本文選題：青花菜 + 工廠化育苗��； 參考：《沈陽(yáng)農(nóng)業(yè)大學(xué)》2017年碩士論文

【摘要】：在北方地區(qū),因塑料大棚和日光溫室的使用面積逐漸增加,秧苗的需求量也增加,同時(shí)應(yīng)運(yùn)而生了一些突出問(wèn)題。出于育苗成本及環(huán)境因素的考慮,青花菜育苗難的現(xiàn)象普遍存在,若遇到連續(xù)陰雨、高溫和濕度大的天氣狀況,青花菜秧苗下胚軸易發(fā)生徒長(zhǎng)現(xiàn)象;因苗齡和營(yíng)養(yǎng)面積的關(guān)聯(lián)性,苗齡大,營(yíng)養(yǎng)面積養(yǎng)分供應(yīng)不足,從而造成秧苗質(zhì)量下降。合理的化學(xué)調(diào)控和適合的營(yíng)養(yǎng)面積是解決秧苗徒長(zhǎng)問(wèn)題的基本。本文以"奧綠二號(hào)"為試材,旨在研究應(yīng)用植物生長(zhǎng)調(diào)節(jié)劑控制青花菜秧苗徒長(zhǎng)和培育壯苗提供理論依據(jù)。1.青花菜秧苗營(yíng)養(yǎng)面積和苗齡對(duì)其生長(zhǎng)發(fā)育的影響。本實(shí)驗(yàn)研究表明,以"奧綠二號(hào)"為試材,采用72、105、128孔數(shù)的三種規(guī)格穴盤(pán),設(shè)置大、中、小(25天、30天、35天)三個(gè)苗齡階段,本實(shí)驗(yàn)旨在研究不同處理對(duì)青花菜秧苗生長(zhǎng)的影響,篩選出與苗齡相適合的穴盤(pán)規(guī)格。試驗(yàn)表明,不同孔數(shù)代表恒定的面積,為其生長(zhǎng)發(fā)育提供養(yǎng)分供應(yīng)。即營(yíng)養(yǎng)面積和苗齡對(duì)青花菜秧苗生長(zhǎng)發(fā)育的影響,表現(xiàn)隨著營(yíng)養(yǎng)面積的增加,營(yíng)養(yǎng)面積對(duì)植物抑制作用加強(qiáng)。因此,即要考慮植物營(yíng)養(yǎng)面積的需求,又要考慮市場(chǎng)的需求,以便達(dá)到經(jīng)濟(jì)效益與質(zhì)量之間的平衡。實(shí)驗(yàn)表明在青花菜育苗時(shí)期,在小苗齡階段使用128孔穴盤(pán),在中苗齡時(shí)期使用105孔穴盤(pán),在大苗齡時(shí)期使用72孔穴盤(pán)。2.青花菜秧苗化學(xué)調(diào)控技術(shù)。隨著濃度的變化,底水澆灌不同濃度矮壯素和縮節(jié)胺,在農(nóng)藝性狀方面,株株的高度為降低趨勢(shì),莖粗、全株干鮮重和葉面積、G值、根冠比、壯苗指數(shù)等方面均為增加趨勢(shì)。說(shuō)明在澆灌初期開(kāi)始抑制地上部分的生長(zhǎng),促進(jìn)根部的生長(zhǎng),在幼苗生長(zhǎng)后期,根部聚集的營(yíng)養(yǎng)物質(zhì)開(kāi)始先地上部分運(yùn)輸,在激素作用下,促進(jìn)莖的橫向生長(zhǎng)。集聚更多光合產(chǎn)物,在生理生化方面,根系活力得到增強(qiáng),增強(qiáng)酶活性,從而起到了壯苗作用。本試驗(yàn)可知,在一定濃度范圍內(nèi),隨著生長(zhǎng)抑制劑濃度的變化,當(dāng)矮壯素濃度達(dá)到400mg/L,縮節(jié)胺為75mg/L時(shí),幼苗各項(xiàng)指標(biāo)處理效果最好,就青花菜秧苗產(chǎn)量而言,與對(duì)照相比,產(chǎn)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.
【學(xué)位授予單位】：沈陽(yáng)農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：S635.3

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