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土施和叶面喷施PP333每株有效成分1mg或1.5mg,都明显地减少了砂培条件下杜梨实生苗的营养生长,缩短了节间长度,减少了地上部鲜重和干重、总叶片鲜重、总叶面积和总叶片数,增加了根冠鲜重和干重比。土施还抑制了主根生长,增加了吸收根的粗度、吸收根和侧根占根总鲜重的比例。处理后10天,即表现出明显的抑制作用,有效期约30～45天,有效期的长短与施入量有关,施用量较多,有效期较长。 在田间条件下用PP333处理7年生鸭梨树,春季叶面喷施125ppm或250ppm三次,明显地减少了当年春梢的延长生长,缩短了节间长度,但对当年二次梢和翌年春梢、二次梢生长无明显影响。秋季和早春土施每cm~2主干横截面积77.5mg或155mg有效成分,对当年春梢影响较小,但强烈地抑制了当年二次梢和翌年春梢、二次梢的生长。土施和叶面喷施都明显地增加了翌年的开花数量和产量。土施影响了果实形状,使果柄处的突起消失,同时减弱了果柄的肉质化。 相似文献
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1988年对生长在砂壤土上的4年生巨蜂葡萄进行PP333施用试验:①萌芽时按每株0.5g、1g、2g和4g剂量施用于根际附近;②第7～8片叶展开时以250、500、1000和2000ppm浓度喷洒地上部;③喷清水对照。单株小区,重复8次。 结果无论是叶面喷洒还是土壤施用PP333,都明显抑制新梢旺盛生长,使座果率大幅度提高。由于座果率提高。使果穗紧实度增加,果穗重量也相应增加,其中1g土施和1000ppm叶喷处理几乎是对照穗重的两倍,因此明显提高了单株产量。但高浓度的PP333(4g和2000ppm)由于穗粒过多,导致果穗过于紧实、单粒重下降、果形指数变小、糖度降低。根据… 相似文献
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辛酸和PP333对海桐的化学修剪和生理效应 总被引：14，自引：1，他引：13
辛酸叶面喷洒处理影响了海桐新梢的生长和侧枝的发生。0.04M和0.1M的辛酸对顶芽无伤害作用,但影响新梢的生长。0.2M和0.27M的辛酸杀死了新梢的顶芽,诱导了侧枝的发生,其中0.27M的辛酸对植株产生严重伤害。2000、4000和6000ppm的PP333处理抑制了新梢的生长。其抑制效果因浓度增加而加大。0.04和0.2M的辛酸与4000ppm的PP333混合处理也强烈抑制了新梢生长。PP333处理以及PP333和辛酸混合处理可长期保持植株的造型。 辛酸处理的植株在处理后第二年可恢复正常生长,4000、6000ppm的PP333以及0.1M、0.2M的辛酸和4000ppm的PP333混合处理的植株在处理后第二年生长仍受到抑制,90％以上的枝条在春季诱导开花,并在夏初结果。 辛酸和PP333处理改变了海桐茎尖过氧化物酶的活性,处理的植株酶活 性的增加和减少与新梢或侧枝的伸长生长呈相反趋势。 相似文献
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花后对“元帅”苹果进行1500和3000ppm的 PP333叶面喷施处理,增加了采收时的果肉硬度,但减少了种子数和果实体积。叶面喷施对第2年的开花无影响,且使座果率有所增加。据观察,高比率的 PP333处理还使顶生枝梢生长、叶片大小、果实纵横径比率、果实体 相似文献
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供试山楂品种为大金星,4年生。 叶面喷布处理设500和1000ppm两个浓度,以喷清水作对照。喷布时期设5月30日、6月15日、6月30日和7月15日。土壤处理为每株树盘内施药2克,以不施药作对照;处理时期设5月30日、6月30日和7月30日。 结果:①叶面喷布或土壤施用pp333对山楂幼树新稍生长和干周增粗均有强烈抑制作用;②叶面喷布500ppm比100 0ppm作用明显,③叶面喷布时期以5月3 0日比6月30日作用明显,而土壤施用6月30日比5月30日作用明显。PP_(333)对山楂幼树抑生长的作用@朱祥文$江苏省宿迁市果树站… 相似文献
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1985～1988年对砀山酥梨叶面喷布1000～6000ppmPP333处理,结果均能显著地抑制新梢生长,节间变短,节间数目变少;而单叶面积和比叶重变化不大,叶绿素含量和叶片中的总糖、可溶性糖增高。PP333使幼树花芽形成率、单枝座果数均有提高,但随喷布浓度的增大,抑制生长效应增强,而成花率和花朵座果率在处理间的差异随之减小,因而喷施PP333应选择最佳浓度,如果施用浓度太大,抑制强烈。还有可能使总体营养面积减小,形成“小老树”。试验表明,对于刚进入 结果期的砀山酥梨幼树,在盛花后2～5周叶而喷布2000ppm的PP333效果较好。PP_(333)对砀山酥梨生… 相似文献
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<正> 于花后喷布1500或3000ppm PP333,可增加Gardiner Delicious苹果果实的硬度,但减少了采收时果实大小和种子数。对第二年开花无影响,增加了座果。同时还观察到植株顶端生长、叶片大小、果形指数、果实大小、叶柄长度和可溶性固形 相似文献
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本试验研究了植物生长抑制剂对中华猕猴桃(Actinidia chinensis Planch.)幼旺树生长与结果的生物学效应。试验结果表明:猕猴桃幼旺树从当年新梢速长前期(4月下旬～5月上旬)开始,喷布2000ppm B9两次;2000ppm PP333两次;2000ppmB9+500ppmCEPA两次;或2000ppm PP333+500ppm CEPA两次,均能有效地控制猕猴桃幼旺树的营养生长,促进花芽分化,增加产量。可供猕猴桃生产参考应用。 相似文献
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由浙江农业大学园艺系副教授李三玉主持和黄岩市、衢县等有关单位协作的一项科研新成果——“多效唑(PP333)对柑桔控梢保果作用及其机理研究”,经五年试验研究,已于1989年11月在衢县通过鉴定。 该项研究经在尾张温州蜜柑和椪柑上5年的系统深入试验,证明在柑桔花蕾期(春梢长2～5厘米时),以多效唑作叶面喷布(温州蜜柑500ppm、椪柑1000ppm),能控制春梢,抑制夏梢,促发秋梢;增加花量,提高座果率,增加产量,改进果实品质。效 相似文献
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C. B. S. Rajput Jayant Singh 《The Journal of Horticultural Science and Biotechnology》2013,88(1):173-176
