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威根龙膨大素是根据甜菜营养需求规律而研制出的一种专用型叶面施。田间试验结果表明,甜菜叶面喷施威根龙膨大素后能促进块根的生长发育,根粗和单根重增加,产量比对照和多效唑处理分别提高23.4%和6.9%,含糖分别提高2.25度和1.74度,品质得到明显改善。 相似文献
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多效唑是八十年代初研制成功的新型植物生长调节剂。它能抑制植物体的内源赤霉素合成,削弱细胞分裂和伸长。有研究表明,杂交连晚秧苗喷多效唑,具有促进分蘖、降低株高、增穗增粒、提高产量的作用。为了探明喷施多效唑对杂交早稻秧苗素质和产量的影响,1987年我们在浙江省兰溪市张坑乡的培泥沙田进行了叶面喷施试验,现将结果整理如下。 一、材料与方法 供试品种为威优35和威优634,3月26日播种,播种量14~15公斤/亩, 4月6日出苗, 4月 20 日.揭膜时( 3叶 1心)喷施多效唑(江苏省建湖农药厂生产的粉剂)300ppm药液100公斤/亩。喷药前排干秧板水,2小… 相似文献
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马铃薯叶面喷施植物生长调节剂对植株和产量的影响 总被引:1,自引:0,他引:1
通过对马铃薯叶面喷施不同浓度植物生长调节剂(多效唑)和微量元素,研究不同浓度多效唑和微量元素配合喷施对马铃薯叶绿素含量、光合速率、淀粉含量、产量等的影响。结果表明,不同浓度多效唑和微量元素配合使用,可使马铃薯顶端生长受到明显抑制,茎粗增加,叶绿素含量增加,光合速率增加到一定程度有所下降。淀粉含量随着浓度增加而增加,到一定程度也有下降的趋势。 相似文献
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烯效唑不同使用方式对水稻秧苗控长促蘖效应及其增产效果 总被引:3,自引:0,他引:3
烯效唑是一种新型植物生长调节剂,其生物学效应类同于多效唑,但烯效唑具有活性强、用量少、残留期短、使用方便等优点。近年来,烯效哩已在各地推广应用。为了探索其最佳使用效果,我们于1994~1996年在浙江金华县曹宅、罗埠、蒋堂等地进行了不同使用方式及浓度等方面的试验研究。主要结果如下。(-)试验设计与方法设药液浸种和叶面喷施两种方法,叶面喷施分别在秧苗期(二叶一心)和齐穗期进行。早稻品种为二九丰或威代4O2,晚稻品种为协代46。烯效哇系江苏省张家港联合化工厂生产的5%烯效哩超微可湿性粉剂。早稻浸种处理的浓度及时… 相似文献
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【目的】探讨柿树矮化密植、早果丰产技术。【方法】于柿树生长期喷施不同浓度的多效唑(pp333),分析多效唑对金柿产量及生长发育的影响。【结果】叶面喷施多效唑对金柿平均单株产量、坐果率、果枝率、成枝率均有显著影响。多效唑可极显著地抑制其营养生长,促进坐果,提高产量。其中以800mg/kg处理浓度效果最佳。【结论】喷施浓度800mg/kg多效唑可以有效抑制金柿营养生长,提高产量。 相似文献
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密肥条件对水稻氮素吸收和产量形成的影响 总被引:65,自引:1,他引:64
以迟熟中粳稻9516和杂交中籼稻汕优63为材料,研究不同栽插密度(行距)和施氮量对水稻氮素吸收、产量形成的影响。结果表明,成熟期植株总吸氮量和穗部吸氮量随施氮量的增加而增加,但穗部吸氮量占总吸氮量的比例呈下降趋势,栽插行距不同总吸氮量有差异。不同处理抽穗期群体总颖花量、植株吸氮量变化幅度较大,抽穗期单位氮素相对产颖花能力变化幅度较小,因而可以根据预期产量指标的颖花量和不同地力单位氮素相对产颖花能力,计算得出抽穗期相对吸氮量,并除以抽穗期氮肥利用效率,就可较确切地算出水稻的施氮量,为生产上定量施肥提供理论依据。 相似文献
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多效唑对水稻的生物效应及其应用 总被引:6,自引:2,他引:6
多效唑(Multi-Effect Triazole,MET)是一种新型植物生长延缓物质,对水稻(Oryza sativa L.)生长有明显的控制作用,主要表现于减缓稻苗生长速度和抑制节间伸长;其伴生效应有:促进秧苗分蘖与根系生长,减轻水稻移栽后败苗,增进稻株本田期早发增蘖以及防止水稻成熟期间倒伏。可应用于控制连作晚稻秧苗徒长,调节稻作茬口安排;以及减轻因倒伏引起的产量与品质的下降。多效唑对水稻生长的控制效应受气温、氮素施用量以及土壤水分影响;多效唑具有增强气孔抗阻、降低叶面蒸腾等生理作用,并增强稻苗吲哚乙酸氧化酶活性。 相似文献
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经过4a不同土壤对产量及米质影响的盆栽试验表明:砂土千粒重高,但有效穗数和穗粒数过少,产量最低。白浆土有效穗数、穗粒数及千粒重都保持较高水平,产量最高比砂土增产22.5%。草炭土有效穗数和穗粒数较多,但千粒重低于白浆土,比砂土增产16.6%;盐碱土穗粒数虽然多,但有效穗数少,千粒重最低,比砂土增产14.2%。白浆土的出米率最高,垩白最少,直链淀粉含量最低,蛋白质含量居第2位,所以白浆土是生产优质米最好的土壤。砂土的各项指标除直链淀粉含量最高外,其他指标都居第2位。草炭土的所有指标都居第3位。盐碱土的所有指标都最差,不适合优质米生产。 相似文献
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The detrimental effects of submergence on physiological performances of some rice varieties with special references to carbohydrate metabolisms and their allied enzymes during post-flowering stages have been documented and clarified in the present investigation. It was found that photosynthetic rate and concomitant translocation of sugars into the panicles were both related to the yield. The detrimental effects of the complete submergence were recorded in generation of sucrose, starch, sucrose phosphate synthase and phosphorylase activity in the developing panicles of the plants as compared to those under normal or control (i.e. non-submerged) condition. The accumulation of starch was significantly lower in plants under submergence and that was correlated with ADP-glucose pyrophosphorylase activity. Photosynthetic rate was most affected under submergence in varying days of post-flowering and was also related to the down regulation of Ribulose bisphosphate carboxylase activity. However, under normal or control condition, there recorded a steady maintenance of photosynthetic rate at the post-flowering stages and significantly higher values of Ribulose