CHE饲料发酵过程中氨基酸及还原糖变化的在线检测

为了有效检测饲料复合酶制剂产品中的必需氨基酸含量。对CHE饲料中赖氨酸、色氨酸、脯氨酸和还原糖进行了提取和测定,结果表明,在CHE饲料发酵前后,样品赖氨酸含量最高值1.82 μg/g,色氨酸含量最高值309.26 μg/g,脯氨酸含量为428.61 μg/g;并且发酵后期还原糖含量最终稳定在3.03%左右;并将CHE饲料的发酵周期优化至108 h,此时必需氨基酸含量最高,还原糖含量稳定,有利于家畜的营养吸收。     

投饵与不投饵稻田养殖‘福瑞鲤’经济效益分析

为了比较分析投饵与不投饵养殖模式对稻田养殖‘福瑞鲤’的生长情况,评估分析养殖经济效益。笔者在福建省武夷山地区开展了稻田不投饵养殖‘福瑞鲤’和不同放养密度投饵养殖‘福瑞鲤’试验。结果显示:经过74天养殖,投饵组2号、3号的平均日均增重量、平均瞬时增重率、平均体重分别是不投饵组1号的2.96和2.31倍,2.67和2.14倍,1.52、1.44倍;不同放养密度投喂组间‘福瑞鲤’生长速度和平均规格差异不显著(P>0.05),但单位产量差异较大。在试验条件下,不投饵组1号平均单位利润达到2.12元/kg,分别是投饵组2号、3号的1.1和1.23倍;售价差异导致投饵与不投饵养殖模式稻田养殖‘福瑞鲤’的总利润无明显差异。因此,在一定渔获量、售价差异显著的前提下,稻田养殖‘福瑞鲤’无需开展投饵养殖方式;在投饵条件下,适当提高‘福瑞鲤’鱼种的放养密度,则有助于单位产量和经济效益的提高。     

CHE饲料发酵过程中蛋白酶活力的在线监测

蛋白酶（包括酸性蛋白酶、碱性蛋白酶及中性蛋白酶）是饲料复合酶制剂中最主要的酶之一。本文对CHE饲料中的酸性蛋白酶、碱性蛋白酶、中性蛋白酶进行了提取并进行了活性测定。结果表明各个酶的活性并不相同,其中酸性蛋白酶的活性最大,碱性蛋白酶最小,并且酸性蛋白的最适温度是40℃左右活性,最大值为5.203ug/min,中性蛋白酶的最适温度是30℃左右性,最大值为2.9754 ug/min,而碱性蛋白酶的最适温度是22℃左右性,最大值为0.4482 ug/min。     

CHE饲料发酵过程中淀粉酶活力的在线监测

淀粉酶（包括α-淀粉酶和β-淀粉酶）是饲料复合酶制剂中最主要的酶之一。本文对CHE饲料中的α-淀粉酶及淀粉酶全酶进行了提取并进行了活性测定。结果表明α-淀粉酶和β-淀粉酶的最适温度分别为52℃和45℃。α-淀粉酶酶活力最大为5.6352ug/min, β-淀粉酶酶活力最大为1.0931ug/min。     

A Decision-Making Framework Model of Tool Selection for Green Manufacturing and Its Applications

Pursuing the green manufacturing of products is beneficial to the alleviation of environment burdens. In order to reap such benefits, green manufacturing is involved in every aspect of manufacturing processes.The optimization selection of tool is one of the important approach to improve environmentally performance of cutting machining. The objective factors of decision making problems for traditional tool selection are usually the following, quality and cost.Based on the main idea of environmentally conscious and decision making framework model of green manufacturing proposed by the authors, an multi object decision making model for tool selection is put forward. The objects includes Time(T),Quality (Q),Cost(C), Resources(R) and Environment impact(E), where T aims to minimize the produce time,Q means to maximize the quality,C means to minimize the cost, R means to minimize the consume the resources and E means to minimize the environment impact respectively. Each object is analyzed in detail and integrated the Fuzzy Clustering Analysis Algorithm together with the expert judging method apply to the model too. A case study in which a practical decision making problem for tool selection in green manufacturing machining is analyzed. Successful application of above model shows the model is practical .     

Variability and relationships among 12-hour IVDMD, starch, oil, protein, and physical characteristics of 16 sorghum conversion lines

A factor frequently identified as a key to understanding sorghum [Sorghum bicolor (L.) Moench feed value to ruminant animals is rate of starch digestion. Recent research in corn (Zea mays L.) has established a strong ability to predict rumen starch degradation from grain physical and chemical parameters. It was therefore important to determine whether similar relationships could be established in sorghum. The objectives of this study were to determine: 1) range of variation for12-hour in vitro dry matter disappearance (IVDMD), chemical, and physical grain quality parameters among 16sorghum conversion lines; and 2) to establish the strength of the relationships of these characters. Entries were grown at Ithaca, Nebraska in 1991 and 1992 in a randomized complete block with four replications. Line effects were significant for 12-hour IVMVD, crude protein, oil, starch, individual seed weight, and hardness. The only traits significantly correlated with 12-hour IVDMD were crude protein and hardness, with r≤–0.32 for testa and non-testa-containing lines. Stepwise regression similarly revealed poor predictive ability for any of the traits on12-hour IVDMD. Unlike corn, prediction of digestibility from simply measured physical parameters was not possible in this set of16 sorghum lines. However, the lack of strong relationships provides opportunity to select lines with unique combinations of traits for individual targeted needs or markets. This revised version was published online in July 2006 with corrections to the Cover Date.     

农业机械产品的绿色制造

分析了传统农业制造业及其使用行业造成的环境污染问题，提出农业机械产品采用绿色设计与制造的途径，指出绿色制造是农业机械制造业实施可持续发展战略、解决环境污染问题、实现新的经济增长的必由之路．     

农业机械制造自动化的应用

随着社会经济的不断发展,机械制造自动化技术发挥着越来越重要的作用.在全球经济一体化趋势不断加快的大环境背景下,农产品市场得到更大范围地拓宽,现有的农业生产率无法适应人们的需求,农业机械制造自动化的生产发展趋势显得刻不容缓.本文将基于农业机械制造自动化的现状,指出农业机械制造自动化应用的优势,提出如何提高农业机械制造自动化的应用措施.     

黑莓鲈苗种土池生态培育及人工驯食技术研究

为探讨黑莓鲈生态育苗技术,采用了仔稚鱼土池生态培育与室内水泥池的育苗方式,进行了黑莓鲈人工育苗试验。结果显示,土池通过肥水培养饵料生物,添加外源饵料生物,放养黑莓鲈仔鱼76.5万尾/hm~2,经过50天的培育,共培育出平均全长3.37 cm的鱼苗31.4万尾,平均成活率为62.36%,仔鱼开口饵料以轮虫、枝角类为主,其体长(L_T)与日龄(T)的回归方程为:L_T=0.006T2+0.251T+2.875(R2=0.995);幼鱼全长30 mm时开始驯食,以水蚯蚓作为驯食先导饵料,配合饲料驯食成功率达99%~100%,平均驯食成活率93.87%。土池生态育苗,水质稳定,饵料生物种群数量丰富,可以提高黑莓鲈育苗成活率,获得稳定的育苗效果。     

机械制造与自动化应用的探究

为了研究机械制造与自动化应用,文章首先从管理、设计、自动化技术以及制造工艺四个方面介绍了我国机械制造与自动化应用的现状。最后介绍了机械自动化技术的应用。