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脱毒甘薯组培苗水培营养液配方筛选 总被引：2，自引：0，他引：2
采用水培方法,研究了4种营养液配方:MS营养液大量元素配方(Ⅰ),霍格兰和阿农营养液通用配方1938年(Ⅱ),循环水生菜营养液配方(Ⅲ),MS营养液大量元素调整配方(Ⅳ)对脱毒甘薯组培苗的影响.试验结果表明,处理Ⅱ脱毒甘薯的地上部鲜质量和干质量、根鲜质量和干质量、枝长、每一枝条节数均为最大.处理Ⅱ与处理Ⅲ、Ⅳ相比,地上部鲜质量分别提高4.1,25.1倍.干质量分别高4.6,10.4倍;根鲜质量分别高4.4,17.8倍,根干质量分别高3.5,11.4倍,枝长分别高1.2,2.9倍,每一枝条节数分别高0.4,1.0倍,除与处理Ⅲ的每一枝条节数外,以上差异均达显著水平.霍格兰和阿农营养液通用配方1938年是水培繁殖脱毒甘薯种苗的适宜配方. 相似文献
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以生菜为试材,在人工光环境条件下进行水培试验,在不同营养液浓度(山崎营养液配方0.8、1.0、1.2倍)和不同光照强度(80、130、180μmol·m~(-2)·s~(-1))处理组合下,测定了收获期生菜的产量和维生素C、硝酸盐、可溶性蛋白质以及可溶性糖等品质指标,研究了营养液浓度与光照强度处理组合对水培生菜产量和品质的影响。结果表明:1.0倍营养液与180μmol·m~(-2)·s~(-1)光照强度处理下生菜地上鲜质量最大、硝酸盐含量最低;1.2倍营养液与180μmol·m~(-2)·s~(-1)光照强度处理下生菜的可溶性糖含量最高;1.0倍营养液与130μmol·m~(-2)·s~(-1)光照强度处理下生菜的可溶性蛋白质、维生素C含量最高。综合考虑,1.0倍营养液与180μmol·m~(-2)·s~(-1)光照强度处理为水培生菜最佳处理。 相似文献
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为明确不同营养液配方对娃娃菜育苗的影响,以四季、金娃娃和红芯娃娃菜为试验材料,研究了园试配方、荷兰配方和霍格兰德配方娃娃菜苗期各生长指标和营养品质的差异。结果表明,园试配方可以促进娃娃菜根系的生长,根系长达17.33 cm,分别是荷兰配方与霍格兰德配方下娃娃菜根长的1.49倍和1.60倍;霍格兰德配方下娃娃菜的叶长、叶宽、叶片数、株高、茎粗、根鲜质量、茎叶鲜质量最高,分别为6.99 cm、4.31 cm、6.44片、10.93 cm、2.06 cm、2.56 g、25.94 g,说明霍格兰德配方可明显促进娃娃菜地上部形态的发育。经二因素方差分析,荷兰配方下娃娃菜的维生素C含量极显著高于其他营养液配方;园试配方下娃娃菜的可溶性糖含量和叶绿素含量均极显著高于其他营养液配方。金娃娃的叶长、叶宽、叶片数、株高、茎粗、根鲜质量、茎叶鲜质量均高于其他2个娃娃菜品种,分别为7.57 cm、4.83 cm、7.22片、10.66 cm、2.22 cm、2.99 g、32.33 g;且其维生素C含量、可溶性糖含量以及叶绿素含量均优于其他2个娃娃菜品种。测定了12个生长和生理指标,采用隶属函数法综合分析,... 相似文献
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不同浓度液体肥对生菜生长及品质的影响 总被引：1，自引：0，他引：1
以意大利耐抽薹生菜为材料,采用体积比1∶1∶1的泥炭、椰糠、珍珠岩为栽培基质,在无土栽培条件下,研究不同浓度液体肥对生菜生长及品质的影响。结果表明:与完全营养液(CK)对比,稀释倍数为300倍(T_1)、600倍(T_2)和900倍(T_3)的液体肥均对生菜生长有不同程度的促进作用;稀释倍数为600倍和900倍的肥料能显著提高生菜地上部鲜质量、地上部干质量、最大叶片宽、叶绿素含量、可溶性总糖含量,且处理间差异不显著。推荐选用稀释倍数为600～900倍的液体肥代替完全营养液用于基质培生菜生产。 相似文献
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摘要：为探明缺钾生菜外形正常而生长缓慢的原因，研究了不同程度钾缺乏对生菜的影响。以“巴达维亚”生菜为材料，通过营养液量的管理方法，设置4个梯度的钾供给量，分别为常规用量对照组以及1/2、1/4、1/8钾供给量，分析钾缺乏处理下生菜叶片的钾含量和可溶性糖含量以及光合作用的变化。结果表明：1/2和1/4处理中生菜的净光合速率、气孔导度、胞间二氧化碳浓度和蒸腾速率与CK相比均无显著差异，1/8处理则均较CK显著降低。1/2、1/4、1/8处理下生菜内、外叶片钾含量均逐渐降低，可溶性糖含量均逐渐上升；随着叶片钾含量的降低，外、内叶钾含量比值和外、内叶可溶性糖含量比值均有所上升，这表明生菜在遭受钾缺乏时，将更多功能性物质分配于外叶以维持其正常功能，而内叶由于分配较少导致生长缓慢。 相似文献
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为了抑制夏季高温造成的水培快菜细菌性病害的发生，以京研快菜4号为试材，采用在循环营养液中通入臭氧曝气的方式，研究不同频次臭氧消毒对快菜细菌性病害的抑制作用以及对产量和品质的影响。结果表明：随着通入臭氧频次的增加，营养液中细菌含量显著降低，快菜软腐病发病率也逐渐降低；不同频次臭氧处理均明显降低了营养液中的微生物种类。向营养液中通入臭氧对快菜植株生长和品质改善有促进作用，其中T2（每3 d通1次，每次10 min）处理的综合效果最优，快菜地上部鲜质量和干质量、可溶性糖含量、可溶性蛋白含量均显著高于对照。 相似文献
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《中国瓜菜》2019,(10):55-59
采用耐切割叶用莴苣品种‘奶油生菜’为试材,以海南夏季锯齿型温室内自然光照和光周期为对照,利用LED精量调制红蓝光比例分别为R/B=4、8、10,对水培生菜切割一茬后的再生苗进行夜间延时补光,探究不同光质LED暗期补光对水培切割再生生菜生长和生理的影响。结果表明:R/B=8、10两个处理的再生生菜采收时单株地上部鲜质量达到对照的2.36、2.13倍,随着LED红蓝复合补光光源红光比例的增加,生菜地上部鲜质量和可溶性蛋白含量呈现先增加后减小、可溶性糖含量持续增加的趋势。光合色素以R/B=10的含量最高,叶绿素荧光指标R/B=8、10处理高于CK和R/B=4处理。R/B=8处理的脯氨酸、SOD酶含量极显著或显著高于其他3个处理,EC值、MDA含量表现出R/B=4处理显著低于CK。综合各指标来看,对水培生菜再生苗进行暗期延时补光处理时,R/B=8是最优的光质配比。 相似文献
