生防菌株Men-myco-93-63发酵培养条件研究

对生防链霉菌Men-myco-93-63进行了摇瓶培养条件试验。结果表明,培养温度30℃,培养基初始pH值7.5,500ml三角瓶装液100ml,摇床转速200r/min为最适摇瓶发酵培养条件。在优化的培养条件基础上进行了摇瓶中代谢情况的测定,并在摇瓶试验的基础上进行了30L发酵罐试验,为进一步发酵规模化生产奠定了基础。     

桑黄子实体多糖提取条件的研究

通过单因子试验和正交试验，研究了桑黄（Phellinus igniarius）子实体多糖的提取条件。结果表明，热水浸提法提取桑黄子实体多糖的最佳条件为料水比1：30（W：V）。提取温度90℃，提取时间3h，乙醇终浓度80％。同时采用超声波法提取桑黄子实体多糖，其多糖得率为4．65％。     

Effect of cultural practices on the development of arabica coffee berry disease,caused by <Emphasis Type="Italic">Colletotrichum kahawae</Emphasis>

In the high altitude regions of Africa, coffee berry disease (CBD), caused by Colletotrichum kahawae, is the main constraint for arabica coffee (Coffea arabica) production. However, certain agricultural practices can reduce losses caused by the disease and thereby promote optimum production. On small family farms in Cameroon, mixed cropping with fruit trees, intercropping with food crops and maintenance pruning of coffee trees are very widespread agricultural practices that can affect CBD epidemics. Consequently, an epidemiological study was conducted to assess how cultural practices affected the disease in an arabica coffee smallholding in Cameroon. The disease was monitored on a weekly basis over four successive years (2002–2005) on coffee trees in diverse cultural situations. Cultural practices likely to reduce losses due to CBD were identified. The infection rate was significantly lower on coffee trees grown intensively than on coffee trees grown in the traditional manner. Coffee trees located under the shade of fruit trees were significantly less attacked than those located in full sunlight. In addition, berries on the leafless parts of branches, near the main trunk of the coffee tree, were less infected than those on leafy sections. These results show that maintenance pruning, removal of mummified berries, and mixed cropping with shade plants are cultural practices which create environmental conditions that limit CBD development.     

振荡发酵生产球形细菌纤维素

采用振荡发酵生产球粒形细菌纤维素,以提供外观和口感新颖独特的纤维素产品.结果表明:培养基的碳源浓度、椰子水添加量、装瓶量、振荡速度等对纤维素颗粒的形状、产量影响较大.最佳发酵工艺为:15g/L蔗糖,(NH4)2SO43 g/L,KH2PO43g/L,MgSO4·7H2O 0.2 g/L,酵母粉0.5 g/L,20%(ν/ν)椰子水,20%(ν/ν)菠萝汁,500mL三角瓶装200mL发酵液(液高3.4 cm),初始pH4.5,150 r/min,30℃振荡培养10d.在此条件下,可得到粒形均匀(φ 0.8～1.0 cm)、产量较高(3.15 g/L)的球形细菌纤维素.这种新型纤维素球粒能满足食品工业和消费者多元化的需求.     

景德镇种植免耕稻草全程覆盖马铃薯的气象条件分析

通过对景德镇市与广西玉林市的气候条件比较，发现在免耕稻草全程覆盖马铃薯种植期间，景德镇市的气温条件没有玉林市好，但日照和降水条件较玉林市优越。根据马铃薯种植的气象条件要求和景德镇市气候条件，确定景德镇市免耕稻草全程覆盖马铃薯种植时期宜在9月上旬至12月上旬。     

影响螺旋藻生长因素的研究进展

螺旋藻具有丰富和全面的营养,同时具有重要的医疗保健价值,有着广阔的应用前景.笔者主要论述了不同的螺旋藻培养条件对其生长和产物的影响.     

对辽宁西部沙棘园营造技术的探讨

文章主要针对辽西地区沙棘园的建设,提出了沙棘园的营造技术环节及注意的问题,具体阐述了从选地、整地、土壤、种苗,栽植和管理等技术措施。     

小区绿化设计的理念、原则及造景

通过参考大量文献资料及深入实际调查分析研究，结合实例分析总结居住小区绿化设计中存在的几个常见的问题，提出小区绿化设计的理念、原则，并对小区绿化植物的选择与造景提出建议。     

上蔟环境影响桑蚕茧解舒的机理及提高蚕茧解舒率的研究

通过对上蔟环境与蚕茧解舒及茧丝质的关系、茧层丝胶的胶凝特性与胶粘功能的关系的系统研究，解明了上蔟环境蚕茧解舒的机理。通过提高蚕茧解舒率的农村生产试验，验证了蚕茧解舒理论，取得较大经济效益。     

放牧环境条件下育成公羊营养物质消化代谢的研究

本研究是在内蒙古白音锡勒种畜场自然放牧条件下进行的，按季节及自然气温分为四期，进行物质消化代谢及气体能量代谢试验，同时监测环境温度、湿度、风速及日照时数等气象指标。采用灰色关联度法分析探讨在放牧条件下，牧草营养因素和外界环境因素对育成公羊能量及营养物质代谢的影响。