优良品种宁酥、宁丰大苹果在通辽安家落户

优良品种宁酥、宁丰大苹果在通辽安家落户一、抗寒性表现、１９９１年春采用劈接法高接，当年抽生的枝条于１９９２年春发现，在同园同期高接的东光条有轻度抽干的情况下，宁酥和宁丰条也有抽干现象，抽干程度宁酥轻于宁丰。１９９３、１９９４两年的早春却均未见有宁酥、...     

宁酥苹果引种简报

宁酥苹果引种简报武景和（辽宁省铁岭农业学校１１２００１）为丰富辽北苹果品种组成，我校于１９９０年春从沈阳农业大学园艺系引进优质抗寒大苹果宁酥接穗，用硬枝劈接法分别高接在东光、金红和秋红上。高接母株树为６年生，砧木为山定子，株行距４×５ｍ，计高接７株２...     

老梨树生产管理的几个问题

正1更换品种快不少梨农把效益差的原因归结为品种不对路,部分梨农选择把老梨树高接换头,早些年高接黄冠、红香酥等,现在又换成新梨七号、玉露香、秋月等,甚至有的换了好几茬了,生生把生产园变成了"试验园"。俗话说物以稀为贵,新品种多了大概也得便宜,最后     

梨树高接换头技术总结

梨树高接换头技术总结李振华，穆清沛，段树全（葫芦岛市连山区钢屯镇果树站１２５００９）为了发展梨的优新品种，我镇从１９９３年春开始，到１９９５年春对重点梨产村的低劣品种（秋子、安梨等）梨树进行了高接优良品种（锦丰、南果梨等）工作。高接树第２年开始结果，...     

宫内伊予柑高接换种树结果量调节对产量和品质的影响

宫内伊予柑高接换种树结果量调节对产量和品质的影响周今华（浙江省科学院柑桔研究所黄岩３１８０２０）柑桔高接换种是加速柑桔品种结构调整，改造低产桔园的重要手段，可在较短时期内更新品种、恢复树势，达到多收良果的目的。柑桔高接后的管理，第１～２年主要是确保叶...     

天草桔橙引种表现及栽培技术

天草桔橙是优良的杂柑新品种，果实扁球形，果面橙红靓丽，果肉柔软多汁，风味酸甜适口，受到广大消费者的青睐。沙县2001年从浙江引种200株，高接130株；2002年再引种5000株，高接2000株。定植树第三年结果，平均株产3．2kg；高接树第二年结果，第三年平均株产20．3kg。至2004年已产果1万多公斤，试销价格高出普通柑桔的3—4倍，发展势头良好。     

新梨七号引种及丰产栽培技术

梨早熟新品种新梨七号是新疆阿拉尔塔里木农垦大学植物科技学院 1 985年用库尔勒香梨作母本 ,早酥作父本经有性杂交育成。 2 0 0 0年新疆阿克苏地区从阿拉尔塔里木农垦大学引入新梨七号接穗高接在 8年生砀山酥梨树上 ,进行引种观察和丰产栽培试验。经试验观察 ,该品种在阿克苏地区表现果个大 ,风味甜浓 ,芳香诱人 ,品质佳 ,是优良的早熟品种。该项试验高接后第 2年开始结果 ,平均株产 6 3kg ,第 3年 6 6 7m2 产量达 5 5 5 6kg。现将试验结果及配套技术措施简介如下。1　试验园基本情况试验园设在新疆阿克苏地区林科所丰产试验园。阿克苏地…     

密植梨树高接换种速生丰产技术

为了搞好结构调整，2002年我们将沧州市绿州果品公司的14公顷梨园，高接成新品种高标准示范果园，通过高标准管理，取得了当年恢复树冠，第2年丰产的良好效果，现将示范工作总结如下：     

日本苹果高接更新技术

在日本苹果价格很高,特别是优质新品种销售价可比一般品种高2—3倍,所以迅速更新品种是增加果农收入的主要手段,而高接更新又是投资少、见效快的有效方法。(一)高接更新的种类1.一次更新:将一株盛果期的大树,一次高接60—150个枝条。把所有能嫁接的部位全部高接新品种,第二年即可少量开花结果,第三年可收益。由于此种方法几乎有两     

梨树多头高接换科技术

梨是文成县南田镇、十源乡、二源乡的主栽果树，并有悠久的栽培历史，但由于过去多采用实生繁殖，大批梨树低产劣质。此外，整个南田梨区1985年后发展的新品种梨园，均存在授粉树搭配比例失调的现象，严重影响梨树的授粉受精。为改变上述状况，我们结合新品种引种，于1994年春开始进行“梨多头高接改换良种和授粉树”试验，采取单芽切腹接的方法，在新星村、朱山、树根三个村，共高接303株大树，高接第二年始花结果。此法具有方法简单、接头多、成活率高、树冠恢复快和早丰产等特点，对梨树高接换种及高接授粉树有一定的应用价值。现将3年来…     

