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2005年,辽宁省葫芦岛市夏季自然气候与正常年份有明显不同,这种异常气候给果树生产造成了不利的影响,为了验证相互之间的关系,我们比较分析了自然气候条件与正常年相关值变化,并调查了异常气候条件下果树的生长发育和产量,现将结果报道如下。12005年自然气候条件变化表现1.15至 相似文献
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<正>农药是防治果树病虫害,提高果品产量和品质的重要保障。但由于树种、环境、人为等因素,药害经常发生,影响果树的生长,应引起我们的重视。1药害症状1.1急性药害施药后很快(几小时或几天内)就出现症状的为急 相似文献
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江苏省云台山区野生果树种质资源初报 总被引:2,自引:0,他引:2
云台山地处江苏省东北部,东临黄海,山区面积约150 km2,海拔高度平均300 m,最高峰海拔625 m.气候属暖温带向亚热带过渡并兼东南季风影响的海洋性气候,年平均气温为14 ℃,平均年降水量936.9 mm,平均年日照时数为2 501.5小时.土壤以地带性棕壤土为主,地形地势复杂,植被种类繁多,野生果树种质资源丰富.作者从1982年开始,重点搜集、整理云台山区野生果树种质资源,现将该区野生种质资源报告如下. 相似文献
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果园生态条件稳定,为各种昆虫的生存提供了优越的环境,导致果树害虫种类多、数量大,对果树生产产生严重不良影响,导致重大经济损失。而果树产品的果实都是直接供食用,安全性要求更加严格,进行害虫防治时,所用的方法和杀虫药剂残留情况必须符合无公害或绿色食品生产要求,这就增加了果树害虫的防治难度。只有掌握主要害虫的发生规律,进行准确的预测预报,才能为科学防治提供正确依据。 相似文献
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Francesca Rapparini Rita Baraldi G. Bertazza Barbara Branzanti S. Predieri 《The Journal of Horticultural Science and Biotechnology》2013,88(6):1101-1109
Micropropagated plantlets of OH x F 51 and GF 677, respectively pear (Pyrus communis L.) and peach (Prunus persica x Prunus amygdalus) clonal rootstocks were inoculated during an early weaning stage of acclimatization with Glomus sp. Both rootstocks were well colonized, although the infection of OH x F 51 spread more slowly. At the end of initial vegetative growth, mycorrhizal plants of both rootstocks showed a three-fold increase in shoot length over control plants. Mycorrhizal plants also had longer internode and greater fresh mass. The root/shoot ratio was especially altered by arbuscular mycorrhizal inoculation in OH x F 51 plants, which showed a greater increase in shoot rather than in root biomass. The growth-promoting ability of endomycorrhizal fungus persisted throughout the experimental period: Glomus sp. induced a greater development of both rootstocks in the second growing year, after overwintering. Colonization of micropropagated plants by arbuscular mycorrhizal fungus appears to alter the carbohydrate status in stems and roots. Mycorrhizal plants always had a higher content of total soluble sugar, although there were no differences in soluble carbohydrate concentration between inoculated and uninoculated plants. Starch accumulation was found only in mycorrhizal plants of the peach rootstock. 相似文献