应用营养调控技术保护奶牛养殖环境的措施     

康永刚  吕颜枝  廖云琼 《贵州畜牧兽医》2015,39(2):29-30

随着奶牛集约化程度的提高,奶牛粪便中氮、磷的排放也逐渐增加,减少奶牛粪便氮、磷排放已成为奶牛生产研究的热点问题。文章从奶牛营养调控技术阐述了降低奶牛粪便中氮、磷排放的调控措施,为减少奶牛氮、磷的排放,保护养殖环境提供可行方法。  相似文献   

Identification,characterization and functional analysis of anti-apoptotic protein BCL-2-like gene from pufferfish,Takifugu obscurus,responding to bacterial challenge     

Chang-Hong Cheng  Fang-Fang Yang  Shao-An Liao  Yu-Tao Miao  Chao-Xia Ye  An-Li Wang  Jin-Chang Liu  Li-Wei Liu 《Fish physiology and biochemistry》2015,41(4):1053-1064

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梨树栽培管理关键技术     

吴艳  廖建江 《绿色科技》2011,(4)

指出了梨树具有高度的营养价值、经济价值、生态价值,从林地的选择、林地整地、苗木栽植、树园管理、树形期修剪、果实采收贮运及梨树栽培管理技术等方面提出了关键技术实施要点,并对梨树的发展前景做出了评估.  相似文献   

厦门市忠仑公园药用植物园规划设计初步探析     

穆颖  廖启炓 《林业科技情报》2020,52(1):91-94

随着景观改造的多样性,药用植物园也成为城市园林营造景观的一种方式。厦门市忠仑公园集科普、教育、观赏功能为一体,药用植物园区景观改造以人为本,以科普教育为宗旨,在保证药用植物景观的基本功能的前提下,塑造优美的景观,既能弘扬中华民族药用文化知识,又能为周边居民提供一个互动学习科普知识、修养身心的场所。  相似文献   

浅析我国农业节水灌溉技术研究及进展     

廖佐毅  张庐陵  廖章一  邓勇杰 《南方农机》2021,(7):84-86

中国是世界上人均水资源占有量最贫乏的13个国家之一,水是农业的命脉,水资源的严重不足,使我国农业发展面临非常大的挑战。发展节水灌溉技术是我国未来农业发展的一项重大战略决策,也是坚持绿色发展理念的必然选择。为了解我国农业节水灌溉技术现状和研究进展,本文通过综合分析国内外节水灌溉技术现状,梳理我国目前主要的节水灌溉工程技术,总结我国在农业节水灌溉技术现阶段面临的主要问题和未来发展趋势。  相似文献   

应用Excel软件分析敌敌畏农药对两广二号家蚕的安全间隔期     

韦秉兴  廖耀民  冯健玲  廖丽珍  唐正怡  韩世健  宋桂荣  潘功亮 《广西蚕业》2011,(3):27-33

应用Excel软件中的曲线方程分析判断敌敌畏农药对两广二号家蚕的安全间隔期。结果表明：敌敌畏1000倍液的安全间隔期是6d多，其数学模型为幂函数曲线方：y=88．0653x-1834本方法克服以往家蚕的农药安全期无数学模型可循或使用的BASIC方法陈旧繁杂的缺点，也避免英文统计软件SPSS难以在农村普及的不足，是一种计...  相似文献   

Optimum Level of Dietary n‐3 Highly Unsaturated Fatty Acids for Juvenile Sea Cucumber,Apostichopus japonicus          下载免费PDF全文

Mingling Liao  Tongjun Ren  Wei Chen  Zhiqiang Jiang  Huan Yang  Yuzhe Han 《Journal of the World Aquaculture Society》2015,46(6):642-649

