An Evaluation of Blueberry Cultivars Grown in Plastic Tunnels in Douglas County,Oregon

Abstract

Growing fruits and vegetables in plastic tunnels is known to accelerate maturity and protect quality. There are several studies on highbush blueberry (Vaccinium corymbosum) that demonstrate the ability of row covers to advance or delay crop maturity depending on how they are manipulated. Accelerating or delaying harvest time can prove to be very lucrative for producers. However, before producers start putting plastic tunnels over their crops it is important to know how blueberry cultivars will behave when grown under plastic. Six cultivars of southern highbush blueberry and eight cultivars of northern highbush blueberry were grown in a high hoop plastic tunnel for two seasons. Blueberry plants were grown under plastic from February 1 until their harvest was completed each year. After harvest, the plastic covering over the hoops was removed to help the blueberry plants develop fruit buds and meet winter chill requirements. On February 1 the plastic covering was returned to the high hoop tunnel after chilling requirements were met. As expected, fruit maturity dates were 1-3 weeks earlier for all the highbush blueberries grown inside the tunnel versus the same cultivars grown outside. The difference in maturity dates between cultivars grown under plastic and outside did change from one year to the next because of variation in the weather. Despite potential for poor pollination of blueberries in plastic tunnels, yields were significantly enhanced for four cultivars when grown under plastic tunnels. ‘Toro’, ‘Nui’, ‘Legacy’, and ‘Misty’ showed yield gains ranging from 1 to 4 times when grown under a plastic tunnel. Seed numbers per fruit were not significantly impacted by growing plants inside our tunnel.     

《中南林业调查规划》性质及学科分类

根据期刊性质和学科分类方法,以文献数量对《中南林业调查规划》进行分类,以明确其性质和学科归属。研究表明,《中南林业调查规划》2010年刊登的论文以学术性为主,林业类文献占当年文献总量的的56.52%,其余学科文献量较少,不能划入相应学科,因此应将该刊归类为林业类专业学术期刊。     

First record and redescription of the introduced sea anemone Sagartia ornata (Holdsworth, 1855) (Cnidaria: Actiniaria: Sagartiidae) from South Africa

The brooding sea anemone Sagartia ornata is reported from South Africa for the first time and is redescribed. The species is abundant intertidally in Langebaan Lagoon, where it attaches to stones shal lowly buried in sediment. It is probably a recent intro duction from Europe.     

中国门窗的发展

介绍了中国古代门窗和现代门窗的发展历程,阐明了各时期门窗的特点及发展状况;探讨了古代门窗形制的变化特点、现代门窗用材和制作工艺的发展历程。     

新隆优一号在皖南地区高产制种技术研究

介绍了宣城市的自然气候特征以及新隆优一号亲本特征与特性，分析了高产制种技术要点。     

《国家人权行动计划（2009～2010）》对实现“国家尊重和保障人权”宪法原则的意义

2009年4月13日,国务院新闻办公室发布了《国家人权行动计划（2009～2010）》。这是以我国政府名义制定的第一个以保障人权为主题的国家层面规划,是一份政府各部门落实＂国家尊重和保障人权＂的宪法原则,推进中国人权事业发展的行动纲领性质的政策文件。本文拟从介绍《国家人权行动计划（2009～2010）》的出台背景、指导思想、基本原则、主要内容等方面入手,分析该计划出台对实现＂国家尊重和保障人权＂宪法原则的意义。     

从农业科学角度分析燃料乙醇在我国的发展前景

燃料乙醇的生产原料直接来源于农业领域,同时它的发展又与绿色能源、可再生替代能源、农业可持续发展、农业循环经济、农业低碳经济等产生了联系,是农业资源利用学、农业生态学和农业经济学所研究的热门话题。从农业科学的角度对我国发展燃料乙醇的原因、现状、意义、存在问题以及解决对策等作了分析,认为燃料乙醇在我国发展前景光明。     

东北地区县域经济发展的意义、条件与制约因素分析

在对东北三省十三个县的县域经济发展状况进行实地调研的基础上，本文分析了东北地区发展县域经济的特殊意义、有利条件和制约因素，并且提出了增加用于基本农田建设的转移支付、改善金融服务、加强城乡协调的社会保障制度建设和深化行政审批和管理体制改革等一系列促进东北县域经济发展的重点政策措施。     

民国时期中华职业教育社乡村建设活动述论

20世纪20年代末30年代初,中国历史上形成了一次大规模的"乡村建设运动"。作为"足以代表这个运动的整个方面之较早者"——中华职业教育社"鉴于农村的衰落,与一般农业学校造就的人材,不合实际的需要,并且不能担当挽救农村衰落的重任,主张改变方向,把职业教育的范围扩大,深入到农村里去",(1)积极投入到乡村建设运动中,在长江三角洲地区展开了一系列的乡村建设活动。