生肖鸡的传说     

阿培 《河南国土资源》2005,(2):45-45

鸡，在十二生肖中排行第十。因每天下午5～7点(即酉时)日落时鸡便归窝夜宿，故鸡的十二地支配属为“酉”。  相似文献   

Silicon limitation on primary production and its destiny in Jiaozhou Bay, China——Ⅳ：Study on cross-bay transect from estuary to ocean   总被引：1，自引：0，他引：1  

Yang Dongfang  Chen Yu  Gao Zhenhui  Zhang Jing  Wang Fan 《中国海洋湖沼学报》2005,23(1):72-90

The authors analyzed the data collected in the Ecological Station Jiaozhou Bay from May 1991 to November 1994, including 12 seasonal investigations, to determine the characteristics, dynamic cycles and variation trends of the silicate in the bay. The results indicated that the rivers around Jiaozhou Bay provided abundant supply of silicate to the bay. The silicate concentration there depended on river flow variation. The horizontal variation of silicate concentration on the transect showed that the silicate concentration decreased with distance from shorelines. The vertical variation of it showed that silicate sank and deposited on the sea bottom by phytoplankton uptake and death, and zooplankton excretion. In this way, silicon would endlessly be transferred from terrestrial sources to the sea bottom. The silicon took up by phytoplankton and by other biogeochemical processes led to insufficient silicon supply for phytoplankton growth. In this paper, a 2D dynamic model of river flow versus silicate concentration was established by which silicate concentrations of 0.028–0.062 μmol/L in seawater was yielded by inputting certain seasonal unit river flows (m³/s), or in other words, the silicate supply rate; and when the unit river flow was set to zero, meaning no river input, the silicate concentrations were between 0.05–0.69 μmol/L in the bay. In terms of the silicate supply rate, Jiaozhou Bay was divided into three parts. The division shows a given river flow could generate several different silicon levels in corresponding regions, so as to the silicon-limitation levels to the phytoplankton in these regions. Another dynamic model of river flow versus primary production was set up by which the phytoplankton primary production of 5.21–15.55 (mgC/m²·d)/(m³/s) were obtained in our case at unit river flow values via silicate concentration or primary production conversion rate. Similarly, the values of primary production of 121.98–195.33 (mgC/m²·d) were achieved at zero unit river flow condition. A primary production conversion rate reflects the sensitivity to silicon depletion so as to different phytoplankton primary production and silicon requirements by different phytoplankton assemblages in different marine areas. In addition, the authors differentiated two equations (Eqs. 1 and 2) in the models to obtain the river flow variation that determines the silicate concentration variation, and in turn, the variation of primary production. These results proved further that nutrient silicon is a limiting factor for phytoplankton growth. This study was funded by NSFC (No. 40036010), and the Director's Fund of the Beihai Sea Monitoring Center, the State Oceanic Administration.  相似文献   

亚洲第一村：黄柏峪——中美可持续发展示范村纪行     

苏梅 《国土资源》2006,(9):22-30

人类的生态系统是循环的、可持续的。传统意义上的废物和垃圾都是可利用的。中美可持续发展示范村黄柏峪在发展农村经济、转变生存观念上走出了一条可持续发展的新路,形象的喻为:“从摇篮到摇篮。”黄柏峪所选择的道路,是新世纪建设社会主义新农村可以借鉴的一种模式。  相似文献   

豫西熊耳山地区金银成矿带区域成矿模式研究     

陈德杰  陈德杰 《河南国土资源》1996,(3)

熊耳山地区金银成矿带已发现大中型矿床九处和百余处小型矿床及矿化点。研究表明，这些矿床（点）均发育在太古代花岗绿岩带基础之上，成矿受地层、岩体、构造的联合控制，属于同一成矿系列。文中提出“老地层—新岩体—同构造”改造型区域成矿模式，并对相关问题进行了初步分析。  相似文献   

我国西北高原盆地全新世沉积与环境变迁   总被引：1，自引：1，他引：0  

黄春长 《干旱区地理》1990,(2)

本文通过对我国西北高原、盆地全新世黄土、古土壤、风沙层,冰缘层、冰碛层、盐(?)沉积、人类聚落位置迁移,植被演变等系统分析,论证了全新世气候和环境变化规律。认为(?)新世包含六个气候变化阶段,构成了三个冷干——暖湿气候旋回,每一旋回的周期大约为3600或3700年。  相似文献   

中国黑龙江首届地理信息产业高层论坛暨黑龙江省地理信息产业园奠基仪式     

《地理信息世界》2005,3(3):i005-i005

6月16日，中国黑龙江首届地理信息产业高层论坛在黑龙江测绘局隆重举行，此次论坛以地理信息产业发展为主题。由黑龙江省政府、国家测绘局主办。黑龙江测绘局、黑龙江省地理信息产业园承办。黑龙江测绘局局长李志刚在论坛上致词，国家测绘局局长陈邦柱对论坛的举办表示热烈的祝贺，并作重要讲话。  相似文献   

浅议土地储备制度存在的问题及对策   总被引：3，自引：0，他引：3  

王晓梅 《河南国土资源》2005,(9):16-17

一、我国土地储备制度的产生是历史发展的必然 据2003年统计，我国国有资产总量为33万亿元，其中国有土地资产就有25万亿元，约占80%。在计划经济体制下，这笔巨额土地资产隐含在土地的无偿、无限期、无流动使用之中。随着社会主义市场经济体制的不断深入和完善，如何加快土地制度改革步伐，将巨额土地资产尽快显化、盘活并作为一种资本经营，对于推动经济发展，推进城市化进程具有重要的战略性意义。  相似文献   

加强经济开发是西部地区脱贫致富的必由之路     

艾云航 《自然资源》1990,(6):15-19,14

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中国南极长城湾及附近海区1993／1994年夏季表层水样无机氮,磷酸盐…     

《海洋湖沼通报》1996,(4):13-19

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关于中国东北松辽盆地含铀性初步分析的情况报告     

捷.  ВМ 于文卿 《吉林地质科技情报》1996,(3):12-14

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