共查询到19条相似文献，搜索用时 156 毫秒
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针对植物生长调节剂在我国蔬菜中的广泛应用，阐述了蔬菜扦插中常用的植物生长调节剂的种类、使用技术及影响蔬菜扦插成活的环境条件，旨在为植物生长调节剂在蔬菜扦插繁殖中安全使用提供参考，推动蔬菜繁殖向多元化方向发展。 相似文献
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芒果常用植物生长调节剂毒性和残留研究进展 总被引：2，自引：0，他引：2
《中国果树》2014,(3)
阐述了芒果生产中常用植物生长调节剂多效唑、乙烯利、赤霉酸(GA3)和氯吡脲的毒性及其对人体的潜在危害,及这4种植物生长调节剂在芒果生产上残留的研究进展,并提出生产中减少植物生长调节剂残留的建议,展望了植物生长调节剂的发展趋势。 相似文献
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植物生长调节剂种类繁多,用途广泛。到目前为止,各国用于农、林、园艺上的植物生长调节剂多达一百余种。本文拟从以下几方面阐述植物生长调节剂与蔬菜生产的关系。 1.种类繁多植物生长调节剂与杀虫、杀菌剂不同,具有种类多样、功能各异的特点(见表1)。 相似文献
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植物生长调节剂在茄果类蔬菜上的应用进展 总被引：4，自引：0，他引：4
概述了植物生长调节剂的作用和当前茄果类蔬菜作物栽培中常用生长调节剂的种类、主要作用及其调控生理基础，指出了植物生长调节剂使用应注意的问题及其应用前景。 相似文献
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植物生长调节剂在设施栽培中的应用 总被引：1，自引：0，他引：1
植物生长调节剂是人工合成的具有天然植物活性的物质.近年来,植物生长调节剂种类不断增多,应用日益广泛,特别是在设施果树、蔬菜栽培中,促进果树、蔬菜生长发育,提高果品、蔬菜产量和品质等方面都有显著的作用. 相似文献
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为了明确莠去津土壤残留对后茬蔬菜的影响,在室内采用毒土添加法研究了莠去津不同土壤残留量对黄瓜、豇豆、辣椒和菜薹光合作用和幼苗生长的影响。结果表明:莠去津土壤残留量为0.21、1.84、0.24、0.11 mg·kg~(-1)时,导致黄瓜、豇豆、辣椒和菜薹叶片PSⅡ最大光化学效率(Fv/Fm)下降10%;4种蔬菜分别在接近此有效成分剂量时(黄瓜0.2mg·kg~(-1)、豇豆2 mg·kg~(-1)、辣椒0.2 mg·kg~(-1)、菜薹0.1 mg·kg~(-1)),电子传递速率(ETRⅡ)显著下降,且单株鲜质量抑制率达到50%;4种蔬菜对莠去津土壤残留的敏感性顺序为:菜薹黄瓜辣椒豇豆;Fv/Fm可作为早期预知轮作蔬菜是否受到莠去津残留潜在药害的指标,Fv/Fm的ID_(10)为轮作蔬菜是否受药害的临界值。 相似文献
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蔬菜农药残留现状及其潜在风险分析 总被引：6，自引：0，他引：6
通过对浙江省蔬菜生产中使用农药情况调查和94种农药的残留检测,分析了目前蔬菜中主要残留农药品种及其潜在风险。结果发现,目前蔬菜生产中主要使用78种农药,包括杀虫剂、杀菌剂、生长调节剂和除草剂,以低毒农药品种为主|蔬菜中主要残留28种农药,检出频率较高的农药依次为啶虫脒、多菌灵、毒死蜱、吡虫啉、烯酰吗啉、三唑磷、霜霉威和哒螨灵等,检出的残留农药品种中,有46.4%在调查中未发现有使用,甲胺磷等高毒农药仍有检出。农药产品标识和农药成分不明是主要风险之一。此外,蔬菜中使用的28种农药尚未建立统一的标准检测方法,蔬菜食用仍存在农药残留安全风险。 相似文献
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蔬菜农药残留安全评价模式探讨 总被引：3，自引：0，他引：3
通过分析蔬菜农药残留超标的原因,提出开展蔬菜农药残留安全系统评价和风险评估的模式及措施,旨在探讨如何提高蔬菜质量安全水平,促进蔬菜产业的健康发展。 相似文献
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SummaryThe aim of this study was to provide an overview of the causes and control of calcium (Ca)-deficiency disorders in vegetables. Ca-deficiency is usually related to the inability of the plant to translocate adequate Ca to the affected part. Many vegetables develop unique symptoms: for example blackheart in celery, tipburn in lettuce, chervil, onion, fennel, chinese cabbage and other cabbages, blossom end rot (BER) in tomato. Ca-deficiency disorders in vegetables can be controlled by various means. The growing medium influences the development of Ca-deficiency symptoms in plants. Restriction of the root volume is one factor that favours the development of Ca-deficiency symptoms in leafy vegetables, but reduces the incidence of BER in pepper. Ca-deficiency can also be avoided by using reasonable levels of nitrogen in the nutrient solution. Cations depress Ca-uptake and distribution, while anions depress the development of tipburn in plants. Ca-deficiency can be avoided by using the recommended level of salinity for each crop. Too high a salinity level increases the symptoms of Ca-deficiency in plants. Watering helps to prevent Ca-deficiency injury, as when growing vegetables outdoors. Maintaining an optimum soil moisture level helps to promote adequate movement of Ca to the roots and into the plant. A low relative humidity during the day-time increases the Ca-contents of leaves in leafy vegetables with an open growing point, but reduces the Ca contents of fruit and the inner leaves of leafy vegetables with a closed growing point. Avoiding too long a duration of supplementary lighting, too high a light intensity, and the use of high-pressure sodium lamps can prevent Ca-deficiency injury in plants. Shading may influence the incidence of BER, by reducing the appearance of symptoms of BER. Growing plants under a far-red wavelength filter helps to prevent Ca-deficiency disorders. Avoiding high or low temperatures also prevents Ca-deficiency injury. A negative DIF value (DIF = the difference between the day-time and night-time temperatures; a negative DIF means the night temperature is higher than the day temperature) may influence the incidence of tipburn injury by reducing its appearance. Air flow to the affected parts of plants can help to avoid the symptoms of Ca-deficiency. Ca sprays also help to prevent Ca-deficiency disorders in plants. Mulches can be used to protect plants against Ca-deficiency. Some crop varieties are less susceptible to Ca-deficiency. The plant growth regulator, Cultar (paclobutrazol, an inhibitor of gibberellin-biosynthesis), may influence the symptoms of Ca-deficiency in plants by reducing the appearance of the disorders. Planting a little later than the optimum date can avoid Ca-deficiency symptoms in leafy vegetables in Nordic countries. Harvesting a little earlier than the optimum date can also avoid Ca deficiency- symptoms in leafy vegetables. 相似文献