A single foliar application of 2, 4 or 6% urea solution to ber cv Banarasi Karaka just before blooming in September significantly improved shoot growth, leaf number, area and weight, the best results being obtained following treatment with 4 or 6 % solutions. Flower number, fruit set and fruit retention were better in nitrogen-supplied plants. The size of the fruits and yield per tree increased with increasing concentration of urea and the highest yield (61 % greater than control) was recorded following 6 % spray treatment. 相似文献
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郁金香更新鳞茎发育的碳同化物积累与内源激素变化研究 总被引：7，自引：0，他引：7
应用扫描电镜和14C同位素标记技术, 并结合内源激素测定, 考察郁金香更新鳞茎膨大发育与碳同化物积累、分配的关系。结果表明: 在鳞片细胞内观察到明显的淀粉颗粒, 并随鳞茎的发育进程充满整个细胞腔。在盛花期前, 14C同化物主要分配到地上部; 进入叶枯期后14 C同化物以向地下部运输为主,分配比例达66.01% , 其中更新鳞茎中14C同化物的分配占60.85% , 这时14C库活性表现为: 鳞茎>叶片>花茎>根系。在郁金香更新鳞茎发育进程中, 叶片中GA、IAA含量呈下降趋势, ABA含量则不断增高并在盛花期出现峰值, 达65.86 ng·g- 1 FM。比较不同生育期的GA3 /ABA比值, 在发叶期的叶片和盛花期的更新鳞茎中均出现高比值, 表明内源激素的平衡可能是郁金香更新鳞茎发生和发育的调节因子。 相似文献
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以种植在宁夏中卫市香山干旱山区压砂地根龄5 a生的同心圆枣树(行间套种西瓜)为试材,研究了压砂地不同间作模式对土壤含水率、西瓜的根系生长及产量、产值和枣树根系、树体发育及坐果的影响。结果表明:在裸砂地中每667 m~2补水19.3 m~3,压砂地土壤含水率提高约1.7%,西瓜根系向上层区域(砂层0～20 cm)和向下层区域(40～60 cm)的根系共计增加了8.7%,根系数量(剖面0.6 m~2内)增多28%,西瓜产量提高66.0%,产值增加300%。在枣瓜间作模式中,在同样补水栽培管理条件下,枣树8 m行间间作2行和间作3行西瓜,在大于3 kg商品瓜产值(净面积)方面,比裸砂地补水处理产值分别提高5.9%和降低7.3%;间作2行西瓜的枣树比间作3行西瓜的枣树,单株坐果量和单株产量分别增加17.1%、22.6%。 相似文献
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水分胁迫对荔枝幼树根系与梢生长的影响 总被引：7，自引：0，他引：7
以盆栽沙培1年生荔枝空中压条苗为试材,研究了水分胁迫对荔枝幼树根系和梢生长的影响以及二者的相互关系。3个处理为:沙体积含水量为7.5%(严重缺水),15.0%(一般缺水),22.5%(充分供水)。结果表明:水分胁迫严重抑制荔枝幼树地上部分和各级侧根的生长,使地上部枝梢生长严重受阻,叶片数量、平均叶面积、叶片厚度均显著变小;根总干重、侧根长度、根表面积显著减少。水分胁迫下促进须根的生长,须根的长度、根表面积比水分充足时显著增加。水分胁迫时叶片淀粉含量下降,而根系积累更多的淀粉。比较不同处理的根梢比发现,干旱对根系生长的抑制作用比枝梢更显著。 相似文献
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日光温室甜樱桃生长发育节律研究 总被引：4，自引：0，他引：4
甜樱桃在日光温室条件下, 自升温(植株通过休眠后, 揭开草帘让日光透过棚膜射入温室内使温度上升) 开始到开花约30 d , 花期持续10～14 d ; 开花后17～21 d 生理落果; 生理落果至果实着色29～43 d (年度间差异大) ; 着色到成熟约10 d。新梢呈典型“双S 型”生长, 第2 次旺长为补偿性旺长, 强度远大于第1 次, 新梢腋芽大量萌发, 节间较长。新根数量在揭膜后迅速下降, 与枝叶早衰相关, 新梢补偿性生长后又上升, 但强度远不及盖膜阶段。 相似文献
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This research was conducted to determine the changes in the seasonal carbohydrates of annual shoots and growth characteristics of 10 years old ‘Trakya ?lkeren’ grape variety. Grapevines are grafted on 5BB and 5C rootstocks and they were grown in heavy clay soil conditions. In the study, changes of sugar, starch and total carbohydrates were determined from bud burst to dormancy. While sugar, starch and total carbohydrates showed significant differences (P < 0.01) there were no differences between rootstocks. Although sugar, starch and total carbohydrates of shoots decreased from bud burst to blooming, they increased thereafter until vegetative growth stopped. Total carbohydrates of annual shoots have been found to accumulate in period from blooming to harvest. Total and mean leaf area, shoot length and diameter, total