共查询到19条相似文献，搜索用时 359 毫秒
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多效唑对桃新梢生长的抑制效应 总被引：1，自引：0，他引：1
在桃树新梢长21～30cm时，采用土施3g／m215％多效唑或叶面喷施500×10－6、1000×10-6多效唑均能有效地控制新梢生长，促进花芽分化，促使枝梢粗壮，导致节间缩短，叶色变深变浓，同时使叶片皱缩而厚度增加。多效唑在5月初处理早熟桃新梢时，对桃当年产量无影响，对来年产量影响较大，叶面喷施500×10－6、1000×10－6及土施多效唑分别比对照增产17．14％、20．95％、31．43％。 相似文献
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ＡＥＴ１号生根粉５００ｐｐｍ溶液与同浓度溶液与黄泥拌浆，不同浓度浴液与黄泥拌浆及不同季节处理扦插试验，均采用随机区组排列４重复，两种处理杉木插穗扦插对成活率及苗木生长均有显著的促进作用，而以５００ｐｐｍ溶液拌黄泥浆比该溶液不拌黄泥浆更好：平均成活率７８．５７％，分别比纯液和对照高６．５３个百分点和９．２５个百分点；平均苗高６１ｃｍ，分别比纯液和对照高２０．１％和７０．３９％；平均地径０．６４ｍ，分别比纯液和对照高３６．２％和７２．９７％；其根长、根数也比纯液和对照的长和多。ＡＨＴ生根粉不同浓度溶液拌黄泥共处理杉穗扦插以５００ｐｐｍ浓度的成活率最高，生长最好。 相似文献
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据对浙江杉木一代种子园的土壤、植株针叶和球果抽样测定表明，土壤中水溶性硼含量只有０．１３～０．２４ｐｐｍ，大大低于０．５ｐｐｍ的临界浓度。针叶和球果中有效硼含量也分别只有８，９～２２．７ｐｐｍ和４．１～１６．１ｐｐｍ，也低于正常含量。经四年施硼试验研究结果表明，进入正常结实期的杉木种子园施入一定量的硼肥，其单株和单位面积的球果产量分别比对照平均增产３５．０８％和４８．４２％，出籽率提高９．４０％，发芽率提高１４．９９％，千粒重增加６．５４％。施肥时间以４月中旬和６月中旬以前为佳，每株施６０ｇ硼砂较为适宜。试验结果还表明，硼肥和复合肥配比混施增产效果更加明显，单株和单位面积球果产量分别比单施复合肥和硼肥增产２２．５５％和１５．７１％以上，种子品质也有显著提高。 相似文献
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多效唑对桃形李幼树的化学调控试验 总被引：3，自引：0，他引：3
经试验表明，多效唑对桃形李幼树有较强的矮化控冠效应；能抑制新梢生长，提高中、短结果枝比例，对提高叶绿素含量也有一定作用。根据不同剂量多效唑对桃形李幼树的抑制程度及持续效应，宜采用１０００ｐｐｍ（喷施）、０．５ｇ／ｍ＾２（土施）的剂量。 相似文献
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ABT生根粉处理杉穗扦育苗试验初报 总被引：2，自引：0，他引：2
ＡＢＴ１号生长根粉５００ｐｐｍ溶液与同浓度溶液与黄泥拌浆，不同浓度浴液与黄泥拌浆及不同季节处理扦插试验，均采用随机区组排列４重复，两种处理杉木插穗扦插对成活率及苗木生长均有显著的促进作用，而以５００ｐｐｍ溶液拌黄泥浆比该溶液不拌黄泥浆更好，平均成活率７８．５７％分别比纯液和对照高６．５３个百分点和９．２５个百分点，平均苗高６１ｃｍ，分别比纯液和对照高２０．１％和７０．３９％平均地径０．６４ｃｍ，分 相似文献
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PP333与CaCl2对绿玉树扦插苗抗寒性的影响 总被引：8，自引：0，他引：8
对绿玉树扦插苗喷洒不同浓度、不同配比的PP333(多效唑)和CaCl2，以提高绿玉树的抗寒能力。试验结果表明：多效唑能显著降低新梢长度的生长，增加分枝数，抑制低温处理时膜透性的增加，提高绿玉树对零上低温的抵抗能力。0．2％PP333能提高叶绿素含量，但低浓度的PP333(0．1％-0．15％)却降低了叶绿素的含量。CaCl2对绿玉树扦插苗的形态影响不明显，0．015％-0．1％的CaCl2能抑制低温下细胞膜透性的增加，提高叶绿素含量。 相似文献
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几种植物生长调节剂对澳洲坚果幼树的控梢效果比较 总被引：1，自引：0，他引：1
用植物生长调节剂多效唑、乙烯利、矮壮素、B9对澳洲坚果幼树进行控梢处理,结果表明:多效唑对澳洲坚果幼树的生长有极显著的抑制作用,其中3和2.5g/L处理的幼树营养生长受到严重抑制;乙烯利对澳洲坚果幼树新梢的抽发、梢长、节间长有显著影响,1.5和2g/L处理后幼树的新梢表现出乙烯的"三重效应"。矮壮素和B9对澳洲坚果幼树新梢抽发抑制作用极显著,矮壮素1.5、2g/L处理的幼树在喷药后2个月没有抽发新梢;B9处理的幼树新梢抽发量很少,对照的新梢数是其它处理新梢数的数十倍。 相似文献
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沼气发酵残留物在昌宁县核桃栽培中的应用 总被引：1，自引：0，他引：1
在昌宁县柯街镇仙岳村杞木林村民小组进行了沼气发酵剩余物对核桃生长及结果影响试验.结果表明,在核桃雌花初期和第一次果实迅速膨大期喷施、浇施沼液以及采果后深施沼渣等措施对核桃植株增产效果明显,平均坐果率提高到94.5%,比对照增加90.5%;株鲜核平均产量达41.7 kg,增产212%;盛果期平均株产鲜核果316.1kg,比对照增加54.2%. 相似文献
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本文对广元市9个核桃良种的生长表现及坚果经济性状进行了分析。结果表明:(1)广元现有良种具有生长势中等偏强,具备丰产、稳产特性。同时,本地核桃品种多样性丰富,在特色品种开发方面,仍然有较大空间。(2)广元现有良种果形端正,果壳厚薄适中,坚果内褶壁基本退化,隔膜膜质,稀有革质,多数取仁易,出仁率高。在以后的品种推广中,应大力发展蜀朝2号、青川1号、旺核1号等品种果型大、出仁率高、耐储运的良种。(3)根据变异分析得出,三径均值、粗脂肪含量、出仁率变异系数较低,说明这些指标的遗传稳定性较高。(4)单果重、三径、壳厚、出仁率、粗脂肪含量、粗蛋白含量两两之间存在一定的相关性。这些相关性结果对于研究区域内核桃性状变异、性状指标间变化规律具有一定的指导意义。 相似文献
