Characteristics of mineral elements in shoots of three annual halophytes in a saline desert,Northern Xinjiang

Halophytes are valuable salt-, alkali-and drought-resistant germplasm resources. However, the characteristics of mineral elements in halophytes have not been investigated as intensively as those in crops. This study attempted to investigate the characteristics of mineral elements for annual halophytes during their growth period to reveal their possible physiological mechanisms of salt resistance. By using three native annual halophytes (Salsola subcrassa, Suaeda acuminate and Petrosimonia sibirica) distributed in the desert in Northern Xinjiang of China, the dynamic changes in the mineral element contents of annual halophytes were analyzed through field sampling and laboratory analyses. The results demonstrated that the annual halophytes were able to absorb water and mineral nutrients selectively. In the interaction between the annual halophytes and saline soil, the adaptability of the annual halophytes was manifested as the accumulation of S, Na and Cl during the growth period and maintenance of water and salt balance in the plant, thus ensuring their selective absorption of N, P, K, Ca, Mg and other mineral nutrients according to their growth demand. By utilizing this property, halophyte planting and mowing (before the wilting and death periods) could bioremediate heavy saline-alkali soil.     

河北驼梁风景区蜘蛛名录

通过1999年—2007年对河北驼梁风景区蜘蛛种类的调查,共鉴定蜘蛛181种,隶属于28科93属,为该地区的蜘蛛天敌资源的开发利用提供了依据。     

Pedogenesis,land management and soil classification in hyper‐arid environments: results and implications from a case study in the United Arab Emirates

A study of the soils in the Northern Emirates (NE), which covers 8.2% of the United Arab Emirates (UAE) was undertaken applying the USDA Soil Taxonomy (ST) to classify soils up to the family level. The objective of the study was to identify the key factors and processes responsible for soil formation in hyper‐arid environments in general and the study area in particular and to draw conclusions regarding soil classification and land management. Fifteen pedons representing the major soils in the region were investigated. Samples were collected, processed and analysed for physical, chemical and mineralogical characteristics. Factors controlling soil development such as parent material, climate, plants and animals, relief, time, human activities and processes of salinization, calcification, gypsification, sodification and aeolian deposition were evaluated to guide soil classification and management. Data from soil families were used for describing and comparing soil‐forming factors and processes. It is concluded that these factors and processes play major roles in influencing soil use and management. There are also strong relationships between these factors and processes and the relevant soil taxa from Soil Taxonomy.     

河北省2002-2008年土地征收制度实施绩效评价

为了探索河北省土地征收制度的实施绩效,在构建完整的绩效评价指标体系的基础上,通过资料收集和整理,运用均值化处理、客观法赋权、线性评价的方法,对河北省土地征收制度的实施绩效进行研究.结果表明:河北省土地征收制度实施绩效呈逐步上升态势,其中,经济绩效良好,公平效益绩效和结构效益绩效相对偏低,但都有逐步提升的趋势；影响河北省土地征收制度实施绩效的障碍因素主要有房价收入不合理、各种用地比例不协调、农村和城市生活水乎差距偏大、失业率增加等.同时,提出了完善河北省土地征收制度的相关措施.     

河北农业大学教学实验林场经营机制创新探究

文章对河北农业大学教学实验林场10年来的发展实践进行了探索总结：解放思想,转变观念,从自身实际情况出发,夯实基础,服务教学;创新经营机制,多渠道整合资源;树立可持续发展经营理念,为长远发展奠定基础使林场走出困境,迈向了良性循环。     

对河北农村公共文化服务建设的一点思考

加强农村公共文化服务体系建设,满足农民的基本文化需求,是繁荣发展社会主义先进文化、构建社会主义和谐社会的必然要求,是实现好、维护好、发展好人民群众基本文化权益的主要途径。     

河北坝上地区天然草地豆科植物区系研究

对河北坝上地区天然草地豆科牧草的植物区系进行调查研究与统计分析,结果表明:该地区野生豆科植物有14属41种,少种属、单种属居多;植物区系组成有6个分布区类型与4个变型,温带性质明显;优势生活型为多年生草本。     

藤本植物在闽北公路边坡绿化中的应用研究

本文通过对闽北山区公路边坡绿化现状的分析,结合闽北山区条件和藤本植物在边坡绿化中的优势,筛选出几种适合在闽北山区公路边坡绿化中应用的藤本植物,以期指导闽北山区公路边坡绿化。     

循环经济模式下冀北山区生态果园的建设与发展

随着可持续发展战略的实施，探索较优的生态农业模式是当前我国生态农业主要研究方向。本研究对冀北山区果园现状、脆弱性、建园模式进行分析的同时，也对果园建设提出了期望。     

广西、粤北和粤西北发展中田大山楂战略研究

中田大山楂现已经通过市场的影响在广西、粤北和粤西北以产业化的速度和方式发展。为使中田大山楂真正能够健康快速地发展,发挥该特色资源性品种的真正价值,该文从中田大山楂的品种、功能成分以及生态和产业化发展的条件优势和特点进行分析和研究,以引起相关部门和该地区广大干部群众的重视,为中田大山楂的发展提供参考。