优质双孢蘑菇堆肥的现代堆制模式

本文从现代双孢蘑菇堆肥的配方，一次发酵的堆制程度，二次发酵技术和相关的一些重要理化指标等方面简要地介绍了优质蘑菇堆的现代堆制模式和方法，从而阐明现代堆制模式比传统方式的优越性。     

岩棉作为草坪草育苗基质的坪床性能初探

对岩棉作为草坪草生长基质的可能性进行了初步研究,发现草坪草在岩棉上能够生长良好,较低密度的岩棉更为合适;应用岩棉田问建植草坪应解决好种子、岩棉、土壤三者相互固定的问题;岩棉本身并不具有很强的保水性能,但作为播种覆盖材料时,由于它是横向纤维压制而成,切断了土壤毛管作用,减少水分蒸发,表现出非常强的节水作用。     

冷季型草坪草混播配方优化组合筛选研究

在贵州气候条件下,通过对草地早熟禾、高羊茅、多年生黑麦草3种冷季型草坪草不同品种的19种混播配方进行了适应性和成坪品质的详细观察测定,筛选出了适应当地气候条件下的优化组合配方3种。     

蛹虫草人工栽培条件优化研究

蛹虫草是一种珍贵的药食同源大型真菌．其市场需求日益增加。为加强蛹虫草的人工栽培．从料水比、菌种浓度、接种量和暗培养时间等4个因素进行正交试验．发现接种量（15、20、25mL／瓶）和菌种浓度（6、11、15个／mL）起着重要的作用，而料水比（1：1、1：1．2、1：1．5）和暗培养时间（2、3、4d）作用较小，并优化出高产培养条件．即料水比1：1．5、菌种浓度15个／mL．接种量25mL／瓶和暗培养时间为3d。在此优化条件下．每20g大米能生产出高达17．96g鲜子实体。     

干法膨化宠物饲料技术参数关系的研究

采用双螺杆膨化机干法工艺对宠物全价粉状饲料进行膨化并制粒,研究所得产品的容重与淀粉糊化度、硬度指标之间的关系,以及设备参数和配方特性对颗粒饲料容重的影响。结果表明:容重与淀粉糊化度、硬度密切相关;设备参数与配方特性均对产品容重有极显著影响;通过容重的测定估测其熟度和硬度具有可行性;可以通过调节喂料速度和膨化玉米比例控制产品容重。     

Vermicompost as a substitute for peat in potting media: Effects on germination,biomass allocation,yields and fruit quality of three tomato varieties

Commercial potting media often contain substantial amounts of peat that was mined from endangered bog and fen ecosystems. The main objectives of this study were to assess (1) whether the amendment of 0, 20, 40, 60, 80 and 100% (v/v) of vermicompost (VC) to a fertilized commercial peat potting substrate has effects on the emergence, growth and biomass allocation of tomato seedlings (Lycopersicon esculentum Mill.) under greenhouse conditions, (2) whether possible impacts on seedlings can affect tomato yields and fruit quality even when transplanted into equally fertilized field soil, and (3) whether effects are consistent among different tomato varieties. Amended VC was produced in a windrow system of food and cotton waste mainly by earthworms Eisenia fetida Sav. Vermicompost amendments significantly influenced, specifically for each tomato variety, emergence and elongation of seedlings. Biomass allocation (root:shoot ratio) was affected by VC amendments for two varieties in seedling stage and one field-grown tomato variety. Marketable and total yields of field tomatoes were not affected by VC amendments used for seedling husbandry. However, morphological (circumference, dry matter content, peel firmness) and chemical fruit parameters (contents of C, N, P, K, Ca, Mg, l-ascorbic acid, glucose, fructose) were significantly affected by VC amendments in seedling substrates; these effects again were specific for each tomato variety. Overall, vermicompost could be an environmentally friendly substitute for peat in potting media with similar or beneficial effects on seedling performance and fruit quality. However, at least for tomatoes, variety-specific responses should be considered when giving recommendations on the optimum proportion of vermicompost amendment to horticultural potting substrate.     

吴震东公式简化计算研究

混凝土工程冬季施工主要采用非加热养护方法，这类方法的技术关键是精确的热工计算，而热工计算目前仍广泛应用吴震东理论，按吴震东理论建立的整套公式可以描述混凝土在各咎情况下温度时间变化规律，但由于吴东公式较为复杂，许多学者对简化吴震东公式作了深化入的研究和讨论，据此分析了简化吴震东公式的思路、途径与方法，并评价了各类简化公式和近似公式的优点与不足之处。     

Competition for food between Eurasian perch (Perca fluviatilis L.) and ruffe (Gymnocephalus cernuus [L.]) over different substrate types

Abstract –  Food consumption by Eurasian perch ( Perca fluviatilis L.) and ruffe ( Gymnocephalus cernuus [L.]) was studied in single and mixed-species treatments in the laboratory, where alternative food resources, chironomids and zooplankton, were offered simultaneously. The effects of structural complexity, which was represented by substrate grain size, and of feeding level on food consumption were analysed. Across all experiments, the outcome of competition between perch and ruffe depended on food abundance and on the structural complexity of the environment. Perch and ruffe both changed their food consumption in the presence of a heterospecific competitor. With high food supply, perch consumed more benthic food than ruffe. With low food supply, the consumption of perch decreased strongly, while that of ruffe remained high on fine sediment. Under all conditions tested, the mechanism of competition appeared to be of interference rather than of exploitative nature. It is suggested that with decreasing lake productivity caused by re-oligotrophication, habitat shifts of both species will occur, which will alleviate interspecific competition. Ruffe will forage over fine sediment and perch over coarse sediment, whereby both species will achieve the highest foraging efficiency under conditions of low food supply.     

香菇烂筒病及其病因研究初报

本文报道了香菇烂筒病的发生情况、症状及病原体的鉴定。笔者在福建省不同地方调查了早、中、晚期发病且症状明显的菇筒,分离、培养、鉴定了病原,并作回接发病试验,证实土壤中的木霉(Trichoderma spp.)是引起烂筒病的重要病原。     

基于投资的再保险定价模型

从系统的观点出发,把公司的赔付情况与投资收益相接合,对比例再保险与超额损失再保险,建立了在投资影响下的带跳的再保险模型,给出了基于投资的再保险定价公式,为公司厘订再保险费提供了新的方法.