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Combined production of timber and forage species is considered to be a desirable land-use system to offset some of the current land management problems of Italy. This paper reports the early results of a study on intercropping young plants of walnut with alfalfa (Medicago sativa L.), with or without polyethylene mulching, in an experimental plantation in central Italy. Two genotypes of walnut were used:Juglans regia L. and the French hybrid NG23×RA. The seasonal changes of absolute and relative growth rates of walnut stem diameter and apical shoot length were investigated.During both growing seasons, alfalfa intercropping strongly decreased walnut growth, whereas polyethylene mulching promoted stem height and diameter growth. Stem growth of intercropped-and-mulched walnut was the same as that of sole walnut under clean cultivation management. The use of polyethylene mulching reduced or avoided the competitive effect of associated alfalfa on walnut growth. During both growing seasons, the intercropped-and-mulched walnut had higher relative growth rates than intercropped-unmulched walnut. The results show the effectiveness of polyethylene mulching in promoting early growth of walnut, even when intercropped with alfalfa during early stages of plantation establishment. 相似文献
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Pestofotiopsis sp．感染核桃引发的真菌病害是影响大理州核桃产业发展的主要真菌病害类型。经过连续3年的化学防治试验,结果表明用10％苯醚甲环唑可分散粒剂1500倍液和腈菌唑5％高渗乳油2000倍液对Pesta-lotiopsissp．为害的枝、叶、果均可取得良好的防治效果,二者差异不显著;70％甲基托布津粉剂1000倍液仅对果实病害的防治有明显效果,对枝、叶的防治效果则较差。 相似文献
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We determined the influence of the triazole derivatives paclobutrazol, penconazole, epixiconazole, propiconazole and myclobutanil on the drought tolerance and post drought recovery of container-grown horse chestnut (Aesculus hippocastanum L.) saplings. Myclobutanil neither conferred drought resistance, as assessed by its effects on a number of physiological and biochemical parameters, nor affected growth parameters measured after recovery from drought. Chlorophyll fluorescence (F(v)/F(m)), photosynthetic rates, total foliar chlorophyll and carotenoid concentrations, foliar proline concentration and superoxide dismutase and catalase activities were consistently higher and leaf necrosis and cellular electrolyte leakage was lower at the end of a 3-week drought in trees treated with paclobutrazol, penconazole, epixiconazole or propiconazole than in control trees. Twelve weeks after drought treatment, leaf area and shoot, root and total plant dry masses were greater in triazole-treated trees than in control trees with the exception of those treated with myclobutanil. In a separate study, trees were subjected to a 2-week drought and then sprayed with paclobutrazol, penconazole, epixiconazole, propiconazole or myclobutanil. Chlorophyll fluorescence, photosynthetic rate, foliar chlorophyll concentration and catalase activity over the following 12 weeks were 20 to 50% higher in triazole-treated trees than in control trees. At the end of the 12-week recovery period, leaf area and shoot, root and total plant dry masses were higher in triazole-treated trees than in control trees, with the exception of trees treated with myclobutanil. Application of triazole derivatives, with the exception of myclobutanil, enhanced tolerance to prolonged drought and, when applied after a 2-week drought, hastened recovery from drought. The magnitude of treatment effects was in the order epixiconazole approximately propiconazole > penconazole > paclobutrazol > myclobutanil. 相似文献