共查询到20条相似文献，搜索用时 696 毫秒
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桃小食心虫测报及综合防治技术黄智耀，石建伟，汪秋更，王建芳（嵩县林业技术推广站）桃小食心虫是苹果、山楂、桃、李等果树的主要至果害虫，近几年在豫西普遍发生，严重的降低了果品的质量和产量，直接影响着果品的经济效益。从１９８９年起，洛阳市气象局、嵩县林业局... 相似文献
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京郊平谷县充分发挥本县的自然优势和区位优势,建起了面积为３５万亩的八大果品基地。１９９８年,全县果品总产达１－４３亿公斤,连续１３年居京郊之首。其中,仅大桃面积就发展到了１０万亩,年产量占据北京市的“半壁江山”。尤其是刘家店乡的万亩蟠桃园,其规模为华北地区最大,品质最好,被誉为果中“精品”。在这些果品中,“八月脆”大桃获第三届全国农业博览会知名品牌称号,后北宫大桃、镇罗营板栗、北寨红杏和西樊各庄富士苹果荣获农业部颁发的绿色食品称号。平谷果品发展快、品牌精@卞斋 相似文献
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随着人民生活水平提高,人民群众对果品的无公害安全程度要求越来越高,为此,国家也制定了一系列生产无公害果品生产标准与政策。一些地区为满足人民群众对无公害果品的需求,建立了无公害生产基地,生产无公害果品。笔者根据本地无公害桃树生产基地建设与生产无公害桃果品,提出无公害桃树生产技术一些措施,仅供参考。 相似文献
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浙西南高山林区生态桃园的建立与管理 总被引：1，自引：0，他引：1
利用高山林区得天独厚的生态环境和气温低物候期较迟的特点种植中晚熟桃,不但有利于无公害果品的生产,而且能推迟到淡季上市,市场前景广阔。本文分析了高山林区种桃的利弊,并从园地选择、肥水管理、病虫防治等方面阐述了桃无公害栽培技术。 相似文献
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随着人民生活水平提高，人民群众对果品的无公害安全程度要求越来越高，为此，国家也制定了一系列生产无公害果品生产标准与政策。一些地区为满足人民群众对无公害果品的需求，建立了无公害生产基地，生产无公害果品。笔者根据本地无公害桃树生产基地建设与生产无公害桃果品，提出无公害桃树生产技术一些措施，仅供参考。 相似文献
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以朝阳地区栽培的柏山水蜜桃、久保桃、丰白桃为材料,对其果实性状与经济效益进行调查与分析,结果表明:3个品种桃盛花期分别为4月23日至28日、4月25日至30日、4月28日至5月3日;久保桃与柏山水蜜桃花期吻合程度高,是其最佳授粉树,平均座果率为92%。柏山水蜜桃平均最大单果重为750 g,分别是久保桃、丰白桃的2.4倍和2.9倍。柏山水蜜桃果实成熟期最晚,为8月中下旬,较久保桃晚熟20~30 d,较丰白桃晚熟40 d左右,具有市场价格优势。柏山水蜜桃单位面积平均产量为32 677 kg·hm-1,产值为32.7万元,分别是久保桃、丰白桃产值的1.27倍和1.45倍。 相似文献
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A virtual fruit model simulating seasonal changes in several peach (Prunus persica (L.) Batsch) fruit quality traits during the final growth stage is presented. The quality traits considered are fruit size, the proportion of total fruit mass consisting of fruit flesh, dry matter content of the flesh and the concentrations of sucrose, glucose, fructose and sorbitol in the flesh, which are used to calculate a sweetness index. The virtual peach fruit model was developed by adapting and integrating three existing process-based models describing fruit dry mass growth, fruit fresh mass growth and sugar accumulation in the flesh into one complex system. Data sets of peach fruit growth and quality obtained from one field site over several years were used to estimate parameters and evaluate the virtual peach fruit model. Output from the model showed good agreement with the field data. Insight into the complex nature of the virtual peach fruit model, i.e., its ability to show emergent properties, was accomplished by conducting a series of theoretical experiments. The virtual peach fruit model was shown to be sensitive to management and environmental factors (leaf:fruit ratio, stem water potential and, to a lesser extent, weather). Its ability to generate simple laws relating to physiological variables and quality parameters was also demonstrated. Finally, the virtual peach fruit model was able to reveal complex behaviors resulting from changes in water potentials or leaf:fruit ratios over time. 相似文献
