规模化羊场羊舍夏季环境与小尾寒羊的行为观察   总被引：3，自引：2，他引：1  

臧强  李保明  施正香  赵亚军  韩晶 《农业工程学报》2005,21(9):183-185

如何建立与完善舍饲养羊工艺模式,以满足羊只生物学特点和行为学特性的要求,正受到越来越多的关注。该文在对规模化舍饲养羊场的羊舍环境进行测试分析的基础上,对小尾寒羊的行为表现进行了连续2周的观察。结果表明,舍饲环境下小尾寒羊的行为谱主要由采食、反刍、休息和运动4个行为变量构成,处于不同生育阶段的小尾寒羊之间行为存在着一定的差异。躺卧是小尾寒羊的一种基本行为,环境温度对羊只的躺卧区域选择及躺卧姿势有很大影响。在集约化舍饲环境下,虽然可以为羊只提供较为理想的羊舍小气候环境,但因饲养环境单调,空间狭小,羊只的某些固有行为得不到正常表达。  相似文献   

哺乳期犊牛小群饲养模式的相关研究进展     

王旭  马翀 《中国奶牛》2021,(2):1-4

犊牛小群饲养和自动饲喂系统因能够显著提高犊牛福利和大幅降低劳动力成本的优势正在受到越来越多国内外牧场的青睐.本文总结了关于犊牛小群饲养模式的相关研究进展,并针对小群饲养模式对犊牛健康、生长发育及行为学等方面的影响进行了概括,以供牧场在生产实践中参考使用.  相似文献   

人工促进栽培措施对小佛肚竹秆形变异的影响研究          下载免费PDF全文

陈双林  杨清平  郭子武 《林业科学研究》2008,21(1):118-121

小佛肚竹(Bambusa ventricosa McClure)隶属箣竹属(Bambusa)箣竹亚属(Subgen.Bambusa),合轴丛生型,为我国著名的观赏竹种,自然分布于福建、广东、广西,现全国各地乃至世界多国有引种[1],具两种秆形--畸形秆和正常秆,畸形秆常用于植物盆景制作和庭院观赏栽培.  相似文献   

Reframing well-being: Lessons from Aotearoa New Zealand's first wave COVID-19 response     

Dean C. Stronge  Alison Greenaway  Robyn L. Kannemeyer  Chris Howard 《Asia Pacific viewpoint》2023,64(2):239-254

Well-being is increasingly being promoted and used to describe social progress. However, tension exists between framings that focus on enhancing individual well-being (living well) and societal or collective framings of well-being (living well together). Well-being is central to Aotearoa New Zealand's COVID-19 response and recovery. The COVID-19 pandemic reopened debates about what kind of society people want to live in. Our research explored the ‘shared typical’ or commonality of experiences of the first wave of COVID-19 response in Aotearoa New Zealand. Semi-structured interviews provided insights into a wide range of concerns participants faced and what that meant for their well-being and the well-being of Aotearoa New Zealand. We found that well-being is both multidimensional and hierarchical, and while people talked about their own well-being, it was often in the context of broader social well-being. These findings support research showing that well-being is relational. We suggest that Indigenous models of well-being are well placed to inform policy strategies enabling holistic well-being, but this needs to be done in ways that pair Indigenous and Western knowledge, rather than integrating or assimilating this knowledge into Western science approaches.  相似文献   

环境因素对稀有鮈鲫个性行为的影响     

段鑫越  彭士涛  郑天立  邱宁 《水生态学杂志》2024,45(3):131-137

鱼类个性行为反映其生活史策略,研究环境因素对鱼类个性行为的影响,可为更好地理解该行为的适应性意义及优化鱼类养殖环境提供理论依据和数据基础。以稀有鮈鲫（Gobiocypris rarus）为研究对象,使用隔板跨越和遮蔽物出游2 种实验方法,观测了同类鱼群刺激、禁食及不同环境照度下稀有鮈鲫的个性行为。结果显示,隔板跨越测试中,稀有鮈鲫开始运动前的潜伏期在同类鱼群存在与否的情况下没有显著差异（P>0.05）,但在禁食后显著减小（P<0.05）,在不同照度下差异显著（P<0.05）,且随照度的增加而增大;稀有鮈鲫总跨越隔板数在不同的照度条件下差异极显著（P<0.01）,随照度的增加而减小,但在同类鱼群存在与否及禁食组与饱食组之间差异均不显著（P>0.05）。遮蔽物出游测试中,稀有鮈鲫游出遮蔽物的时间在24 h 禁食后变化不显著（P>0.05）,但在同类鱼群出现时差异显著（P<0.05）,不同照度条件下差异极显著（P<0.01）,且随照度的增加先减小再增大。研究表明,禁食导致的饥饿和同类鱼群的出现能够在一定程度上增强稀有鮈鲫的探索性,但环境照度是稀有鮈鲫个性行为最为关键的影响因子。  相似文献   