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以香港玻璃脆生菜为试材,在日本山崎配方中添加6种不同浓度的腐植酸,处理后每10d测定生菜的产量、水分消耗量及营养液中主要矿质元素含量,以研究腐植酸对水培生菜生长及矿质元素吸收的影响。结果表明:腐植酸浓度在0~1.41mg·g~(-1)内随着腐植酸浓度的增加,生菜地上部和地下部鲜干质量随之增加,腐植酸浓度为1.41mg·g~(-1)时,上述指标同时达到最大。腐植酸对营养液的酸碱度有缓冲作用。腐植酸浓度在0~1.41mg·g~(-1)内,随着其浓度的增加,生菜水分利用效率逐渐增大,对矿质元素的利用效率逐渐提高。腐植酸对生菜吸收矿质元素的影响不显著,不同的腐植酸处理,生菜吸收无机养分的能力不同。综合产量和矿质元素利用等因素,添加1.41mg·g~(-1)的腐植酸可达到高产、节水、省肥的生产效应。 相似文献
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以甜瓜品种西州蜜25 号为试材，以草炭、蛭石、珍珠岩（体积比2∶1∶1）为基础基质，将2 倍或4 倍Hoagland 营养液、
保水剂、枯草芽孢杆菌等混配成不同复合功能性基质，探究营养液浓度、保水剂和枯草芽孢杆菌混配对甜瓜生长发育及果实
品质的影响。结果表明，与仅添加2 倍和4 倍营养液肥料的处理（T1、T5）相比，营养液、保水剂和枯草芽孢杆菌三者混
配的基质（T4、T8）均可显著增加甜瓜植株的生物量，提高叶片叶绿素含量、光合作用和单果质量，促进果实可溶性蛋白
和可溶性糖含量积累，降低果实硝态氮和可滴定酸含量。由多因素方差分析结果可以看出，保水剂对增加叶片叶绿素含量、
提高水分利用效率、增加单果质量和果实可溶性糖含量、降低硝态氮含量效果最明显；枯草芽孢杆菌对增加植株生物量、促
进光合作用、提高果实可溶性蛋白及降低可滴定酸含量效果最明显。所有处理中，4 倍营养液条件下与保水剂和枯草芽孢杆
菌混配（T8）的处理效果最优。为此，在甜瓜基质栽培生产中，推荐选用以草炭、蛭石、珍珠岩（体积比2∶1∶1）为基质，
混配含有4 倍营养液、保水剂（8 mL · L-1）和枯草芽孢杆菌（2 g · L-1）的复合功能性基质。 相似文献
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营养液EC值对无土栽培番茄果实发育及蔗糖代谢的影响 总被引：1，自引：0，他引：1
以番茄栽培品种‘辽园多丽’为试材,在果实发育期通过添加不同浓度的NaCl来提高营养液的EC值,研究高EC值管理对水培番茄果实产量、品质及蔗糖代谢的影响。结果表明:3个高EC值处理都提高了成熟果实中可溶性糖、有机酸和维生素C含量,而且随着EC值的增加这种提高越明显。进一步的分析发现,随着营养液EC值的提高,番茄果实各部位己糖(果糖+葡萄糖)含量增加,蔗糖转化酶(酸性转化酶+中性转化酶)活性增强,而且己糖含量的增加和转化酶活性的增强主要发生在花后40～60d。以上结果表明:果实发育期高EC值管理下番茄果实可溶性糖含量的提高是由于蔗糖转化酶活性的增强引起的;在该试验中EC值1.25→2.5→3.8→5.2的处理果实的品质提高最多,干物重损失最少。 相似文献
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Ipomoea aquatica Forsskal is a fast-growing aquatic economic plant and has been applied widely to purify eutrophic water, but little is known about the edible safety of it for humans or animals. The main purpose of our research was to assess the metal (copper, zinc, lead, cadmium and chromium) concentration and nutritional quality in the edible part of I. aquatica Forsskal (‘Chunbai’ and ‘Liulv’) growing in eutrophic water. The results showed that all levels of these metals were within the acceptable levels in our present studies, and the metal accumulating potential varied mainly depending upon levels of metal contamination in the water body in which they were growing. In the present investigation, nitrate content (NO3–N) had no significant differences between ‘Chunbai’ and ‘Liulv’, but had significant differences (p < 0.001) between eutrophic water and Hoagland nutrient solution. Soluble protein, soluble sugar, and vitamin C content were affected greatly by variety and solution (treatments). The soluble protein and vitamin C content in ‘Liulv’ were one time higher but the soluble sugar content was one time lower than that in ‘Chunbai.’ The soluble protein and soluble sugar of plants cultivated in nutrient solutions were one time lower than that in eutrophic water. In addition, the vitamin C content of plants grown in Hoagland nutrient solution was approximately two times higher than that in eutrophic water. The possible utilization of these aquatic vegetables to meet the demands of food and health perspectives for consumers is discussed. 相似文献
