河南西峡老界岭自然保护区观赏植物资源

本在调查,收集,整理的基础上,初步筛选出野生观赏植物２２９种及变种,隶属于６５科１４４属,其中乔木类６１种,灌木类７３种,攀援类２９种,草本６５种,并对西峡老界岭自然保护区观赏植物的保护与利用提出了建设性意见。     

任意k+1个相邻自然数k次方的k次差等于k阶乘

经研究发现一个数学规律,即ｋ＋个相邻的自然数的ｋ次方,其ｋ次差等于ｋ！,当ｎ≥１时,相邻ｋ＋ｎ＋１个自然数的ｋ次方的ｋ＋ｎ次差则均为０,这个规律体现了自然自身的内在联系,通过数学归纳法进行严格的理论证明,证明了所给命题的正确性。     

福建省农业资源与环境问题探析

福建省农业资源总量丰富,但耕地不足,农业资源地区差异显著,经济发展所带来的环境压力大,根据土地质量下降,水土流失,环境污染等问题,提出总量控制与提高潜力相结合,果园改造与生态保护相结合,科学要求与区域发展相结合,规模特色与多种经营相结合等资源利用与环境保护策略。     

建设闽东南特色农业带的自然条件分析

围绕闽东南这一特定区域,研究其自然条件的基本特征及属性,讨论其在省内的比较优势,根据闽东南的资源优势论证其发展特色农业带的有利条件,提出今后闽东南地区特色农业应以水果及水产养殖专业带为主导的思路。     

重庆市综合自然灾害分区研究

重庆市自然灾害较为严重 ,不仅灾害种类较多 ,而且影响范围很广 .根据重庆主要自然灾害的特点、受灾程度、类型组合及排序、以及各区县防灾抗灾能力等 ,将重庆市划分为 4个综合自然灾害区 .各区按其内部差异再划分出 7个灾害亚区 .其目的是为了更好地掌握各灾种的分布、组合、危害、防治的地区差异 ,以指导各地区的防灾减灾工作 .     

Terrestrial heat flow in Junggar Basin, Northwest China

Based on temperature logs of 117 boreholes and thermal conductivity of 119 rock samples, the first group of 35 heat flow data in the Junggar Basin are presented. The thermal gradients vary between 11.6 and 26.5°C/km, and the thermal conductivity changes from 0.17 to 3.6 W/mK. Heat flow ranges from 23.4 to 53.7 mw/m² with a mean of (42.3±7.7) mW/m². The heat flow pattern shows that heat flow is higher in the uplifts and lower in the depressions. The factors affecting the heat flow and its distribution include basin type, basement structure, sediment thickness, radioactive heat generation, etc. The overall low present-day heat flow in the Junggar Basin reflected its tectonothermal evolution characterized by lithospheric thickening, thrust and fault at shallow crust as well as consequently quick subsidence during the Late Cenozoic.     

One-step disposal of Cr (Ⅵ)-bearing wastewater by natural pyrrhotite

Cr(VI)-bearing wastewater can be treated by natural pyrrhotite which is used for reductant to reduce Cr(VI) and precipitant to precipitate Cr(III) simultaneously. The disposal products can be divided into three parts in the beakers, namely supernatant in the upper part, the yellowish colloidal precipitates in the middle part and the pyrrhotite in the lower part. The content of total Cr=Cr(VI)+Cr(III) in the supernatant liquid is 0.06 mg/L, which is lower than 1.5 mg/L of the discharge standard of China and near to 0.05 mg/L of the standard of potable water. This one-step disposal composing of both reduction and precipitation which is traditionally divided into two independent steps called reducing technology and precipitating technology respectively. The new method is of obvious economic advantage and favourable to decreasing surplus mud derived from adding Ca(OH)₂ to precipitate Cr(III) traditionally so as to avoid recontamination. In fact, sodium sulfite (Na₂SO₃) used in disposal of Cr(VI) was traditionally produced from natural mineral of pyrrhotite (FeS). One molecule of FeS is 4 times more than that of Na₂SO₃ from a view point of rational use of mineral resources. Therefore the prospective of application of the one-step disposal of Cr(VI) method is full of promise.     

One-step disposal of Cr (Ⅵ)-bearing wastewater by natural pyrrhotite

Cr(Ⅵ)-bearing wastewater can be treated by natural pyrrhotite which is used for reductant to reduce Cr(Ⅵ) and precipitant to precipitate Cr(Ⅲ) simultaneously. The disposal products can be divided into three parts in the beakers,namely supernatant in the upper part,the yellowish colloidal precipitates in the middle part and the pyrrhotite in the lower part. The content of total Cr=Cr(Ⅵ)+Cr(Ⅲ) in the supernatant liquid is 0.06 mg/L,which is lower than 1.5 mg/L of the discharge standard of China and near to 0.05 mg/L of the standard of potable water. This one-step disposal composing of both reduction and precipitation which is traditionally divided into two independent steps called reducing technology and precipitating technology respectively. The new method is of obvious economic advantage and favourable to decreasing surplus mud derived from adding Ca(OH)2 to precipitate Cr(Ⅲ) traditionally so as to avoid recontamination. In fact,sodium sulfite (Na2SO3) used in disposal of Cr(Ⅵ) was traditionally produced from natural mineral of pyrrhotite (FeS). One molecule of FeS is 4 times more than that of Na2SO3 from a view point of rational use of mineral resources. Therefore the prospective of application of the one-step disposal of Cr(Ⅵ) method is full of promise.     

论资源可持续发展的法律补救责任理论

以资源可持续发展的理论为基础 ,运用行政法与民法的违法责任理论 ,从资源补救责任的设立目的、内容和构成要件、主体及其代位、履行原则等方面 ,结合我国实际 ,对资源补救责任理论进行了深入的分析与探讨     

面向21世纪的中国农业工程议程探索

本文回顾了我国 ２０００～ ２０３０年瓶颈时期食物安全和农业水资源安全问题的各种预测;讨论了农业科技的对策;提出了实现中国农业现代化也及贯彻国家生态环境建设规划（２０００～２０５０）所需优先发展的农业工程科技领域、建议在这些优先领域,大力开展结合各个地区特定条件的国际合作研究和合资经营。开发、推广与实施先进适用型技术、指出这是获得未来潜在市场最高份额以及快速发展的途径。