Maintenance ration, protein synthesis capacity, plasma insulin and growth of Atlantic salmon (Salmo salar L.) with genetically different trypsin isozymes     

K. Rungruangsak-Torrissen  C.G. Carter  A. Sundby  A. Berg  D.F. Houlihan 《Fish physiology and biochemistry》1999,21(3):223-233

Growth was found to be associated with the changes of trypsin activity in the pyloric caecal tissues and the level of plasma insulin in Atlantic salmon (Salmo salar L.). A decrease in trypsin activity accompanied by an increase in plasma insulin was detected one month before an enhanced growth was observed. There were significant relationships between weight specific consumption rate, plasma insulin levels and fish growth. The correlation of weight specific consumption rate was higher with growth rate (R²=0.7, p<0.0001) than with plasma insulin concentration (R²=0.4, p<0.0001).When the comparison was made between Atlantic salmon carrying and lacking the trypsin variant TRP-2*92, the fish with the variant had lower maintenance ration (p<0.05), higher capacity for protein synthesis in the white muscle (p<0.02), and a greater ability to utilize the feed at a restricted ration than the fish without the variant. In Atlantic salmon lacking the variant, both plasma insulin concentrations and growth rates were significantly lower (p<0.05) in the fish fed 0.5% bw day^–1 than those fed 1% bw day^–1. Whilst the growth rates of TRP-2*92 salmon fed the different rations became similar one month after similar levels of plasma insulin were observed between them. The TRP-2*92 salmon may be defined as a high protein growth efficiency fish with low protein turnover rate.Genetic variation in trypsin isozyme pattern affects feed utilization, plasma insulin levels and growth in Atlantic salmon.  相似文献   

Glycoalkaloid accumulation during tuber development of early potato cultivars     

F. Papathanasiou  S. H. Mitchell  Barbara M. R. Harvey 《Potato Research》1998,41(2):117-125

Summary Plants of early potato cultivars were sampled at successive harvests during tuber development and individual tubers were analysed for α-solanine and α-chaconine using high-performance liquid chromatography. Mean tuber total glycoalkaloid concentration (α-solanine plus α-chaconine) per plant decreased with time and statistically significant differences between cultivars were observed in the patterns of decline during tuber growth. The mean tuber ratio of α-chaconine to α-solanine increased during tuber development and was also affected by genotype. Total glycoalkaloid concentration for individual tubers of marketable sizes (up to 50 g fresh weight) exceeded the safety limit of 20 mg per 100 g fresh weight for cultivars Home Guard and British Queen but not for Rocket. These differences were attributable to differences in both rates and patterns of glycoalkaloid accumulation during tuber development, although in all cultivars results were consistent with glycoalkaloid accumulation occurring in the expanding peripheral cell layers of tubers for a considerable period after tuber initiation.  相似文献   

The Causes of the Difference between Supply and Demand in the Housing Market of China and Solutio ns to the Problem     

LING Chuan-rong  SHI Qian 《保鲜与加工》2000,(3):77

The reason for the difference between supply and demand of houses is that there is a non equilibrium in the interests of purchaser, developer and the government. In order to solve this problem, the developer should cut down the cost, the purchaser should clarify the house value and the government should build up a house property evaluation system to improve the housing market.  相似文献   

绿竹林丰产结构研究   总被引：15，自引：3，他引：12  

董建文 《福建林学院学报》2000,20(2):101-104

对不同年龄组成的绿竹丛产笋量对比、丛立竹数和该丛当年笋产量的回归关系、以及绿竹丛立竹数 ( N)与丛冠幅 ( CW)的回归分析 ,结果表明 ,不同年龄组成的绿竹丛平均单株产笋量差异显著 ,由 1、 2年生竹组成的绿竹丛平均单株产笋分别比由 1～ 3年生竹组成的绿竹丛和 1～ 4年生竹组成的绿竹丛多 0 .1 638kg和 0 .1 979kg.丛立竹数为 4～ 7(株 /丛 )的绿竹林 ,在相应最大密度下可获得最大笋产量 (笋产量大于 4650 kg/hm2 ) .研究结果提出了绿竹林丰产结构指标 ,可为绿竹丰产培育提供指导  相似文献   

A Study on Evaluation of Economy of Commodity Housing     

REN Hong  ZHU Xi sheng CAO Yao jin 《保鲜与加工》2000,(2):1-6

The housing industry, as a new economy growth point and hot point of consumption in our national economy, has huge potentials for its development. Because of the underdevelopment of the commodity housing market in our country, there are some unhealthy tendencies, such as low level of development, poor quality of housing, waste of resources, large deviation between housing function and its price, and so on. So there is urgent need to take measures for avoiding these unhealthy phenomena. It is one of the strongest measures to evaluate the economy of the commodity housing. In this paper the meaning, principle and method of the evaluation on economy of the commodity housing were discussed. It will play a positive role to promote spreading this work.  相似文献