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硫对设施水培大蒜光合特性和鳞茎品质的影响 总被引：6，自引：1，他引：5
在设施条件下,采用营养液培养大蒜,研究不同施硫水平对其光合特性、鳞茎质量及品质的影响。结果表明,在施硫水平0 ~ 2.25 mmol · L-1范围内,光合速率（Pn）、叶绿素含量、气孔导度（Gs）、蒸腾速率（E）和鳞茎质量随施硫量增加而升高,至硫浓度2.25 mmol · L-1时达最高。鳞茎品质指标除可溶性蛋白质外,随植株生长而逐渐升高。在不同硫处理间,鳞茎中大蒜素、可溶性糖和游离氨基酸和蒜薹中大蒜素、可溶性糖、维生素C及游离氨基酸含量均以2.25 mmol · L-1硫处理最高,分别比不施硫处理增加48.82%、127.92%、63.58%、10.61%、63.30%、29.07%和74.16%。营养液中硫含量为3.75 mmol · L-1时,鳞茎中蛋白质含量最高。大蒜二次生长指数在一定硫浓度范围内,随硫水平的升高而降低,而后随施硫量的升高变化不显著。 相似文献
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A.L. GarcÍa R. Madrid N. Nicolás V. >MartÍnez J.A. >Franco 《The Journal of Horticultural Science and Biotechnology》2013,88(4):664-670
SummaryThe effect of different doses of nitrogen on water stress in tomato (Lycopersicon esculentum Mill. ‘Royesta’) plants grown in a sandy soil and exposed, or not, to long-term water stress was studied. Nitrogen dose treatments consisted of Hoagland’s solution (N1 treatment), Hoagland’s solution + 40 mM NO3– (N2 treatment), or Hoagland’s solution + 80 mM NO3– (N3 treatment) applied every 3 d, for a total of seven applications following plant establishment. Subsequently, daily application of 80% (stressed) or 100% (unstressed) of the water evapotranspired by control plants the previous day was combined, factorially, with the three nitrogen treatments, for a period of 2 weeks. The leaf fresh weight (FW) at full turgor:leaf dry weight (DW) ratio was high in plants under the N1 and N3 stress treatments, with no significant difference between them soon after the start and at the end of the water stress treatment. However, the N2 treatment produced a significant increase in the ratio in well-watered plants, but not in water-stressed plants at the end of the stress period. The surface area per leaf was greater in stressed than in control plants, except for N2. Leaf water potential was greatly reduced in stressed N2 and N3 plants, but was unaltered in their well-watered counterparts. The significant increases in relative water content at the turgor loss point (around 3%) and in cell membrane rigidity (an increase of more than 125% in the bulk modulus of elasticity) clearly indicate an osmotic adjustment in stressed N2 plants, confirming that this N dose moderated the effects of the water stress imposed on N2 plants. 相似文献
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以无纺布作栽培基质,设计了一套适用于小型叶菜栽培的水肥一体化轻简栽培系统。以普通白菜品种扬州青1号和高梗白为试材,采用裂区试验设计,研究该栽培模式下不同营养液浓度对普通白菜生长指标和生理指标的影响。结果表明,营养液浓度对普通白菜地上部鲜质量、可溶性糖含量、叶片叶绿素SPAD值均有极显著影响;随着营养液浓度的增加,两个普通白菜品种的地上部鲜质量、可溶性糖含量和叶绿素SPAD值均呈现先增加后降低的趋势,根系丙二醛含量则呈现先降低后升高的趋势;125%全价营养液处理有利于提高普通白菜地上部鲜质量、可溶性糖含量和叶片叶绿素SPAD值,并保持根系较低的丙二醛含量。 相似文献
