小城镇土地定级及其成果应用探讨

随着乡镇企业和地方经济的发展，小城镇各种土地交易案例已大量出现，客观上提出了小城镇土地定级的必要性。但小城镇土地定级具有不同于大中城市的特点，文中从实际出发探讨了小城镇土地定级的的理论和方法，并以莒南县城区为例讨论了小城镇土地级别规律，分析了土地定级结果在促进小城镇土地合理利用中的应用。     

西部大开发政策下我国环保法律政策研究——以PRC/GEF-OP12项目为例

中国西部大开发政策显示了政府促进西部地区可持续发展的决心。中国政府已经认识到西部大开发成功的关键是如何保护本地区脆弱的生态环境,扭转自然资源退化的趋势。作为西部大开发的一部分,政府决心解决支持发展的必要环境条件。其中,土地退化是最重要的环境问题。本文仅从分析目前我国环保法律制度对于土地退化防治的规定不足之处,来探讨我国环保法律制度应如何完善,更好的为土地退化防治乃至整个西部地区的生态建设服务。     

Towards a World Soil Survey Archive and Catalogue

An extensive collection of soil, land resource and land suitability surveys undertaken worldwide over the last 80 years by soil surveyors and scientists at the behest of the British government and others has been archived and catalogued using internationally recognized bibliographic standards. The World Soil Survey Archive and Catalogue (WOSSAC) consisting of over 13 000 reports and maps is now available for consultation and use by the international soil science community.     

山地果园3种省力化耕作生态复合经营模式与评价

省力化耕作是现代化农业的一项重要制度，考虑农村劳动力不断减少的实际和林业作为生态建设主体的需要，经过试验和调查研究提出了可在山地果园推行的生草栽培、林地套种和覆盖3种生态化、省力化耕作模式，并从经济、生态和社会效益3个方面对其进行了评价。     

Predicting the distributions of plant species at the regional scale: a hierarchical matrix model

This paper describes a model which links four levels in an ecological hierarchy using a series of matrices. The four levels are landscape, land cover type, community and species. Each matrix quantifies the probabilistic associations between entities in two adjacent levels in the hierarchy. A landscape classification (1 km resolution) provides a spatial element to the model enabling the distributions of species to be predicted and presented as maps within a geographical information system (GIS). Implementation of the model in Northern England is described. The distributions of 579 species of plants were predicted and compared with data from independent field surveys. The predicted distributions were found to be accurate for 59 % of species. The distributions of rare and non-native (introduced) species of plant were relatively poorly predicted. The potential of this approach to model plant species distributions is discussed.     

甘肃省坡耕地利用状况与退耕还林还草技术对策研究

对甘肃省坡耕地的利用状况及其退耕的可行性进行了较为全面的分析,按照因地制宜的原则,将退耕区域划分为陇中黄土丘陵沟壑区、陇东黄土台塬区、山高坡陡的陇南山区与河西防风固沙区四大区,并就各区退耕后的还林还草方式进行了具体的论证,提出了15°～25°和25°以上坡耕地退耕还林还草的具体技术对策。     

Interpretation and Compilation of Landsat TM Imagery for Land-use and Site Classification Mapping in the Korqin Sandy Lands, NE China

For the purpose of of forestation, planning and development in the Three-North Region, a series of 6 Landsat TM scenesfrom 1996 to 1997 were used to classify land-use conditions in the whole Korqin Sandy Lands at eastern part of Inner Mongolia, China, with an area of about 430×306 square kilometers. Later on, Site classiflcation was made and mapped for the 4 southern sandy counties. The annotation symbol for each agglomeration of site condition is comprised of six parts: land unit, land use pattern, soil texture, under ground water table, top-soil existence, wind erosion or salinisation condition. Field expedition and soil file augering help information extraction from the satellite imagery. The products include a land-use classiflcation map at scale 1/200,000 of the whole Korqin Sandy Lands, and a collection of site classiflcation maps at scale of 1/50,000, consisting of 135 pieces (42.8 cm×30.8 cm each). Electronic version of the maps is in raster form.     

鲁梅克斯K-1杂交酸模在盐渍化土地适应性栽培效果分析

对临泽盐渍化土地栽培的鲁梅克斯K－1杂交酸模，进行了植物学特征、耐盐碱、抗寒性、营养价值，根系及土壤含盐量等性状的分析，发现鲁梅克斯K－1杂交酸模在含盐量1．15％土壤环境生长良好，其根组织能耐盐碱，且0－5cm土层含盐量可下降37．05％－50．58％，年可收获优质干草12．4t/hm^2，开发利用潜力巨大。     

城市土地资本营运的方法研究

在计划经济条件下，主要是用行政手段管理土地资产，在市场经济条件下则要把土地资产作为资本来经营，即土地资本营运。城市土地资本营运的好坏，直接关系城市建设和城市经济的发展。对城市土地资本营运条件、方法进行了研究，提出了搞好城市资本营运的具体对策。     

对山西省寿阳县机械化旱作农业的调查与思考

山西省寿阳县十余年来开展国内国际科技合作，试验示范机械化旱作农业技术、机械化保护性耕作技术和集雨利用工程技术，以科技进步促进了旱作农业持续发展，成绩显著。影响深远。建议进一步试验应用机械化行走式补灌种苗增墒技术，促进旱农作物尤其是当地优势资源小杂粮的增产增收。