Enumeration and speciation of coccidia affecting turkeys using flow cytometry method     

Taylor Boyett  Rocio Crespo  Valeria C. Vinueza  Carissa Gaghan  Javid P. Mohammed  Raveendra R. Kulkarni 《The Journal of Applied Poultry Research》2022,31(3):100270

  相似文献   

响沙成因问题探讨   总被引：1，自引：0，他引：1  

闫德仁  安晓亮  武智双 《内蒙古林业调查设计》2001,24(3):54-56

响沙是一种自然现象 ,而沙层水分状态是影响响沙成因的关键因素。文章提出响沙临界水分的概念和响沙成因的水分控制理论 ,同时对响沙的种种现象做出了合理的解释  相似文献   

论网络信息资源管理     

赵利凯  安国庆 《内蒙古林业调查设计》2005,28(Z1):130-131

文章在介绍网络信息资源含义和特点的基础上,从多层次对网络信息资源进行阐述。  相似文献   

内蒙古集通铁路防护林构建技术研究     

赵颖  安庆丰  郭永盛 《内蒙古林业科技》2004,(1):14-17

本项研究根据集通铁路所处的地理位置及所受沙灾、雪灾、风灾、水灾四大灾害的危害特点．以DK328 500～DK338 500为试验示范区，在调查分析当地自然条件的基础上．对沿线立地类型进行了科学的剖析和划分。针对铁路安全运输生产的要求，采用多种造林技术措施，乔灌草相结合，阻固造封并举．迅速恢复沿线林草植被。  相似文献   

橡胶树具有稳定重复性RAPD反应体系的建立   总被引：1，自引：0，他引：1  

陈根辉  黄华孙  安泽伟 《热带农业科技》2007,30(4):5-9

为增强橡胶树RAPD反应的稳定性,通过对影响PCR反应体系的几个主要因子进行组合研究,并分析了增效剂TMAC,BSA对PCR的影响,确定了各成分的最佳工作浓度,建立了稳定的橡胶树RAPD反应体系,为利用RAPD技术对橡胶树种质资源进行研究提供了可靠保证。  相似文献   

Growth responses, physiology and decay associated with pruning plantation-grown Eucalyptus globulus Labill. and E. nitens (Deane and Maiden) Maiden     

E.A. Pinkard  C. Mohammed  C.L. Beadle  M.F. Hall  D. Worledge  A. Mollon   《Forest Ecology and Management》2004,200(1-3):263-277

Detailed studies have been undertaken to define pruning regimes for Eucalyptus nitens, but little is known of E. globulus responses to pruning although this is a more commonly planted species. This paper describes experiments that aimed to identify (a) levels of pruning that reduce E. globulus growth, (b) physiological processes contributing to those growth responses, (c) the incidence of decay and factors influencing decay incidence following pruning of E. globulus, and (d) comparative responses of E. nitens and E. globulus to live branch pruning. Results of a field experiment indicated that removal of between 30 and 50% of the crown length was appropriate for E. globulus plantations verging on canopy closure. The significant reduction in height growth associated with removal of 50 or 70% of crown length suggested pruning should remain below 50% of crown length if reduced stem growth of pruned trees was to be avoided. Stem volume was only significantly reduced over the period of the experiment by 70% pruning, but it was estimated that standing volume following removal of 50% of crown length would be reduced by 82 m³ ha⁻¹ over a 20-year rotation if there were no other silvicultural interventions. The growth responses observed were probably related to large reductions in leaf area following 50 or 70% removal of crown length. Trees responded to pruning by changing patterns of biomass partitioning to favour stem growth at the expense of branch growth. A glasshouse study determined that light-saturated net CO₂ uptake (A_max) increased following pruning. E. nitens seedlings had both a higher baseline A_max and higher A_max following pruning than did E. globulus, which could partially explain the greater effect of pruning on E. globulus growth than has been observed for E. nitens in other studies. This result, as well as apparently different patterns of foliage distribution through the crowns of E. globulus and E. nitens, suggested that models of pruning responses need to be parameterised for both species. In addition, a more conservative pruning regime may be appropriate for E. globulus than E. nitens. Pruning increased the frequency of branch traces with decay infection, and there was a trend towards increasing decay outbreaks with increasing pruning severity. Decay outbreaks were more likely to occur following pruning of high angle or larger diameter branches.  相似文献   

雨豆树播种前预处理对种子发芽和种苗发育的影响     

Mohammed Alamgir  M. K. Hossain 《林业研究》2005,16(3)

播种前对雨豆树(Albizia saman (Jacq.) F. Muell.)的种子进行了5 种预先处理,研究种子预先处理对种子发芽和苗圃种苗发育的影响。实验是在孟加拉吉大港大学林业与环境研究所的苗圃进行。研究结果表明,在种子末端修剪(处理4)提高种子发芽率50%,在冷水中浸泡24 小时(处理1)提高种子发芽率42%,在开水中浸30 秒后再在冷水中浸泡24 小时(处理2),种子发芽完全被抑制。处理4 和处理1 的种子发芽率、种苗初期形态生长和生物量都明显高于对照组。因此,这2 种播种前的种子预处理方法,可用于提高雨豆树种子发芽率和促进早期壮苗生长。图2 表3 参30。  相似文献   

常山胡柚叶片DNA的抽提与分析     

仲山民  胡芳名  谭晓凤  郑勇平  何照斌  杜红亮 《江苏林业科技》2003,30(1):5-8

经反复实验，采用在抽提前加入一定量的抗氧化剂β－巯基乙醇，用冰冻的异丙醇来沉淀DNA，并增加氯仿／异戊醇抽提次数的所谓改良CTAB法，对常山胡柚叶片DNA抽提与分析，不仅成功提取到常山胡柚叶片DNA，而且所得的DNA浓度高、纯度好，20个试样的DNA苹均质量浓度为272.86μg/mL，平均每克鲜叶片可获DNA约82μg，纯度基本上都在1.4-1.8范围内，并经RAPD反应验证，完全能满足常规分子生物学分析的要求。  相似文献   

茶叶灰分和水分与品质关系   总被引：3，自引：0，他引：3  

刘本英  周红杰  王平盛  安文杰 《热带农业科技》2007,30(3):22-26

阐述了茶叶灰分及其检验意义和世界茶叶标准中的灰分指标,分析了我国茶叶灰分检验现状和影响茶叶灰分的主要因素,提出了有效控制茶叶灰分的4项措施;同时从营养化学的角度分析了水分对茶叶中微生物的生长繁殖、茶化反应、营养成分及风味物等方面的直接影响,低水分活度对茶叶品质起到的稳定作用。  相似文献   

武威绿洲温室果树主栽品种需冷量测定及其应用研究   总被引：2，自引：0，他引：2  

牟德生  朱发英  罗祥  李万年  安玉萍 《甘肃林业科技》2007,32(4):13-16

通过定位定时采样,采用水培枝条法和武威绿洲12年来稳定通过≤7.2℃气温的平均初始日期,测算出8个温室葡萄主栽品种,3个温室油桃主栽品种,3个温室杏主栽品种的需冷量,为武威绿洲的温室果树栽培确定揭帘升温时间提供了科学依据。  相似文献