怎样给蔬菜进行根外追肥

根外追肥是与土壤施肥相辅相成的，是蔬菜生产上一种经济速效的提高产量和改善品质的施肥方法（即叶面施肥），它可以通过叶面直接吸收利用．尤其在蔬菜生长后期．根系老化，吸收运输能力衰弱时喷施．可以迅速补充植株体内养分的不足或营养失衡．促进蔬菜生长旺盛。防止早衰，延长供应朋。根外追肥在茄果类或瓜类生育期长，分批采收的蔬菜上效果尤为明显。     

海南“澄迈福橙”敲响大超市的门

口感好硒含量高采摘期长,这是海南省“澄迈福橙”的特点,澄迈县将福橙促销瞄准大超市。2009年2月20日,该县在省城海口市召开福橙品尝推介会,向超市促销这一地方名牌农产品。     

西洋梨栽培的品种选择

依引进西洋梨品种的表现，换成熟期初步选择介绍了6个较有发展前途的优良品种。     

Willingness to travel to avoid recreation conflicts in Danish forests

Conflicts among forest visitors have direct effects on the quality of a recreational experience. As the number of visitors to forests close to residential areas increases, as well as the number of different activities, so does the potential for perceived conflicts. According to the literature, expanding knowledge of conflict characteristics and their causes is important for recreation planners and managers who aim to reduce conflicts.In the present study, different forest user groups were identified and categorised according to their pursued activities, and for each group, causes of conflict were identified. Furthermore, a choice experiment was constructed to estimate the distance visitors are willing to travel to encounter few visitors as opposed to many visitors, and thereby potentially experience fewer conflicts. Comparing the marginal willingness to travel (WTT) of different user groups suggests that some groups have a WTT further than the average to reach a forest with ‘Few’ visitors. The average WTT to reach a forest area with ‘Few’ visitors. ‘Mountain bikers,’ ‘Peace and nature lovers’ and ‘Horse riders’ are willing to travel 4 km more than the average per visit to reach a less crowded forest. At the other end of the scale, we find that people who are doing physical exercise are willing to travel 2 km less than the average to reach a less crowded forest.     

桃砧木筑波4号和筑波5号抗根癌病鉴定评价

以当年实生筑波4号(Prunus persica‘tsukuba-4’)和筑波5号(Prunus persica‘tsuku-ba-5’)的新梢为材料,采用人工接种发根土壤杆菌(Agrobacterium rhizogenes)的方法研究了其对根癌病的抗性及其分离情况。结果表明,筑波4号实生群体中免疫、高度抗病、中度抗病、中度感病和高度感病类型分别占0.90%、1.80%、9.01%、18.92%和69.37%。筑波5号实生群体中免疫、高度抗病、中度抗病、中度感病和高度感病类型分别占1.01%、3.03%、8.08%、38.38%和49.49%。筑波4号和筑波5号对发根土壤杆菌的抗性存在显著分离现象,可从中筛选出抗性极强的植株。     

A novel hierarchical framework to evaluate residential exposure to green spaces

Landscape Ecology - It has been widely acknowledged that exposure to green space (e-GS) has positive health benefits to urban residents. While most studies estimate e-GS from an availability or...     

A Method to Efficiently Apply a Biogeochemical Model to a Landscape

Biogeochemical models offer an important means of understanding carbon dynamics, but the computational complexity of many models means that modeling all grid cells on a large landscape is computationally burdensome. Because most biogeochemical models ignore adjacency effects between cells, however, a more efficient approach is possible. Recognizing that spatial variation in model outputs is solely a function of spatial variation in input driver variables such as climate, we developed a method to sample the model outputs in input variable space rather than geographic space, and to then use simple interpolation in input variable space to estimate values for the remainder of the landscape. We tested the method in a 100 km×260 km area of western Oregon, U.S.A. , comparing interpolated maps of net primary production (NPP) and net ecosystem production (NEP) with maps from an exhaustive, wall-to-wall run of the model. The interpolation method can match spatial patterns of model behavior well (correlations>0.8) using samples of only 5 t o 15% of the landscape. Compression of temporal variation in input drivers is a key step in the process, with choice of input variables for compression largely determining the upper bounds on the degree of match between interpolated and original maps. The method is applicable to any model that does not consider adjacency effects, and could free up computational expense for a variety of other computational burdens, including spatial sensitivity analyses, alternative scenario testing, or finer grain-size mapping.     

Relations of Phenolic Inhibitors to Resistance of Immature Apple Fruits to Rot

Extracts of phenolic compounds from maturing Red Delicious apple tissues containing p-coumaryl-quinic acids and chlorogenic acid were shown to be inhibitory to germination of Botrytis cinerea spores and mycelial growth of B. cinerea, Penicillium expansum and Alternaria sp. Measurements of the content of both acids during the growing season showed that the content of phenolic compounds was highest early in the season and decreased as the fruit matured. The decrease coincided with the rise in susceptibility of the fruit to rot caused by B. cinerea. The concentration of p-coumaryl-quinic acid was highest near the skin and lowest near the core.