Determination of Count and Uniformity Ratio of Shrimp by Machine Vision     

《Journal Of Aquatic Food Product Technology》2013,22(3):43-58

Current shrimp quality evaluation is a subjective sum of visual, smell and texture characteristics, and the manual determination of count and uniformity ratio of a sample batch. The automation of this process is desirable for a more rapidly and objectively repeatable evaluation. As a first step towards this goal, the count and uniformity ratio of whole, headless, peeled-tail-on, and peeled-tail-off tiger and white shrimp were evaluated by a machine vision procedure. The experimental weight and view area were correlated by three different equations (linear, power, and forced-power curves) to find the best correlation. The pixel intesities as it relates to lightness-darkness values were also correlated to see if different forms and species could be distinguished by this method. Data, equations and statistics for the correlations are presented.  相似文献   

富平关中奶山羊临床型乳房炎病原菌的分离鉴定     

李守杰  王桂英 《江西植保》2012,(2):188-190

为进一步探讨关中奶山羊乳房炎感染病原菌的情况,对富平县三个不同乡镇的79头患病奶山羊,共118份奶样进行分离鉴定,共分离出7种共126个菌株.其中大肠杆菌36株,占28.5%;金黄色葡萄球菌28株,占22.2%;绿脓杆菌23株,占18.3%;链球菌21株,占16.7%;变形杆菌8株,占6.3%;蜡样芽孢杆菌6株,占4.8%;酵母菌4株,占3.2%.认为该研究区域的关中奶山羊乳房炎主要是由大肠杆菌,金黄色葡萄球菌、绿脓杆菌、链球菌所致.  相似文献   

中华五角海星体腔液蛋白质分离技术初探     

黄荣莲  冼伟杰  王庆恒  杜晓东 《广东农业科学》2010,37(9):183-185

运用聚丙烯酰胺凝胶电泳方法分析中华五角海星体腔液蛋白组分,探究低丰度蛋白样品的初步分离鉴定方法。研究结果表明,中华五角海星体腔液部分蛋白含量处于凝胶电泳的最小检测浓度范围。通过简易样品浓缩处理、上样前样品处理及电泳缓冲液选择等条件优化,实现了对此类量少,低丰度样品良好的分离效果。  相似文献   

Effect of biocontrol agents and biofertilizers on root rot,yield, harvest index and nutrient uptake of cassava (Manihot esculanta Crantz)     

A.C. Hridya  Raj Sekhar Misra 《Archives of Agronomy and Soil Science》2013,59(9):1215-1227

Cassava is an important subsidiary food and industrial raw material in the tropics. Root rot disease, caused by Phytophthora palmivora, poses a serious threat to cassava cultivation in Tamil Nadu, India. Field experiments (2008–09) were conducted to study the effect of biocontrol agents (Trichoderma spp. and Pseudomonas fluorescens) and biofertilizers (Azospirillum, vesicular–arbuscular mycorrhizal fungi and phosphorus-solubilizing bacteria) on root rot, yield, harvest index and nutrient uptake of cassava at two NPK rates. The design of the experiment was a split plot with two NPK rates, recommended and 50% recommended rate, as the main plot treatments and five biocontrol agents and biofertilizers as subplot treatments. The results clearly indicated that use of a bioinoculants consortium significantly reduced root rot infection/disease incidence over uninoculated controls. Azospirillum significantly improved the yield of cassava at 50% of the recommended rate of NPK. NPK rates had no significant impact on harvest index of cassava and Trichoderma and vesicular–arbuscular mycorrhizal fungi resulted in a higher harvest index even at 50% of the recommended NPK rate. Nitrogen, phosphorus and potassium uptake was significantly improved when treated with biofertilizers and/or a consortium.  相似文献   

利用有益微生物菌调控池塘水质效果试验     

胡庆杰  于仕斌  李永刚  姜红  胡章荣  郑旭 《北京农业》2010,(18)

在高温季节,对高密度养殖池塘每10 d泼洒1次EM复合菌,施用量为每次600 g/(667 m2.m),使用后试验池水体中的氨氮、亚硝酸盐等有害物质及总磷、总氮含量显著下降,溶氧量增加。水质改善后,鱼类的体质增强、发病率下降,水质调控效果较显著。经测算,试验池养殖成本降低354.0元/667 m2,鱼病发生率降低32.2%,增产28.0 kg/667m2,7-9月平均节水1 036 t/667 m2。  相似文献   