bisphosphate carboxylase activity. Still, photosynthetic rate of the plants under both control and submerged conditions had hardly any significant correlation with sugar accumulation and other enzymes of carbohydrate metabolism like invertase with grain yield. Finally, plants under submergence suffered significant loss of yield by poor grain filling which was related to impeded carbohydrate metabolism in the tissues. It is evident that loss of yield under submergence is attributed both by lower sink size or sink capacity (number of panicles, in this case) as well as subdued carbohydrate metabolism in plants and its subsequent partitioning into the grains. 相似文献
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The effect of defoliation upon yield, flowering and vegetative spread of Holcus lanatus growing with and without Lolium perenne 总被引:1,自引:0,他引:1
Plants of Holcus lanatus L. and Lolium perenne L. were grown in monocultures and in 50:50 mixtures and cut at three heights and at three frequencies during 24 weeks. The higher the H. lanatus plants were cut the greater was their harvested yield but height of cutting did not affect the yield of L. perenne. Reduction in the frequency of cutting increased the total harvested yield of both species in monoculture. In mixture, H. lanatus dominated L. perenne , especially with high and infrequent cutting. Stubble yields generally followed harvested yields.
In a second experiment, H. lanatus plants were cut sequentially in spring; plants cut in early June produced very few panicles in the regrowth.
In a third experiment the growth of decumbent tillers in late summer on spaced plants of H. lanatus produced a stoloniferous growth habit. The production of lateral shoots and roots on these stolons was measured in spring on plants undergoing various types of defoliation. Regular cutting of the parent plant increased the production of lateral shoots on stolons but did not affect the production of lateral roots.
The significance of these results is discussed in relation to the manipulation of swards containing these two species. 相似文献
In a second experiment, H. lanatus plants were cut sequentially in spring; plants cut in early June produced very few panicles in the regrowth.
In a third experiment the growth of decumbent tillers in late summer on spaced plants of H. lanatus produced a stoloniferous growth habit. The production of lateral shoots and roots on these stolons was measured in spring on plants undergoing various types of defoliation. Regular cutting of the parent plant increased the production of lateral shoots on stolons but did not affect the production of lateral roots.
The significance of these results is discussed in relation to the manipulation of swards containing these two species. 相似文献
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近年来辽宁省玉米品种试验的初步分析 总被引:2,自引:0,他引:2
通过分析2005年以来辽宁省玉米品种试验结果,表明适当缩短品种生育期可以充分利用自然条件,从而有利于产量的提高;产量随着密度的增加而增加,但现有的参试品种增密空间并不是很大;试验密度范围内中晚熟品种的适宜密度是60 000株/hm2,晚熟品种的适宜密度是52 500株/hm2。参试组合的整体质量反映出优异的育种基础材料匮乏。多抗性和稳产性至关重要,是优良品种得以大面积推广的基础。培育优良品种的基础是完善育种目标、提高光能利用率和增加单位面积有效穗数;通过加大种质扩增和改良以及增加密度压力对育种基础材料进行分类整理,加强熟期相对较短且耐密植材料的积累;提高对品种多抗性及稳产性的认识。 相似文献
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研究汕优63不同带蘖秧苗的结实性状及相互关系,表明旱育稀植水稻的结实性状与单株带蘖数呈二次曲线关系,与单株成穗数亦呈二次曲线关系,以单株带蘖2~3个、成穗8~9个秧苗综合性状好,产量高 相似文献
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大田直播条件下,研究了壮芽灵浸种对三系杂交水稻德香4103群体结构和产量的影响。结果表明:(1)壮芽灵浸种可以显著提高稻种的发芽势,但发芽率提高不显著;(2)壮芽灵浸种可以缩短从始苗到全苗的时间2 d,在播种量相同的条件下,基本苗和出苗率得到显著提高,基本苗从56.67万株/hm^2提高到68.89万株/hm^2,出苗率从75%提高到91%;(3)壮芽灵浸种可以显著提高群体最高苗数和成穗率,最高苗从573.33万/hm^2提高到612.22万/hm^2,成穗率从44%提高到47%;(4)壮芽灵浸种后有效穗数、结实率、千粒重显著提高,增产达7.70%。 相似文献