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One-year-old scale bulblets of Lilium longiflorum Thunb. ‘Nellie White’ (Easter lily) were grown under a combination of six constant day/night temperature regimes and five N–P–K nutrient treatments under short days for 107 d (growing period 1 or GP-1) to compare the effects on growth and development and bulb production. Results during GP-1 were as follows: failure of bulblets to produce a shoot (“no-shows”) was found at high temperatures (30/26 and 26/22 °C) and not influenced by the nutrient treatments. Flower bud abortion was observed in the minus-N, minus-P, and minus-N–P–K treatments at high temperatures (30/26 or 26/22 °C), but not observed at any temperatures in the complete and minus-K treatments. The loss of bulb fresh weight in minus-N treated bulblets was less than in the other treatments resulting in less root and shoot growth in the minus-N treatment. At the intermediate temperatures where growth was highest, omission of N, P, K, or all three resulted in losses in stem bulb fresh weight, stem plus leaf fresh weight, number of flowers, and stem root fresh weight. Omission of N, P, or all three nutrients resulted in lowest basal root fresh weight. Bulb N and K concentrations were lowest in plants grown with complete nutrient solution at the two coldest temperature regimes (14/10 and 10/6 °C). Bulb P concentration was lowest at the three coldest (18/14, 14/10 and 10/6 °C) and the warmest (30/26 °C) temperature regimes. Stem length was shorter when P was omitted. Omission of any of the three nutrients resulted in lower concentrations of the other nutrients. The one exception was where low K did not affect N concentration. In the second phase of the experiment, plants grown at 18/14 °C and irrigated with the complete nutrient solution for 107 d (GP-1) were continued at this day/night temperature regime and five N–P–K nutrient treatments for another 89 d under long days (growing period 2 or GP-2). Results during GP-2 were as follows. Basal bulb yield was not impacted by omission of N, P, or K, or all three. Of all growth measurements, only stem plus leaf fresh weight was lower and only when all three nutrients (minus-N–P–K) were omitted. At the end of GP-2, basal bulb concentrations of N and P did not differ from the concentrations in bulbs at the beginning of GP-1; however, K concentration was lower at the end of GP-2. Omission of N or P further resulted in lower bulb K concentration, suggesting that a moderate supply of N, P, and K be applied during GP-2 since an additional year of bulb production is needed to produce forcing-sized bulbs. 相似文献