整地方式对杂种落叶松生长的影响   总被引：1，自引：0，他引：1  

梁凤山  张博  李亚洲  孙楠  张怡春 《林业科技》2010,35(1):4-6

以4种整地方式下杂种落叶松试验林为研究对象,建立固定观测样地48块,连续观测地径、苗高和胸径生长,采用方差分析等研究方法,研究整地方式对杂种落叶松生长的影响,结果表明:杂种落叶松幼龄期间的地径及苗高生长,高台和穴状两种整地方式较好,另外两种整地方式差些;揭草皮方式在杂种落叶松幼龄时对其苗高生长及地径的作用不明显,但随着幼树的生长,效果越来越显著;在杂种落叶松11龄时,穴状与揭草皮两种整地方式下的平均胸径较大;杂种落叶松4种整地方式对生长的作用效果穴状揭草皮高台现整现造。  相似文献   

A multienzyme preparation enhances the utilization of nutrients and energy from pure corn and wheat diets in broilers     

《The Journal of Applied Poultry Research》2012,21(2):216-225

  相似文献   

Comparison of broiler live performance,carcass characteristics,and fatty acid composition of thigh meat when fed diets supplemented with neutralized sunflower soapstock or soybean oil     

《The Journal of Applied Poultry Research》2013,22(1):118-131

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2种玉米青贮饲料青贮过程中主要微生物的变化规律研究   总被引：3，自引：0，他引：3  

杨云贵  张越利  杜欣  刘桂要  曹社会 《畜牧兽医学报》2012,43(3):397-403

旨在研究玉米青贮过程中各主要微生物的数量变化及变化趋势.做去棒揉丝和带穗切段瓶制青贮,取青贮前玉米青贮原料及在装瓶后第0.5、1、2、3、4、5、6、7、9、11、13、15、20、25、30、35、40、45、50天的青贮样品,用无菌水浸泡,然后用选择性培养基培养其中的主要微生物,包括乳酸菌、酵母菌和霉菌,最后进行计数.结果表明,在玉米青贮密封后60 d内,水分含量变化很小.pH在第2天下降到4以下,然后稳定在3.5左右,带穗切段玉米青贮pH低于去棒揉丝玉米青贮.乳酸菌数量剧增,在第6、7天时达到最高峰,为109数量级,之后数量缓慢下降,于第15～20天时稳定在107数量级,去棒揉丝玉米青贮的乳酸菌数量在第7天达到最高峰,带穗切段玉米青贮则在第6天出现最高峰,其稍高于去棒揉丝玉米青贮.酵母菌在青贮初期数量有些波动,出现最高峰到达107数量级后数量随时间的延长而减少,去棒揉丝玉米青贮时酵母菌数量迅速下降,第40天后没有再检测到酵母菌的存在,而带穗切段玉米在青贮12 h之内数量迅速增加,之后缓慢下降,第50天后没有再检测到酵母菌的存在.霉菌因密封后氧气缺乏而数量很快减少,最晚在第11天左右便检测不到,去棒揉丝玉米青贮中霉菌数量下降较迅速,第4天之后便检测不到霉菌存在,而带穗切段玉米青贮则比较平缓,直到第11天之后便检测不到霉菌存在.综上所述,在玉米青贮过程中主要微生物随时间大致呈现逐步减少的趋势；对玉米秸秆进行纵切揉丝处理有利于玉米青贮饲料的制作.  相似文献   

GPIT生物制剂在露地番茄上的试验效果   总被引：7，自引：7，他引：0  

王纶  王星玉  温琪汾  元改香  王树红  王林梅 《山西农业科学》2014,42(9):971-976

为了验证GPIT生物制剂在露地番茄上的应用效果,以苗床喷灌、泥浆蘸根移栽、叶面喷施等方法在露地番茄上进行了试验。结果表明,在番茄成活率、产量因子、产量、品质和生物特性等方面,均出现了明显的变化,说明GPIT生物制剂对露地番茄产量的提高、品质的改善以及抗病、抗逆性的提高均有明显的效果。进一步证实,GPIT生物制剂在农业生产上的应用前景广阔。  相似文献