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为了提高肥城桃果实品质,以‘红里’为试材,研究了叶面喷施不同质量浓度的油菜素内酯对肥城桃叶片的叶绿素含量、光合作用及其果实内可溶性固形物含量、可溶性糖含量、蔗糖含量、果糖含量、淀粉含量和单果质量等指标的影响。结果表明,不同的肥城桃发育时期喷施不同质量浓度的油菜素内酯对果实品质的影响不同,硬核期喷施0.10 mg/L的油菜素内酯的处理效果最佳,与对照相比,叶绿素含量、净光合速率、可溶性固形物含量、可溶性糖含量和单果质量分别提高了11.18%、14.42%、8.01%、18.39%和11.88%。 相似文献
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We modeled the effects of weather and source-sink factors on mango fruit growth. The peach fruit-growth model "Cashoo" was adapted for mango fruit. The model accounts for the main processes of fruit growth, i.e., leaf photosynthesis, fruit demand, fruit respiration, and storage and mobilization of leaf and stem reserves. Simulations for three successive years and for various leaf-to-fruit ratio treatments showed good agreement with observed fruit growth data. Simulations of fruit growth under different climatic conditions, especially with contrasting temperature and radiation, and for different values of initial fruit dry mass and leaf-to-fruit ratio, showed that variations in fruit growth among years can be partly explained by climatic variations through their effects on leaf photosynthesis, fruit demand and fruit growth rate. However, climatic changes contribute substantially less to observed variability in fruit growth than to initial fruit dry mass and leaf-to-fruit ratio. 相似文献
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Data on the seasonal patterns of fruit growth and dark respiration of two peach (Prunus persica (L.) Batsch) cultivars were combined with temperature data to calculate the carbohydrate requirements of an "average" peach fruit from bloom to harvest. The two peach cultivars used were June Lady (an early maturing (mid-June) cultivar) and O'Henry (a late maturing (early-August) cultivar). At harvest, the mean dry weight of the June Lady fruit was 17.8 g (139.7 g fresh weight) and of O'Henry fruits was 30.9 g (213.9 g fresh weight), and the times from full bloom to harvest were 107 and 154 days, respectively. The total calculated fruit respiration requirements were 132 and 300 mmol CO(2) fruit(-1) season(-1) for June Lady and O'Henry fruits, respectively. Total calculated carbohydrate requirements for fruit growth and respiration are 23.9 and 43.8 g CH(2)O fruit(-1) season(-1) for June Lady and O'Henry fruits, respectively. Fruit respiration accounted for 16.3% of the total carbohydrate requirements of June Lady fruits and 0.5% of the total carbohydrate requirements of O'Henry fruits. 相似文献
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4份桃种质挥发性成分的GC-MS分析 总被引：1，自引：0，他引：1
为了分析桃果实中共有的挥发性成分及初步探讨果皮毛和果肉颜色性状对挥发性成分的影响情况,以此2对性状均存在差异的4份桃种质为试材,采用顶空固相微萃取方法提取其成熟果肉中的挥发性成分,并用气相-质谱联用仪对其进行了测定。结果表明:4份桃种质中共鉴定出116种挥发性成分,其主要为酯、醛、醇和烷烃等类物质。从挥发性成分的种类数量上看,白肉桃‘大久保’和‘华光’中检出的挥发性成分种类较多,分别有68和52种;而2份黄肉桃种质中检出的挥发性成分种类均较少。从挥发性成分的种类上看,2份普通桃与2份油桃中的差异挥发性成分总共仅有3种,其分别为反式-2,4-庚二烯醛、戊酸-2,2,4-三甲基-3-异丙酸-异丁酯和脱氧精胍菌素,远低于2份白肉桃与2份黄肉桃种质中差异挥发性成分的数量(13种)。此外,从挥发性成分的类群上看,2份白肉桃含有较多的"青香型"的C6类化合物,而2份黄肉桃含有较多的"果香型"的酯和内酯类化合物。文中综合分析认为,果皮毛的有无和果肉的颜色性状均可能影响果实中挥发性成分的数量和种类,但后者的影响较为明显。 相似文献
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