不同药剂对苹果树腐烂病伤口愈合效果研究     

刘振中  陈瑞光  强锐  高华  赵政阳 《黑龙江农业科学》2015,(2):68-70

为探讨苹果腐烂病的有效防治方法,研究比较了春季休眠期和萌芽期用纯泥、多菌灵药泥、拂蓝克、人工树皮二代和愈合剂5种药剂处理对苹果树伤口愈合面积和形成愈伤组织鲜干重的影响。结果表明:休眠期形成的伤口愈合情况好于萌芽期形成的伤口;使用多菌灵药泥包裹处理伤口愈合面积、愈合比例最大,分别为7.05cm2和99.76%。愈伤组织鲜干重也最大,伤口愈合效果最好。建议春季在休眠期使用多菌灵药泥对苹果腐烂病进行伤口处理。  相似文献   

Vitamin C requirement of adult genetically improved farmed tilapia,Oreochromis niloticus     

Fan Wu  Feng Huang  Hua Wen  Ming Jiang  Wei Liu  Juan Tian  Chang Geng Yang 《Aquaculture International》2015,23(5):1203-1215

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计算机基础实践教学改革初探   总被引：1，自引：0，他引：1  

苏博妮  化希耀 《塔里木大学学报》2011,23(1):77-79

加强实践教学,培养学生创新能力是高等教育教学改革的一个重要组成部分。本文结合我校计算机基础实践教学现状,提出了建立分层次计算机基础实践教学体系的方案。该方案的顺利实施对我校计算机基础实践教学的改革具有一定的现实意义。  相似文献   

利用CRISPR/Cas9技术编辑DTH8基因改良水稻99-25的抽穗期     

张浩  柳絮  宣宁  张华  高瑞钰  赵倩倩  姚方印 《华北农学报》2020,35(6):58-66

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Whistle signal variations among three Indo-Pacific humpback dolphin populations in the South China Sea: a combined effect of the Qiongzhou Strait's geographical barrier function and local ambient noise?     

Jing YUAN  Zhitao WANG  Pengxiang DUAN  Yousheng XIAO  Hongke ZHANG  Zhixiong HUANG  Ruichun ZHOU  Hua WEN  Kexiong WANG  Ding WANG 《Integrative zoology》2021,16(4):499-511

Geographic variations in the dolphin whistles could be useful in assessing association and isolation among populations. Whistle of free-ranging Indo-Pacific humpback dolphins (Sousa chinensis) among the Pearl River Estuary (PRE), Leizhou Bei (LZB) and Sanniang Bay (SNB) populations were investigated. A total of 2850 whistles with legible fundamental contour were extracted and 15 acoustic parameters were measured. Contrary to SNB, PRE and LZB had the same relative proportion of tonal type compositions with flat and sine representing the most frequent types. The generalized linear model analysis showed significant acoustic difference among populations and tonal types. All frequency parameters in SNB were significantly higher than those in PRE and LZB, where no significant variation was observed in most of the parameters either at the population level or within each tonal type. Canonical discriminant functions analysis showed a smaller difference between PRE and LZB than between PRE and SNB and between LZB and SNB. Compared with previous recordings, recent recordings demonstrated a consistent pattern of becoming higher in whistle frequency parameters in both LZB and SNB populations, suggesting that noise pollution in LZB and SNB increasing with time according to the acoustic niche hypothesis. Dolphin whistle's geographic variations could be shaped by the combined function of the geographical barrier function of the Qiongzhou strait and local ambient noise. Considering the isolated condition and the relatively smaller population size of the humpback dolphin in the SNB, more effective and proactive conservation actions should be taken to prevent the extinction of small populations.  相似文献   

滇西北退耕还林后续政策分析及发展对策     

杨华 《林业调查规划》2014,39(5):115-118

滇西北是云南省最为贫困的少数民族聚集地区之一,实行退耕还林政策10多年来取得了巨大的成效,随着退耕还林政策补助陆续到期,部分退耕农户生计将出现困难。对退耕还林后续政策进行分析,认为退耕还林补偿标准与现有物价水平不符,套种的规定过于保守,针对政策上的不足与实施过程中存在的作业设计不够规范、监管不力、档案管理不够规范等问题提出相关对策和建议。  相似文献   

瘤胃上皮内的乳酸吸收及其转运载体蛋白研究进展     

范曜天  夏光亮  孙华  王洪荣 《动物营养学报》2020,(4):1570-1575

乳酸作为瘤胃内的中间代谢产物,其合理的清除与有效的利用在由高精料诱导的瘤胃酸中毒的研究中十分重要。现有研究表明,瘤胃上皮在乳酸吸收方面发挥着一定的作用,因此,本文从瘤胃上皮的乳酸吸收以及吸收过程中涉及的转运载体蛋白进行综述,为进一步了解乳酸在瘤胃内的转运过程提供理论依据。  相似文献   

白花蛇舌草超微粉对小鼠免疫功能的影响     

王航  汤承  岳华 《中国畜牧兽医》2014,41(3):166-169

The assay was aimed to study the effect of Hedyotis diffusa Willd superfines powder on immune function. Three groups of mice were gavaged with the drugs at doses of 1.75,1.25 and 0.75 g/kg once a day for 7 consecutive days, repectively. The mice of control group were administered with the same volume of saline.At the last time, mice were injected into the muscle with Newcastle disease vaccine,and get peripheral blood on days 7, 14 and 21 after the medicine administration. The enhancement of innate immune responses were evaluated by using CCK-8 method, hemagglutination inhibition test, macrophage phagocytic function test and organ coefficient method. The levels of lymphocytes proliferative capacity, serum antibody, peritoneal macrophage phagocytosis and the indexes of immune organs in mice were extremely significantly enhanced (P＜0.01). Hedyotis diffusa dWilld superfines powder could extremely significantly regulate the immunity function of mice (P＜0.01).  相似文献   

关于藏书倒架的研究与探讨——以中国矿业大学图书馆文昌科技图书阅览室为例     

张秀芳  郑建丽  周华 《农业图书情报学刊》2011,23(12):131-133

结合工作实际探讨藏书倒架的前期准备工作及倒架时的路线设计、人员组织安排和倒架后的环节完善。以期减轻图书馆人员在倒架工作中的劳动强度和工作量，提高工作效率。  相似文献   

金融危机对北京旅游业的影响分析     

唐承财  郭华  袁海红  邹统钎 《干旱区资源与环境》2016,(5):191-196

构建北京旅游本底趋势模型,从入境旅游、国内旅游两方面分析金融危机对北京旅游业的影响.研究表明:1)金融危机对北京入境游客规模与经济规模造成了严重的冲击,其中2008年与2009年的入境游客规模受到的影响最大(年客流损失率分别为15.91％与9.18％),2009年入境旅游经济规模的年收入损失率最大(8.35％),入境旅游客源空间2008年呈现萎缩状态,但2009年以后逐渐恢复.2)金融危机对北京国内旅游业的冲击和影响并不明显.3)受金融危机影响,2008年北京游客总量呈现明显下降趋势,损失客流量为1200万人次,至201 1年旅游人次开始回升;2008-2010年旅游经济规模受到金融危机的影响较小.  相似文献