矿山林业可持续发展问题研究

结合鸡西矿业集团林业发展的实际情况,通过对其林业可持续发展现状的分析,归纳和总结了其中存在的问题。从而从理顺矿区林业管理体制、合理调减木材产量、林业生产项目调整与优化等方面,有针对性地提出了比较合理又具有可操作性的发展对策和建议。     

广西矿区大气沉降与稻米重金累积的关系分析(英文)

笔者就大气沉降的概念、来源及其危害作了简要的概述,并对广西矿区大气沉降与稻米重金属累积的关系作简要分析,以期对广西矿区重金属沉降污染实施有效的风险预警,确保稻米安全生产提供参考。     

喷灌水量分布动态模拟与均匀性研究

为研究压力、喷头组合方式和插值方法对喷灌均匀系数CU和分布均匀系数DU这两个评价指标计算结果的影响规律,利用雨量筒径向间隔为1 m的FY RB-471型喷头无风喷洒试验数据,模拟出了喷头在不同压力下的水量分布情况。在喷头矩形组合方式和正三角形组合方式下,采用线性插值、立方插值、三次样条插值、距离插值和平面插值法计算了不同压力下的喷灌均匀系数和分布均匀系数。结果表明,采用三角形组合方式比矩形组合方式计算的喷灌均匀系数CU高1.56~4.77个百分点,同样,三角形组合方式比矩形组合方式计算的分布均匀系数DU高4.26~9.19个百分点;不同的插值方法对喷灌均匀系数与分布均匀系数的计算结果影响不明显,而压力是影响喷灌均匀系数的一个重要因素。     

城郊矿区废弃地观光农业生态规划

以徐州城北生态农业公园总体规划为例,推行生态造园理念,精心构思农业项目,在矿区废弃地生态修复与景观格局重建、城郊观光农业生态规划理论与方法方面进行了有益的探索。提出将城郊矿区废弃地生态恢复与观光农业建设相结合的发展思路,促进区域生态、经济的可持续发展。     

基于图书馆流通数据的聚类分析研究

利用聚类分析中的K-means算法分别对图书和读者进行了聚类分析,从中找出图书的借阅规律,读者借阅图书的某种倾向及读者是否活跃,从而制定出相应的决策,以便有针对性地丰富馆藏资源和优化图书馆的馆藏布局,并为图书馆开展个性化服务提供参考。     

西藏铜多金属矿山土地破坏分析及土地复垦研究

分析了西藏甲玛矿区的土地破坏情况,采用主导因素法将土地破坏程度分为轻度破坏、中度破坏和重度破坏,并结合矿区的自然资源条件,提出了＂工程措施结合下树上草＂的土地复垦模式。     

基于粗糙集的高校图书馆用户评价分析

现代图书馆是以用户（读者）为中心,加强对用户评价的调查和数据处理对改善图书馆工作具有重要的意义。利用粗糙集理论的属性约简和区分函数等工具,对学校图书馆日常调查所积累的用户对图书馆服务质量的评价数据进行分析,给出了一个挖掘其中隐藏的模式和知识的方法,有助于图书馆管理层提高服务水平和促进馆员素质建设。     

Phosphorous accumulation and distribution of two ecotypes of Pilea sinofasciata grown in phosphorous-enriched soils

Water eutrophication and poultry manure require an efficacious remediation technology to decrease phosphorous (P) concentration. In this study, the P phytoremediation potential of a mining (ME) and nonmining ecotype (NME) of Pilea sinofasciata were analyzed by pot experiments employing different concentrations of P treatments (CK, P100, P200, P400, P800 and P1600) in tested soil. Growth, P accumulation and P-relevant enzyme activities of P. sinofasciata in ME and NME were assessed after 10 weeks’ plantation. The results showed that there was no significant difference between the shoot biomass of the ME and NME. Higher P concentration and accumulation were observed in the ME than NME for all treatments. Stem P concentration of the ME were 117%, 189%, 152%, 153%, 140% and 139% higher than the NME, and leaf P concentration were 122%, 146%, 138%, 144%, 137% and 113%. Maximum P uptake and phytoextraction was observed at P400 for the ME of P. sinofasciata. Elevated activities of acid phosphatase and phytase in roots were examined in P-enriched soil, and the ME presented higher activities compared with the NME. The results in this paper provide a theoretical basis for the use of ME of P. sinofasciata for phosphorus accumulators and suggest that ME of P. sinofasciata is a promising species for the excess P phytoextraction of P-enriched soils.     

Plant nutrients in a degraded soil treated with water treatment sludge and cultivated with grasses and leguminous plants

The objective of this work was to evaluate rates for applications of water treatment sludge (WTS) as a nutrient source for grasses and leguminous plants cropped in a soil degraded by tin mining in the Amazon Region (Natural Forest of Jamari, Rondonia State, Brazil). The treatments consisted of three rates of nitrogen supplied by WTS (100, 150 and 200 mg kg⁻¹ soil), five combinations of plants, two controls (absolute control, without fertilization; and chemical control, soil+lime+chemical fertilizers). WTS modified the contents of macro and micronutrients in the degraded soil, but it was not, as used in the present study, sufficient for the rehabilitation of the degraded area.     

鹤岗矿业集团林业处森林经营方案的编制

根据鹤岗地域上的类似性和差异性,确定"十二五"期间该市在林业管理上的经营方针和目标。