本文關(guān)鍵詞： 玉米 自交系 化學(xué)調(diào)控劑 脫水 種子活力　出處：《山東農(nóng)業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：研究化學(xué)調(diào)控劑對玉米自交系成熟期水分和種子活力的影響,對降低玉米成熟期水分含量,減少烘干成本;針對大面積玉米種子生產(chǎn),調(diào)節(jié)玉米成熟期時間,錯期收獲,減少烘干生產(chǎn)線的壓力,擴(kuò)大烘干生產(chǎn)線的服務(wù)面積都有重要的應(yīng)用價值。篩選出能提高種子活力的化學(xué)調(diào)控劑,通過化學(xué)調(diào)控劑提高生產(chǎn)種子活力,從而提高種子質(zhì)量。本研究期望通過對玉米自交系噴施化學(xué)調(diào)控劑,篩選出合適的化學(xué)調(diào)控劑、噴施時期、噴施濃度,為種子公司生產(chǎn)玉米種子服務(wù)。本研究用玉米自交系鄭58、自交系PH6WC為試驗材料,選擇的化學(xué)調(diào)控劑是DA6(胺鮮酯)、DA6+油菜素內(nèi)酯、DA6+乙烯利、DCPTA(縮節(jié)胺)、草甘膦,設(shè)置3個不同濃度和4個處理時期,研究化學(xué)調(diào)控劑對自交系成熟期水分、子粒百粒重、子�；瘜W(xué)成分、種子活力的影響。取得結(jié)果如下:DA6對降低玉米成熟期的水分不同地區(qū)和不同材料反應(yīng)不同。在甘肅,自交系花后40天,PH6WC用2.667g/L濃度處理效果最好,水分較對照下降達(dá)10.058%;鄭58用8.001g/L濃度處理效果最好,水分較對照下降達(dá)6.934%。在山東,鄭58在花后35天,用2.667g/L濃度處理效果最好,水分較對照下降達(dá)9.485%。DA6對玉米百粒重的影響不同地區(qū)和不同材料反應(yīng)不同。在甘肅,處理對PH6WC的百粒重影響不明顯;鄭58在花后40天,用2.667g/L濃度處理效果最好,較對照百粒重提高幅度最大值6.761%。在山東,處理對鄭58的百粒重影響不明顯。DA6處理顯著影響玉米化學(xué)成分。DA6能夠降低子粒淀粉含量,提高蛋白質(zhì)含量。DA6能夠顯著提高種子活力。在甘肅,自交系在花后30天用5.334g/L處理效果最好,PH6WC較對照種子活力提高幅度達(dá)11.567%,鄭58較對照種子活力提高幅度達(dá)15.387%。在山東,鄭58在花后35天用2.667g/L濃度處理效果最好,處理較對照種子活力提高幅度達(dá)19.811%。DA6+油菜素內(nèi)酯、DA6+乙烯利、DCPTA的作用和DA6的作用相類似,主要的差異之處是發(fā)揮作用的時期不同。草甘膦對降低玉米成熟期的水分不同材料反應(yīng)相同。在甘肅,PH6WC在花后30天,用250mg/L濃度處理效果最好,處理的玉米含水量為21.320%,對照的玉米含水量為33.340%,較對照降低水分的幅度達(dá)到最大值為36.052%。鄭58在花后35天,用250mg/L濃度處理效果最好,處理的玉米含水量為26.850%,對照的玉米含水量為36.470%,較對照降低水分的幅度達(dá)到最大值為26.378%。草甘膦對玉米百粒重的影響不同材料反應(yīng)的趨勢一致,草甘膦降低了玉米百粒重。在甘肅,PH6WC和鄭58在花后30天,用250mg/L濃度處理,較對照降低百粒重的幅度分別達(dá)到10.536%和20.385%。草甘膦對種子活力的影響不同材料反應(yīng)一樣。在甘肅,處理對PH6WC和鄭58種子活力的影響不明顯。
[Abstract]:The effects of chemical regulators on the water content and seed vigor of maize inbred lines at maturity stage were studied. Reducing the pressure of drying production line and expanding the service area of drying production line have important application value. In order to improve the seed quality, this study hopes to select the appropriate chemical regulator, spraying time, spraying concentration, by spraying chemical regulators on maize inbred lines. In this study, maize inbred line Zheng 58 and inbred line PH6WC were used as experimental materials, and the chemical regulator DA6 was selected as the chemical regulator, DA6 ethanolactone DA6 ethephon DCPTA, glyphosate (glyphosate). Three different concentrations and four treatments were used to study the effects of chemical regulators on water content, 100-grain weight and chemical composition of seeds in inbred lines at maturity stage. Effects of seed vigor. The results are as follows: 1. The results are as follows: different regions and different materials have different responses to reduce the water content of maize at maturity stage. In Gansu, the inbred lines treated with 2.667g / L concentration of PH6WC at 40 days after anthesis had the best effect. The water content of Zheng 58 was decreased by 10.058g / L compared with the control, and the water content was decreased by 6.934g / L with 8.001g / L. in Shandong, Zheng58 had the best effect with 2.667g / L concentration at 35 days after anthesis. The effect of water content on the 100-grain weight of maize was different in different areas and different materials. In Gansu, the effect of treatment on the 100-seed weight of PH6WC was not obvious, and Zheng58 had the best effect with 2.667g / L concentration on 40 days after anthesis. In Shandong, the effect of the treatment on the 100-grain weight of Zheng58 was not obvious. DA6 treatment significantly affected the chemical composition of maize. DA6 could reduce the starch content of grain. In Gansu, the inbred lines treated with 5.334g / L at 30 days after anthesis had the best effect. PH6WC increased 11.567g / L compared with the control seed vigor, Zheng58 increased 15.387g / L compared with the control seed vigor, in Shandong province, the seed vigor of the inbred lines was increased by 5.334g / L after anthesis, and the seed vigor of the inbred lines was increased by 15.387g / L after anthesis. Zheng58 had the best effect with the concentration of 2.667g / L at 35 days after anthesis, and the effect of the treatment was similar to that of DA6 by increasing the vigor of seed by 19.811. DA6 ethephon. The main difference is that the period of action is different. Glyphosate has the same effect on reducing the water content of corn at maturity. In Gansu Province, PH6WC is best treated with 250 mg / L concentration 30 days after anthesis. The water content of the treated corn was 21.320, and that of the control was 33.3400.The range of decreasing water content was 36.052.The treatment of Zheng58 had the best effect with 250 mg / L concentration 35 days after anthesis. The water content of the treated corn was 26.850, and that of the control corn was 36.470, which reached the maximum value of 26.378.The effect of glyphosate on the 100-grain weight of maize was the same as that of the control, and the effect of glyphosate on the 100-grain weight of maize was the same as that of the control. Glyphosate reduced the 100-grain weight of maize. After 30 days of anthesis, treatment with 250 mg / L concentration of PH6WC and Zheng58 in Gansu Province reduced the 100-grain weight by 10.536% and 20.385, respectively. The effect of glyphosate on seed vigor was the same among different materials. In Gansu, the effect of glyphosate on seed vigor was the same. The effect of treatment on the seed vigor of PH6WC and Zheng 58 was not obvious.
【學(xué)位授予單位】：山東農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：S513

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