苗龄和营养面积及化学调控对青花菜秧苗质量的影响

发布时间：2018-05-15 05:18

本文选题：青花菜 + 工厂化育苗　；参考：《沈阳农业大学》2017年硕士论文

【摘要】：在北方地区,因塑料大棚和日光温室的使用面积逐渐增加,秧苗的需求量也增加,同时应运而生了一些突出问题。出于育苗成本及环境因素的考虑,青花菜育苗难的现象普遍存在,若遇到连续阴雨、高温和湿度大的天气状况,青花菜秧苗下胚轴易发生徒长现象;因苗龄和营养面积的关联性,苗龄大,营养面积养分供应不足,从而造成秧苗质量下降。合理的化学调控和适合的营养面积是解决秧苗徒长问题的基本。本文以"奥绿二号"为试材,旨在研究应用植物生长调节剂控制青花菜秧苗徒长和培育壮苗提供理论依据。1.青花菜秧苗营养面积和苗龄对其生长发育的影响。本实验研究表明,以"奥绿二号"为试材,采用72、105、128孔数的三种规格穴盘,设置大、中、小(25天、30天、35天)三个苗龄阶段,本实验旨在研究不同处理对青花菜秧苗生长的影响,筛选出与苗龄相适合的穴盘规格。试验表明,不同孔数代表恒定的面积,为其生长发育提供养分供应。即营养面积和苗龄对青花菜秧苗生长发育的影响,表现随着营养面积的增加,营养面积对植物抑制作用加强。因此,即要考虑植物营养面积的需求,又要考虑市场的需求,以便达到经济效益与质量之间的平衡。实验表明在青花菜育苗时期,在小苗龄阶段使用128孔穴盘,在中苗龄时期使用105孔穴盘,在大苗龄时期使用72孔穴盘。2.青花菜秧苗化学调控技术。随着浓度的变化,底水浇灌不同浓度矮壮素和缩节胺,在农艺性状方面,株株的高度为降低趋势,茎粗、全株干鲜重和叶面积、G值、根冠比、壮苗指数等方面均为增加趋势。说明在浇灌初期开始抑制地上部分的生长,促进根部的生长,在幼苗生长后期,根部聚集的营养物质开始先地上部分运输,在激素作用下,促进茎的横向生长。集聚更多光合产物,在生理生化方面,根系活力得到增强,增强酶活性,从而起到了壮苗作用。本试验可知,在一定浓度范围内,随着生长抑制剂浓度的变化,当矮壮素浓度达到400mg/L,缩节胺为75mg/L时,幼苗各项指标处理效果最好,就青花菜秧苗产量而言,与对照相比,产量有所增加。
[Abstract]:In northern China, because of the increasing area of plastic greenhouse and solar greenhouse, the demand for seedlings is also increasing, and some outstanding problems have emerged. Considering the cost of seedling and environmental factors, the phenomenon of difficult seedling raising of broccoli is common. If the weather conditions of continuous rain, high temperature and high humidity, the hypocotyls of broccoli seedling are easy to grow in vain; Because of the correlation between seedling age and nutrient area, the seedling age is large, the nutrient supply of nutrient area is insufficient, and the quality of seedling is decreased. Reasonable chemical regulation and suitable nutrient area are the basic to solve the problem of seedling growth. The purpose of this paper is to study the application of plant growth regulators to control the growth of broccoli seedlings and to provide a theoretical basis for the cultivation of strong seedlings. Effects of vegetative area and seedling age of broccoli seedlings on their growth and development. The experiment results showed that the three stages of seedling age of "Oro Lv 2" were set up with three kinds of holes with 72105128 hole number (large, medium, 25 days, 30 days and 35 days). The purpose of this experiment was to study the effects of different treatments on the growth of broccoli seedlings. The size of hole plate suitable for seedling age was screened out. The results showed that the different pore numbers represented a constant area and provided nutrient supply for their growth and development. The effect of vegetative area and seedling age on the growth and development of broccoli seedlings showed that with the increase of vegetative area, the inhibition of vegetative area on plants was strengthened. Therefore, it is necessary to consider the demand of vegetative area and the demand of market so as to achieve the balance between economic benefit and quality. The experimental results showed that 128-hole disc was used in young seedling stage, 105-hole disc in middle seedling stage, and 72-hole disc in big seedling stage. Techniques of chemical control of cauliflower seedlings. With the change of concentration, the height of plant was decreased, stem diameter, fresh weight of whole plant, leaf area G value, ratio of root to shoot, seedling index and so on. In the early stage of irrigation, the growth of the aboveground part was inhibited and the growth of the root was promoted. At the late stage of seedling growth, the nutrient accumulated in the root began to transport first above the ground, and under the action of hormone, the lateral growth of the stem was promoted. Accumulation of more photosynthetic products, in physiological and biochemical aspects, root activity was enhanced, enhanced enzyme activity, thus played a strong role in seedling. In this experiment, with the change of growth inhibitor concentration in a certain concentration range, when the dwarf concentration reached 400 mg / L and the node amine was 75mg/L, the treatment effect of each index of the seedling was the best. Compared with the control, the yield of broccoli seedling was higher than that of the control. Output has increased.
【学位授予单位】：沈阳农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S635.3

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