LAND EVALUATION AND RATIONAL STRUCTURE OF LAND-USE IN DESERT STEPPE AREA IN NINGXIA HUI AUTONOMOUS REGION

<正> Located in the middle and north part of Ningxia Hui Autonomous Region, the desertsteppe area includes the whole of Shizuishan, Huinong, Pingluo, Taole, Helan, Yingchuan,Yongning, Lingwu, Qingtongxia, Wuzhong, Zhongning, and Zhongwei counties and thenorth part of Yanchi, Tongxin counties. This region has an area of 32020 km~2. The popula-     

宁夏土地生态环境的主要问题及对策

<正> 1.主要问题土地是由自然地理所有要素(地质、地貌、气候、土壤、植被等)组成的自然综合体,具有综合反映环境质量的特性。由于土地各组成要素在地域空间上的量值及其组合作用的差异,因而环境质量及环境治理方向也会因地域而不同。就宁夏自治区而言,大致可以划分出四大类型区:1.1 宁南黄土丘陵区以水蚀为主,水土流失严重,土地生态环境脆弱     

农牧交错地带土地生产力退化的初步探讨

本文根据我国北方地区农牧交错带自然条件的特点,指出其生态环境的脆弱性,并回顾历史及现实状况,揭示了北方农牧交错带土壤风蚀、土地退化、沙化的严重性,并指出了这一地区土地整治的途径。     

LAND UTILIZATION COUNTERMEASURES AND CURRENT SITUATION OF HETAO IRRIGATION REGION IN INNER MONGOLIA

<正> Hetao irrigation region is situated in the western part of Inner Mongolia. It stands bythe Yin·Shan mountain in the north, leans against the Yellow River in the south, nears theeastern side of Ulanbuhe Desert in the west and borders on Baotou in the east. It is 280kilometers in length from east to west. and 45-90 kilometers in width from north to south.     

乌兰布和农场土地资源开发及生态建设规划的理论与实践

<正> 乌兰布和农场位于乌兰布和沙漠东北部,东、南与磴口县农区相毗连,面积200km~2。其区位特点是处在沙漠与河套灌区之结合部,实属防沙前沿。这里下伏地形为古黄河冲积平原。据考证,乌兰布和沙漠北部曾为汉代垦区,后因战乱而放弃。弃耕后在强烈的风力作用下,在近一千多年来,逐渐演变成沙丘起伏的沙漠化土地。现今土地类型     

宁夏大柳树灌区土地资源及其开发潜力初步研究

本文论述了宁夏大柳树水利枢纽工程灌区的土地资源质量、数量及其自流灌溉和扬水灌溉的开发能力。     

SOIL EROSION AND THE WATER & SOIL CONSERVATION IN THE LOESSIAL HILLY AREA OF SOUTHERN NINGXIA

<正> 1. General Situation of Soil Erosion The loessial hilly area of southern Ningxia, Situated at the south of Ningxia Hui Au-tonomous Region, middle-upper reaches of the Yellow River, part of Chinese Loess Pla-teau, covers an area of 1500 square kilometers with an annual mean temperature of 5-8℃,a precipitation of 300-500mm of which 70% taking place concentratively during the peri-od between June and September in form of rainstorm, The annual evaporation is     

宁南山区土地利用和开发战略探讨

宁南山区地表结构复杂,是典型的温带大陆性半干旱偏旱季风气候。在调查分析土地利用现状特点和存在问题的基础上,提出统一规划,合理布局;增加肥料投入,改良培肥土壤;推广和使用旱作农业丰产技术,发展集流农业和节水灌溉技术;开发区域名优特产,建立绿色食品生产基地;以饲草生产为突破口,加速发展畜牧业经济的区域土地开发战略措施。     

陕西省乾县枣子沟流域土地资源评价及开发利用

本文在提出土地评价分级系统的基础上，进行了枣子沟流域各级土地资源质量的评价。共划分了八级土地，分别概述了土地特征和生产力。对耕地、园地、林地、草地的利用现状进行了分析评述，指出了存在的问题是后备资源不足、利用方式单一、用地布局不尽合理、管理粗放、生产力不高等。阐述了合理利用土地资源的配置原则和用地结构调整的实施方案。     

宁夏土地沙质荒漠化及其防治对策

分析了宁夏土地沙质荒漠化的现状、形势、防治成就及存在的问题，指出：因自然和人为双重因素而导致的宁夏土地沙质荒漠化是影响其经济、社会持续稳定发展的突出环境问题。对此，提出了进一步搞好土地沙质荒漠化防治的具体对策。     

THE RATIONAL UTILIZATION OF WATER RESOURCES IN IRRIGATED AREA OF THE YELLOW RIVER IN NINGXIA

<正> The paper describes the water resources in the irrigated area of Ningxia, China, andthe methods for improving the utilization of the water resources, and puts forward somesuggestions so as to utilize the water resources rationally. The history of irrigation farming in Ningxia can be traced back to more than two thou-     