chlorophyll and chlorophyll a/b ratio showed significantly variation among rootstocks and phenological stages (P < 0.01). Whereas the highest chlorophyll contents were found in the blooming, it was found at the lowest through to harvest. Overall mean and total leaf area, shoot length and shoot diameter, total chlorophyll content and chlorophyll a/b ratio were significantly higher on 5BB grafted vines. In the study, 5BB rootstocks are found suitable in terms of shoot carbohydrate accumulation and growth characteristics for ‘Trakya ?lkeren’ grape variety. 相似文献
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C. M. Menzel D. W. Turner V. J. Doogan D. R. Simpson 《The Journal of Horticultural Science and Biotechnology》2013,88(3):553-564
SummaryPassionfruit are grown in the tropics and subtropics where mean monthly soil temperatures at 15 cm range from about 10° to 30°C. The choice of rootstock can also influence production with most industries exploiting either the purple (Passiflora edulis f. edulis) or golden passionfruit (P. edulis tflavicarpa). We examined the relationship between shoot and root growth in purple x golden hybrid E-23 grafted onto golden passionfruit seedlings. Growth was manipulated by varying the volume of the soil available to the roots or temperature of the root zone. Shoot and root growth increased as root zone volume increased from 0.3, 1.4, 4, 12 to 24 1. Shoot weight (Ws) was correlated with root weight (WR):WS = 12.697 + 5.272 WR + 0.195 WR2 (r2 = 91%, P<0.001), with the plants allocating a smaller proportion of dry matter to the roots as root weight increased. Differences in shoot growth with pot volume were not due to changes in water or nutrient status. In the temperature experiment, the two critical root zone temperatures at 90% of maximum growth were about 20° and 35° C for vine extension, leaf area, node and leaf production, and 20° and 30°C for flower production. Leaf and stem dry weight were optimal between about 18° and 34°C, while maximum root growth occurred at 38°C. There was a weak relationship between shoot (Ws) and root dry weight (WR): Ws = ?19.346 + 24.500 WR ?1.046 WR2 (r2 = 53%, .P<0.001). Apparently, variations in shoot growth at different soil temperatures cannot be explained solely by differences in root growth. Reduced growth at 10°C was associated with lower chlorophyll concentration, stomatal conductance and net CO2 assimilation, but not lower leaf water potential. The concentration of most nutrients were lower at 10°C than at higher temperatures, but none was outside the range which would be expected to restrict growth. There appears to be a co-ordination of shoot and root growth as the soil volume available for root growth increases, whereas root temperature affects the roots and tops differently. The results of the pot volume experiment demonstrate the importance of rootstock vigour in passionfruit breeding. Productivity would be affected in cool subtropical areas with soil <20°C and in tropical areas with soil >30°C. 相似文献