基于网络自主学习与课堂教学结合的“土壤肥料学”教学改革与实践

引导大学生进行网络环境下的自主学习是高等教育的未来发展趋势。由于“土壤肥料学”课时不断压缩,完全由教师课堂讲授难以取得较好的效果。开展基于网络自主学习与课堂教学相结合的“土壤肥料学”教学改革,即在教师引导下,充分利用上课前5~10分钟和三段式课堂教学,可以提高教学效果。     

高职《土力学与地基基础》课程教学改革探析

“工学结合”是人才培养层面上的一种育人模式,是职业教育本质特征的必然要求。就《土力学与地基基础》课程而言,课程改革应当结合实际,坚持“工学结合”人才培养模式,从完善教学大纲和课程标准、重组教学内容、加强实践教学、改进教学方法等方面,采取积极的改进措施。     

电动力学中几个习题答案的商榷

本文通过对几个答案有误习题的求解,更正所用教材提供的答案,同时为学生解题提供一定的解题技巧。     

Phytoremediation of heavy metal polluted soils and water：Progresses and perspectives

Environmental pollution affects the quality of pedosphere, hydrosphere, atmosphere, lithosphere and biosphere. Great efforts have been made in the last two decades to reduce pollution sources and remedy the polluted soil and water resources. Phytoremediation, being more cost-effective and fewer side effects than physical and chemical approaches, has gained increasing popularity in both academic and practical circles. More than 400 plant species have been identified to have potential for soil and water remediation. Among them, Thlaspi, Brassica, Sedum alfredii H., and Arabidopsis species have been mostly studied. It is also expected that recent advances in biotechnology will play a promising role in the development of new hyperaccumulators by transferring metal hyperaccumulating genes from low biomass wild species to the higher biomass producing cultivated species in the times to come. This paper attempted to provide a brief review on recent progresses in research and practical applications of phytoremediation for soil and water resources. Project supported by the Higher Education Commission, Government of Pakistan for the faculty training under the R & D Project “Strengthening Department of Soil Science and Soil and Water Conservation” at the University of Florida, USA, a grant from the St. Lucie River Water Initiative (SFWMD contract No. OT060162), USA, in part, and the Program for Changjiang Scholars and Innovative Research Team in University (No.IRT0536), China     

石油高校工程力学课程教学实践与思考

工程力学课程是石油高校工科专业的通用公共基础课,对学生学习其他专业课程具有重要影响。受学生课外活动、学校教材、培养方案、教师教学方法、学生学习积极性等因素的影响,教师教学和学生学习过程中仍存在一些问题,例如,学生无法保证充足的学习时间、教学难点无法掌握、教师与学生无法及时沟通相关知识等。针对这些普遍问题,结合近年来的教学经历和经验,进行了石油高校工程力学教学的思考,并提出了一些措施。     

Aluminum extractability in red soils as influenced by land use patterns

This study on the effect of land use on soil quality in relation to forms and toxicity of aluminum in red soils (Ultisol) in southeast China showed that in general, the extractable order for soil active aluminum by four extractants was: NaOH 0.5 mol/L > HCl 1 mol/L > NH4Ac 1 mol/L > KCl 1 mol/L . Different uses of the red soils, developed from Quarternary red clay with the similar hydrogeological environment, greatly affected the amount of active aluminum, especially the exchangeable Al3+. The order of exchangeable Al3+ (Al mg/kg) in the red soils with different land uses was: barren land (740) > tea garden (663) > peach garden (432) > citrus garden (234) > paddy soil (127). The content of water soluble aluminum in the red soils was highly sensitive to soil acidity.     

梅菜地膜覆盖栽培试验

1999～2000 年于惠州梅菜原产地兼主产区—土桥进行了梅菜地膜覆盖栽培试验。结果表明: 该栽培法和常规栽培相比, 土壤温度、土壤含水量、土壤有机质含量和土壤孔隙度分别提高517 ℃、2615 %、41117 %和17114 % ,移栽后幼苗成活时间提早4d , 移栽后一个月幼苗株高和株幅分别提高1610 %和5116 % , 产量提高2918～5813 %.     

思维导图在土力学教学中的应用

土力学课程是土木工程等工程类专业重要的专业基础课,具有基本概念多、知识点琐碎、内容庞杂、公式多等特点,学习难度较大。本文将思维导图引入土力学理论和试验教学中,有助于引导学生构建知识网络,实现自主学习。     

牛顿力学在物理学中的地位

文章简要介绍了物理学发展的历史,从中引出了牛顿力学在物理学中的重要地位,以牛顿的《自然哲学的数学原理》为代表的经典力学体系的建立,是科学发展历史进程的一个重要里程碑,除此以外,牛顿还在光学、热学、数学、天文学等方面为人类做出了不朽的贡献,本文通过对牛顿力学内容、地位的简要介绍,使我们认识到牛顿以及牛顿力学对当今物理世界乃至全人类科学起到的巨大作用.     

论茂名小良的生态修复及国土整治

围绕人地关系这个永恒的主题,探究了茂名小良水保站生态修复和经济发展中存在的主要问题。通过数学建模,提出了促进生态、社会经济可持续的发展建议:水土保持林有效覆盖率和土地资源合理利用规划模型,对其他水土流失地区有一定的借鉴作用。