A feeding trial was conducted to estimate the optimum level of dietary n‐3 highly unsaturated fatty acids (HUFAs) for juvenile sea cucumber, Apostichopus japonicas, based on growth performance and fatty acid compositions. Diets with five n‐3 HUFAs levels (0.15, 0.22, 0.33, 0.38, and 0.46%) were fed to sea cucumber juveniles (1.97 ± 0.01 g) once a day for 60 d. The sea cucumbers fed diets containing 0.22% n‐3 HUFAs showed significantly (P < 0.05) higher body weight gain, feed efficiency, and protein efficiency ratio than the sea cucumbers fed diets containing 0.15% n‐3 HUFAs, but not significantly different (P > 0.05) from those of sea cucumbers fed diets containing 0.33, 0.38, and 0.46% n‐3 HUFAs. The sea cucumbers fed diets containing 0.46% n‐3 HUFAs showed significantly (P < 0.05) higher eicosapentaenoic acid and saturated fatty acid than the sea cucumber fed diets containing 0.15% n‐3 HUFAs, but not significantly different (P > 0.05) from those of sea cucumbers fed diets containing 0.22, 0.33, and 0.38% n‐3 HUFAs. The results of growth performance and n‐3 HUFA compositions of body wall indicated that the optimum level of dietary n‐3 HUFAs for juvenile sea cucumber is between 0.22 and 0.46%.  相似文献   

Effect of ammonia and nitrite on vigour,survival rate,moulting rate of the blue swimming crab <Emphasis Type="Italic">Portunus pelagicus</Emphasis> zoea     

Yong Yang Liao  Hong Hu Wang  Zhi Gan Lin 《Aquaculture International》2011,19(2):339-350

The effects of ammonia and nitrite on vigour, survival rate, moulting rate of zoea of blue swimming crab, Portunus pelagicus, were studied. A total of five nitrite-N treatments (26.67, 53.34, 106.68, 213.36, 426.72 mg/l) and a control (no nitrite-N added) were set up for the acute nitrite-N toxicity experiment; a total of five ammonia-N treatments (8.43, 16.86, 33.72, 67.44, 134.88 mg/l) and a control (no ammonia-N added) were set up for the acute ammonia-N toxicity experiment. The results showed that the vigour, survival rate and moulting rate of zoea of the blue swimming crabs exposed to over 53.34 mg/l were significantly different (P < 0.05) from the control group. The zoea LC₅₀ values (mg/l) of nitrite-N were 179.47, 76.56, 66.70, 37.49, 25.01, 25.35, 25.34 mg/l for 24, 36, 48, 60, 72, 84, 96 h, respectively. The vigour, survival rate and moulting rate of zoea of the blue swimming crabs exposed to over 16.86 mg/l were significantly different (P < 0.05) from the control group. The zoea LC₅₀ values (mg/l) of ammonia-N were 51.04, 39.62, 38.72, 24.43, 16.90, 13.42, 11.16 mg/l for 24, 36, 48, 60, 72, 84, 96 h, respectively. The zoeae are highly sensitive to ammonia and nitrite, and the toxicity of ammonia and nitrite on Portunus pelagicus decrease with development of this crab.  相似文献   

运用软件限制策略提高Windows域的安全性     

柴方艳 《农业网络信息》2010,(1):88-89,95

运用Windows Server 2003组策略中的软件限制策略是系统内置功能,可以保护计算机环境。软件限制策略使用"散列规则"、"证书规则"、"路径规则"、"Internet区域规则"建立安全的软件运行环境,避免受到不可信代码的攻击,提高域的安全性。  相似文献   

鹦哥岭自然保护区海南锯腿树蛙种群分布以及繁殖生物学研究     

廖常乐 《热带林业》2013,(3):4-6

2011年2月~2012年7月,对海南鹦哥岭自然保护区内的海南锯腿树蛙(Rhacophorus hainanus)种群分布进行了调查,用野外观察与室内饲养的方法对其繁殖生物学进行了初步研究。结果表明:海南锯腿树蛙分布在鹦哥岭自然保护区内海拔800m以上的溪流边或是季节性水潭附近;该蛙具有明显的性二型特点;繁殖季节为每年的3月至6月,繁殖地为季节性水潭,繁殖包括鸣叫求偶、抱对、产卵三个过程,每次产卵量为126±77枚,蛙卵约7d孵化为蝌蚪,57d蝌蚪变态成为幼蛙。该蛙唇齿式为I:4+4/1+1:II,与云南部分蝌蚪标本以及越南采集的蝌蚪标本有差异。  相似文献