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多效唑在苹果树体内的残留春在抑制生长中的作用 总被引：3，自引：0，他引：3
通过盆栽试验显示，土施多效唑后植株生长受到强烈的抑制，抑制效果可在当年维持整个生长季节。第二年更换土壤、除去、多效唑后，体内贮存的多效唑可以抑制植株生长约半个生长季。土施情况下，多效唑抑制作用的多年持续效果，主要靠植株从土壤中不断吸收新的多效唑。 相似文献
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采用不同浓度的多效唑(0、300、600、900、1200 mg/L)对盆栽草坪草进行叶面喷施,以研究多效唑对草坪草多年生黑麦生长特性的影响.结果表明:多效唑能有效地抑制多年生黑麦草的生长,降低植株高度,提高草坪密度,并使叶片颜色加深,叶片变短,改变生长格局.因此,多效唑能有效地改善多年生黑麦草的坪用性状. 相似文献
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多效唑对八仙花组培苗营养生长及成花的影响 总被引：6，自引：1，他引：6
以八仙花1、2 a生组织培养苗为试验对象,研究了多效唑不同浓度、不同施药时间、不同施药次数对八仙花组培苗促成栽培中其植株营养生长及成花的影响.结果表明:施用浓度和时间是多效唑抑制八仙花组培苗植株营养生长促进其生殖生长的关键,7月中旬以浓度100～150 mg/L的多效唑溶液对八仙花1、2 a生组织培养苗进行叶面喷施,最有利于其花芽分化,成花率高,且从株型、花形花色等各项指标综合考虑,多效唑对促进八仙花2a生组培苗成花效果更显著.施药次数也影响八仙花组培苗营养生长和成花,连续施药3次对抑制其营养生长促进成花效果最佳. 相似文献
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多效唑并非农药，是一种植物生长调节剂。它主要是抑制植物细胞生长。有些花卉在采用控水制肥、缩土修剪没有效果的情况下，就可以使用多效唑，它可以使植物生长矮壮，叶色浓绿，花艳果美。所以说多效唑是养花的“好助手”。 相似文献
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多效唑对杏树生长结果影响试验 总被引：1，自引：0，他引：1
对三至五年生杏树进行发芽前土壤施用多效唑和生长季叶面喷施多效唑处理，结果表明：两种处理都能抑制枝条生长，控冠作用明显；土壤施用和叶面喷布都能有效提高当年花芽率。且土壤施用多效唑有利于提高当年坐果率。 相似文献
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不同生长调节剂对水仙生长和开花的影响 总被引：2，自引：0，他引：2
为改善水仙室内水养株型欠佳等现象,采用不同浓度的赤霉素、多效唑、萘乙酸单独处理以及组合溶液对水仙的生长和开花进行浸泡水养处理研究。结果表明:20～40mg/L多效唑或多效唑+赤霉素、多效唑+萘乙酸和多效唑+赤霉素+萘乙酸处理均对水仙植株具有明显的抑制生长作用,表现出植株矮化、花茎和叶片变短、叶色浓绿,以及花期延长等理想状态。此外,多效唑+赤霉素、多效唑+萘乙酸和多效唑+赤霉素+萘乙酸组合处理时,能减缓多效唑单独处理对水仙的黄化作用,观赏价值得到明显提高。 相似文献
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多效唑对桃树生长和结果的影响 总被引：3，自引：0，他引：3
应用多效唑对桃树进行土施和叶面喷布等不同方法,不同剂量的试验。土施0.125～1.0g/m~2,叶面喷布500ppm×2以上的浓度都可有效地抑制植株营养生长。它降低了新梢生长长度,抑制了副梢的发生和生长,以及干周的增长。多效唑在抑制营养生长的同时也促进了生殖生长,有效地促进花芽形成,降低了始花节位,增加了成花节位数和复花芽节位数。对果实大小也有促进作用。成倍地提高了早期产量。施用同等剂量,土施的效果优于叶面喷布。在我国中部地带,陇海沿线沙壤土上以0.25/m~2的剂量为好,第二年以后用量减半。在土施情况下它的“呆滞期”只1.0～1.5个月。土施应在旺盛生长前1.5～2.0个月以前施入。 相似文献
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Liz Copas R. R. Williams Gillian M. Arnold 《The Journal of Horticultural Science and Biotechnology》2013,88(4):455-458
SummaryPaclobutrazol was applied, with or without mefluidide, to the grassed alleyways between the bare soil tree lines in a bush cider orchard cv Michelin. The chemical not only suppressed grass growth but, in the year following application, produced typical paclobutrazol effects on the trees in adjacent rows including a reduction in growth. 相似文献
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对苹果、桃、樱桃和葡萄进行了盆栽土施不同剂量PP333的试验。结果表,由于PP333在植物体内移动缓慢,PP333的抑制效果不能立即表现出来。PP333在植物体内的移动速度在苹果中较慢,在桃和樱桃中较快,葡萄介乎二者之间。 PP333对加长生长的抑制作用主要表现为节间的缩短和较早地停止生长,以及由此产生的节位数的减少。此外还表现在茎粗,单叶面积,叶片总面积,茎及叶的鲜,干重的降低以及副梢数目的减少和长度的降低上。PP333对根系也有抑制作用,但比地上部小,从而改变了根/冠比。土施PP333 1.0ppm以上的剂量有强烈的抑制作用,PP333抑制生长的强度与使用的浓度呈指数曲线相关关系。PP333促使新老叶片加厚。 相似文献
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P.- E. Lauri 《The Journal of Horticultural Science and Biotechnology》2013,88(1):149-159
The long-term effects of an overall foliar paclobutrazol application (750 mg a. i. per tree) was tested on sweet cherry spur growth and fruiting. Leaves and fruits were counted on spurs situated on long upright shoots, during the year of treatment and in the following two years. Paclobutrazol significantly increased the mean number of leaves per spur during the three year study. It also significantly increased the number of fruits per spur on three year old spurs, whereas no differences were observed on two year old spurs. Furthermore, the chemical treatment led to a significant increase in the number of fruits per corymb at the base of one year old long shoots. Otherwise, paclobutrazol appeared to induce spur ramification in the year of treatment. The same year, these ramifications, which did not bear fruits, accounted for 16.5% of the total number of spur leaves. This phenomenon was probably due to a direct action of the chemical spray since almost no new ramifications were produced the following years. In addition to the known retardation of extension shoot growth, foliar application of paclobutrazol thus appeared effectively to enhance leaf and fruit production of the spurs, not only in the year of treatment but also during the two following years. 相似文献
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G. C. White R. I. C. Holloway 《The Journal of Horticultural Science and Biotechnology》2013,88(4):377-389
