似文献   

The role and value of local knowledge in Jamaican agriculture: adaptation and change in small-scale farming     

CLINTON BECKFORD  DAVID BARKER† 《The Geographical journal》2007,173(2):118-128

Local knowledge has played an active role in the lives of rural communities in virtually every part of the world. In Jamaica, traditional cropping systems based on local informal knowledge have been practiced since the days of slavery and play a vital role in meeting food security. Yet, some negative attitudes remain about the legitimacy and relevance of small-scale farmers' local and traditional knowledge. This paper discusses some conceptual and empirical issues related to the application of local knowledge among small-scale food farmers in central Jamaica. The paper argues that contextually speaking, local and traditional knowledge is valuable, adaptable and necessary in coping with risk and uncertainty in a changing world, while cautioning against a misguided notion of traditional knowledge as a panacea to all the ills of local agriculture.  相似文献   

东北农牧交错区水分条件的空间分异及其对土地利用的影响   总被引：2，自引：2，他引：2  

张军涛  艾华等 《地理科学进展》2001,20(3):234-239

大气降水、土壤水分和干燥度指数是在经度方向上控制区域景观格局的主要因素。本文运用最新的调查统计资料，对东北农牧交错区降水、土壤潜在蒸散量、干燥度指数及农作物生长期间土壤水分盈亏量的时间分布进行了分析；提出了研究区内作物生长季期间土壤潜在蒸散量的空间分布规律和干燥度指数的时空变化情形。结合水分条件的空间分布，提出了5种土地利用区域组合类型。  相似文献   

广州信息密集服务业的空间发展及其对城市地域结构的影响   总被引：27，自引：0，他引：27  

阎小培 《地理科学》1999,19(5):405-410

采用第三产业普查资料,深入分析了改革开放以来广州信息密集服务业的发展水平,空间发展特征和原因及其对城市地域结构的影响,揭示了信息密集服务业发展与城市地域运动的关系。  相似文献   

浅淡物候指标在农业生产上的应用     

栗锡龄  王月梅  王有根  李金莲 《山西气象》2006,(4):23-25

通过对物候资料与气象资料的对比分析找出与农业界限温度对应的物候指标,以物候指标为依据,就可掌握农业四季的初终期和农业界限温度的出现时间,并以物候指标预告农时,简便易行,对指导农业生产有广泛的应用价值。  相似文献   

南方集约农区农牧结合对农业可持续发展的作用   总被引：8，自引：0，他引：8  

张卫建  谭淑豪  冯金侠  章熙谷 《地域研究与开发》1998,17(2):24-27

为寻求该区农业可持续发展的途径,作者在分析其农业可持续发展的主要制约因素基础上,对农牧结合在实现农业可持续发展中的功能作了全面论述。结果表明,农牧结合是实现该区农业可持续发展的一条有效途径。最后还提出了该农区农牧结合的可行途径及有效措施  相似文献   

Sustainability evaluation of different systems for sea cucumber (Apostichopus japonicus) farming based on emergy theory     

Wang  Guodong  Dong  Shuanglin  Tian  Xiangli  Gao  Qinfeng  Wang  Fang 《中国海洋大学学报(英文版)》2015,14(3):503-510

Emergy analysis is effective for analyzing ecological economic systems. However, the accuracy of the approach is af-fected by the diversity of economic level, meteorological and hydrological parameters...  相似文献   

临沂市开发区土地集约利用评价工作分析     

徐巍巍  王磊 《山东地质》2010,(9):57-59

土地集约利用评价成果对增强政府调控土地利用的能力,构建资源节约型社会,促进经济社会可持续发展都具有重要的意义。该文在分析及评价临沂市开发区土地利用现状、结构的基础上,提出了合理化建议,对促进临沂市土地可持续利用具有重要意义。  相似文献   

Layered farming for Marsupenaeus japonicus Bate     

李玉全  姜令绪  王仁杰 《中国海洋湖沼学报》2014,32(3):549-553

Marsupenaeusjaponicus Bate is one of the most valuable cultured shrimp species in China and outdoor earthen pond farming is the most common method of culturing this organism. The need to increase soil usage efficiency in aquaculture has been recognized and a great deal of research effort has been directed toward development of super-intensive farming systems. However, current research and development in this field is largely devoted to Litopenaeus vannamei Boone, while to M.japonicus Bate it has been neglected. In this study, a layered fanning system was designed and a 66-day study was conducted in M.japonicus Bate culture. The system comprised bracket and sand layers that divided a shrimp tank filled to a depth of 1.2 m into four water layers. Conventional tank culture （unlayered） was used as a control. The results show that survival rate, feed conversion efficiency and production of M.japonicus Bate in the layered farming system were 68%, 18%, and 0.59 kg/m^2, respectively, all of which are significantly higher than in the unlayered fanning system （P〈0.01）. These findings confirmed the possibility of using a layered system to culture M. japonicus Bate.  相似文献   

Effects of corridor networks on plant species composition and diversity in an intensive agriculture landscape     

Qian Tang  Guofu Liang  Xunling Lu  Shengyan Ding 《中国地理科学(英文版)》2014,24(1):93-103

The development of modern agriculture has resulted in much homogenization of the landscape consisting of large patches of farmland,so small remnant non-crop habitats especially linear corridors play an important role in the conservation of species and the maintenance of ecosystem functions.However,little attention has been paid to the effects of corridors structural characteristics on the plant species restricted to such habitats.In this study,we selected three types of corridors including ditch,hedgerow and road,and ana-lyzed their structural characteristics.The plant species presented in these corridors were investigated,and the species diversity,abun-dance and frequency were estimated.Moreover,spatial arrangements of corridors were classified into different types to discuss whether there were significant effects of corridor network on plant distribution.The results show that three types of corridors have different ef-fects on plant species composition and diversity.The one-one combined corridor networks and total network associated by three corri-dors have more complex structural features than each single type of corridor.However,there is no strong correlation between the corri-dor networks with their plant species.We suggest that carrying out a pointed vegetation survey at corridor intersections to further test the relationships between structural features of corridor and plants is necessary.  相似文献