毛竹纤维饱和点随竹龄的变化规律

竹材的纤维饱和点对于竹材的加工利用具有重要指导意义。以毛竹为研究对象,采用力学法和水分吸着等温线法对毛竹纤维饱和点及其随竹龄的变化规律进行了系统研究。结果表明,两种方法所得的纤维饱和点不同,顺纹抗压强度法0.5龄为36.12%;1.5～4.5龄为(24.49±0.78)%,水分吸着等温线法0.5龄为24.51%;1.5～4.5龄为(18.38±0.42)%;两种方法测得纤维饱和点的绝对数值虽然存在一定差异,但随竹龄的变化规律相同,即从0.5龄到1.5龄降幅明显,大于1.5龄后趋于稳定。     

庆元县受雨雪冰冻灾害毛竹林恢复重建技术探讨

庆元县位于浙江省西南边陲,东邻福建省寿宁县,南接福建省政和县,西挨福建省松溪县,北靠本省龙泉市、景宁县。竹产业经济在庆元举足轻重,已成为庆元县农民经济收入的主要来源,是庆元县国民经济的支柱产业。受2008年2月初雨雪冰冻灾害影响,庆元县毛竹林受灾严重,给竹农带来了巨大的损失。为使受灾竹林尽快恢复生产,减少因受灾而出现的返贫农户数,尽快恢复竹林的效益,庆元县多举措加快受灾竹林的恢复重建。     

帽儿山林场林地资源资产评估

以东北林业大学帽儿山试验林场为研究对象,利用2004年帽儿山林场二类调查资料数据以及相关的技术资料和参数,结合林地资源评价方法对其东林施业区进行评估。利用现有数据对立地等级进行划分,选用收益现值法,结合林场实际情况使用专家打分法即Delphi法编制了立地质量得分表,得出东林施业区的林地地价为15 307 637.71元。此次评估为实现林地资源的资产化管理及促进林场资产的合理利用和优化配置提供基础性的数据,对推进森林资源的商品化、促进森林保护事业的发展有着十分重要的意义。     

Dynamics and Distribution of Nutrition Elements in Bamboos

ABSTRACT

Mao bamboo (Phyllostachys pubescens) with a high production and wide utilization has been planted in large scale in southern China, but little information about bamboo nutrition is available. The objective of this study was to reveal the dynamics of nutrition with growing time and the distribution of nutrition in different organs. It was found that the nutrition concentration of the whole plant generally declined with time during the period of 1–6 weeks owing to a dilution effect with the result of quickly increasing the biomass. The leaf concentration of nitrogen (N), phosphorus (P), and potassium (K) changed regularly with high concentrations observed at age 1, 2, 4, and 6, and lower at age 3 and 5. While the concentration of N, P, and K in the branch and stem generally declined with the weeks, a rapid decrease occurred from weeks 1 to 2. The concentrations of calcium (Ca) and magnesium (Mg) in bamboo leaf, branch, and stem appeared to be opposite to those of N, P, and K in corresponding plant parts. The elemental concentrations were greater (P < 0.05) in the leaves than in the branches and stems, while the storage of nutrition was greater (P < 0.05) in stem than in leaves and branch. A relative large total storage of nutrition, except P and Mg, were found in bamboo under an intensive management (IM) stand than those under extensive management (EM) stand. The total storage of different nutritions in the above-ground parts was in the order: K (243.0–285.6 kg ha^?1) > N (154.5–207.8 kg ha^?1) > P (10.4–12.2 kg ha^?1). The nutrition stored in the bamboo plant would be removed away from the soil in every other year by the means of harvest of the bamboo trunk which is the largest nutrition pool of the bamboo plant. Therefore, supplementary nutrients, especially N and K, are strongly recommended in order to keep the productivity of bamboo.     

《毛泽东思想概论》在素质教育中的作用

本结合素质教育的要求和大学生综合素质的现状,探讨了《毛泽东思想概论》在思想品千教育、人素质教育、心理素质教育等方面的作用。     

毛泽东道德观的形成过程与内容实质

论述了毛泽东道德观的形成过程及其主要内容。指出毛泽东道德观的确立深受其家庭、学校和湖湘文化的影响,后来逐渐接受马克思列宁主义发展成为共产主义道德观,其精神实质和核心是为人民服务。     

Leadership for Sustainable Development

Abstract

Three popular terms-leadership, sustainable and development-are examined. The paper argues that these three terms must be separated rather than combined if they are to aid our understanding and management of human and natural resources to meet challenges of an increasing human population with rising expectations for ever rising material gains. The contrasting theories and practices of Chairman Mao and Taoism ‘test’ these ideas and suggest the sideboards of alternatives in applying the three concepts to social ecological challenges of the 21st century. A modern theory of diffusion of innovation suggests how leaders might establish a ‘sustainability science’ whose findings could encourage the acceptance by humanity of a covenant of constraint on material consumption in conjunction with an ark of technical opportunity for more effective and efficient systems of material management.     

略论毛泽东农业合作社思想的产生和演变

本文认为毛泽东的农业生产合作化思想是在长期的革命实践中产生和发展起来的。它经历了萌芽、发展、进一步发展以及成熟四个阶段,每个阶段都是对前一个阶段的继承和发展,并最终形成了他关于农业生产合作社的较完备的思想。     

“五四”时期毛泽东解放思想的理论与实践

“五四”时期毛泽东积极倡导解放思想,先是主张依靠群众、运用温和方式,后是主张运用暴力革命、无产阶级专政的方式进行社会变革。在这一过程中,毛泽东不仅影响和改造了社会,而且使自己由一个初具共产主义思想的知识分子,成长为一个坚定的马克思主义者。     

竹材霉变生物学的研究*Ⅰ.毛竹材致霉菌与致霉特征

确证15种霉菌可引起毛竹材霉变，对这15种霉菌的分类学形态特征及其在毛竹材上诱致的霉变外貌特征进行了详细描述；指出其中10种霉菌为毛竹材重要致霉菌，提出在竹材霉变试验中可选用菌体相对覆盖量目测法估计竹材霉变程度。