The first three years’ growth of Cox’s Orange Pippin on M.26 was compared in a trial in which a four-foot square around the tree received either simazine, or straw mulch, or the same treatment as the surrounding area, which was grass or cultivation. Two rates of Nitrochalk were used.The treatments influenced leaf area and nutrient composition; shoot number, length and weight; and root size and distribution.Competition from a partial weed cover in the first year produced a severe growth reduction which persisted in the following years and was not reduced by the higher nitrogen rate.A four-foot square kept weed-free with simazine enabled trees to be grassed in the year of planting and yet make growth comparable to those kept clean-cultivated. Less than 1% of the applied simazine remained active in the soil at the end of the third year.Mulching produced the most vigorous trees. It is considered that soil moisture availability was the main factor influencing tree establishment. 相似文献
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L. E. Williams P. J. Biscay R. J. Smith 《The Journal of Horticultural Science and Biotechnology》2013,88(5):625-631
SummaryGrapevines, cv. Thompson Seedless were treated with the plant growth regulator paclobutrazol in the spring of 1984. The treatments consisted of four soil application rates (including a zero control) of paclobutrazol on two phenological dates (budbreak and bloom). Vegetative growth, as measured by pruning weight, vine yield and fruit maturity characteristics, were determined in 1984 and in the next three growing seasons. There was no significant difference in vine yield between treatments at harvest in 1984; however, the fruit of vines receiving paclobutrazol at budbreak had accumulated less sugar at that time. Paclobutrazol application significantly (P < 0.01 ) reduced pruning weights in 1984 for all vines receiving paclobutrazol. Only the highest rate of paclobutrazol significantly reduced pruning weights in 1985. The number of clusters per vine and yield were significantly less for the treated vines than for the control ones in 1985 and 1986. Pruning weights in 1986 and yield in 1987 showed no significant differences between treatments. The results indicate that a single soil application of paclobutrazol was effective in reducing vegetative growth of Thompson Seedless grapevines for a period of two years if the rate of application was greater than 1.1 kg a. i. ha-1. However, the adverse effect of this growth regulator on vine yield indicate that it would be of little practical use when applied via the soil to this seedless cultivar. 相似文献
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A. W. Whiley J. B. Saranah B. N. Wolstenholme T. S. Rasmussen 《The Journal of Horticultural Science and Biotechnology》2013,88(5):593-600
Mid-anthesis foliar sprays of paclobutrazol (PB) at 2.5, 1.25 and 0.62 g a.i. I-1 reduced spring growth and altered dry-matter distribution in fruiting spring shoots of ‘Hass’ avocado.(Persea americana Mill.) trees. There was a decrease in dry matter allocation to vegetative components and an increase in allocation to fruit. The starch concentration in the wood of spring shoots on trees treated with 2.5 g a.i. I-1 foliar PB was increased by ca. 70% compared with spring shoots from trees of other treatments. The mid-anthesis foliar treatments also reduced summer growth by ca. 20%. Trunk injection of PB at 0.2 g a.i. m~2 of canopy silhouette area when the spring growth matured, in addition to a mid- anthesis foliar spray of 1.25 g a.i. I-1, reduced the length of summer shoots by 36% when compared with untreated trees. The spray treatments of 2.5 and 1.25 g a.i. T1 PB at mid- anthesis increased the mean fruit size at harvest by 16 and 11% respectively. Fruit yield was not significantly affected by PB applications on an annual basis. However, the PB spray treatments of 1.25 and 0.62 g a.i. I-1 significantly increased the two year cumulative yield by ca. 63%. There was no significant effect from the trunk injection treatment on fruit yield in either the season of treatment or the following season. 相似文献
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PP333对元帅苹果幼树生长,结果的影响 总被引：5，自引：0，他引：5
对5年生的‘元帅’苹果幼树,叶面喷施不同浓度的PP_(333)。结果表明,PP_(333)处理树新梢生长受抑制,叶片面积增大,厚度和叶绿素含量增加,叶数不减少;促进成花,提高座果率,最终增加产量。处理对果实L/D值无明显影响,不减少单果重。5—6年生的‘元帅’,处理当年即显示出抑制生长、促进成花的作用。处理后第2—3年的效应表现更为明显,并提高座果率。 相似文献