AN APPROACH TO THE ECOAGRICULTURAL CONSTRUCTION IN BAICHA VILLAGE OF PENGYANG COUNTY,NINGXIA

<正> Agricultural production activities are organic combinations between the courses of nat-ural reproduction and economic one. Natural reproduction course is the material base forthe agro-ecological and economic system uniformly operating. So the development ofagro-production has closely concerned with the ecological circumstances. The serious wat-     

宁夏旱地农业类型分区及评价研究

旱地农业是指干旱、半干旱区的雨养农业。类型分区是因地制宜布局农业生产,找出农业技术措施推广的合理区间和开发旱耕地生产潜力之重要条件。该文在指出宁夏干旱特点的基础上,提出旱地农业类型分类的原则与指标和分区方法,最后将宁夏划分为荒漠草原风沙干旱牧业区、半农半牧区、半干旱典型草原旱作农业区和半湿润森林草原农林区。同时也给每一区的资源条件以综合评价。     

地产蛭石在干旱地区直接施用的研究

本试验利用地产混合蛭石直接施入土壤,观察蛭石的不同用量对土壤主要物理性状,土壤持水力、土壤水分常数,根区速效养分,作物生理功能及产量等综合影响的结果表明:每放施用地产混合蛭石240kg,120kg与对照比较,不仅分别增产15.5%、13.43%,而且还可改善种子品质。     

中国干旱区山地的资源、环境和生态意义

<正> 中国干旱区占有贺兰山以西、昆仑—阿尔金—祁连山以北的广大土地,其边缘和内部分布着众多山地。这些山地与干旱的平原、盆地相间排列,使主要盆地均被高山环绕,或至少一侧有山地依傍,形成了中国干旱区一个重要的地理分布特征。例如,阿尔泰山、准噶尔西部山地和天山环绕准噶尔盆地;天山、帕米尔和昆仑山环绕塔里木盆地;阿尔金     

ISSUES CONCERNING THE MANAGEMENT AND THE DEVELOPMENT OF ARID AND SEMIARID LAND IN CHINA

<正> The arid and semiarid land in China covers a vast area, about 3.5 million km~2(not coun-ting the Tibet Plateau),where natural resources are very aboundant. In this area, the totalsolar radiation is as high as 140--160 kilocalorie / cm~2. a. There are about 167 million ha ofvarious grasslands, accounting for nearly 60% of the national grassland area. Arable     

THE ENVIRONMENTAL QUALITY AND RENOVATING PLAN OF THE LOESS PLATEAU AND LIUPANSHAN MOUNTAINOUS AREA IN NINGXIA

<正> 1. The environmental quality of the Loess Plateau and Liupanshan mountainous area in Ningxia The landuse structure in the studied region was very irrational in 1970s, the propor-tions covered by farming, forestry and animal husbandry are separately 50.91%, 6.32% and33.3%. Since 1980s, the farmland has been returned back to forestry and pasture so that the     

AN APPROACH TO THE FORESTRY PROBLEMS AND TACTS IN THE NEW IRRIGATION AREA OF YANGHUANG IN NINGXIA

<正> This article exponded the importance of forestry construction in Ningxia, Yang HuangNew Irrigation Area economy development. It analysed the problems that may exist in theforestry constructions of New Irrigation Area, (such as the monostructure of trees,struction simplicity, monoculture of stand and lack of functions) And put forward the cont-er actions and construtioes advices.     

内蒙古乌拉盖地区景观破碎化与土地利用对策的研究

本文利用ＲＳ,地面调查和ＧＩＳ相结合的手段,对位于内蒙古锡林郭勒盟东北部的乌拉盖草甸草原区景观破碎度分３个时期（１９８８－１９９２,１９９３－１９９５,１９９６－１９９７年）进行动态研究,并选用３种不同的指标：斑块密度指数、廊道密度指数、景观班块破碎化指数,对该区的景观破碎度进行了测算分析,进而探讨了该区土地利用存在的问题和对策。结果表明：１．总体班块密度指数在三个时期分别为０．０１２５个．ｋｍ－２、０．０５８２个．ｋｍ－２、０．１１２．ｋｍ－２;２．廊道密度指数在三个时期都约为０．０５３８ｋｍ．ｋｍ－２;３．整体景观斑块数破碎化指数在三个时期分别为０．００２５、０．０１１６、０．０２２３。说明,随着人类干扰的增加,景观的破碎化程度加大,土地利用不合理的有关问题不容忽视。     

ANALYSES OF THE DIFFERENCE BETWEEN IRRIGATED AND NONIRRIGATED AREA FOR LUMINOUS ENERGY UTILIZATION RATIO AND PRODUCTIVE POTENTIALITIES IN NINGXIA

<正> Situated in arid and semi-arid lands, the Ningxia Hui Autonomous Region is locatedat the middle reaches of the Yellow River. An adequate system of gravity irrigation was es-tablished in the north of Ningxia. Adding to abundant sunshine, strong solar radiation andmoderate heat, the agriculture is very developed. The south mountainous area of Ningxia, including both Yanchi and Tongxin counties,is short of rain, The vast lands cannot be irrigated. Nonirrigated agriculture and serious