| 玉米冷害机理及化学控制防御的效应 |
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| 引用本文： | 高妙真.玉米冷害机理及化学控制防御的效应[J].东北农业大学学报,1989(4). |
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| 作者姓名： | 高妙真 |
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| 作者单位： | 东北农学院栽培教研室 |
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| 摘 要： | 本实验结果表明,玉米芽期低温(3℃)处理,导致淀粉酶活性降低,麦芽糖较对照减少8.6mg/g 干重,可溶性糖含量减少5.5%,淀粉含量高8.1%;幼苗期低温处理1天和4天,叶绿素含量较对照分别减少0.13和0.29mg/g 干重;玉米生育后期,旗叶淀粉酶活性随播期推迟而减弱,第Ⅳ播期旗叶麦芽糖含量较第Ⅱ播期减少748μg/g 鲜重。试验还表明,松哈地区4月25日(第Ⅱ播期)左右,为玉米最佳播种期。在玉米雄穗分化早期,施用13.3～40g/亩乙烯利(Ethephon),平均增产8～12%;早玉米拔节期每亩叶面喷酒50公斤0.25%矮壮素(Cycoel),增产33.8%。
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| 关 键 词： | 玉米 低温冷害 淀粉酶 植物生长调节剂 人工气候箱 |
MECHANISM OF CHILLING INJURY OF CORN AND THE EFFECT OF CHEMICAL CONTROL TO PREVENT CHILLING |
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| Gao Miaozhen.MECHANISM OF CHILLING INJURY OF CORN AND THE EFFECT OF CHEMICAL CONTROL TO PREVENT CHILLING[J].Journal of Northeast Agricultural University,1989(4). |
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| Authors: | Gao Miaozhen |
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| Abstract: | This paper reported that chilling treatment(3℃)of budding corn resultedin lower activity of amylase.Maltose was reduced by 8.6 mg/g dry weight,com-pared with the control groups.Soluble carbohydrates were reduced by 5.5%.Starch was increased by 8.1%.After one and four days chilling of the youngplant,chlorophyl content was reduced by 0.13 and 0.29 mg/g fresh weight re-spectively.At the late stage of growth and development,the activity of amylaseof top leaves was reduced with the delayed sowing time.Maltose in top leavesat the 4th sowing time was reduced by 748 mg/g fresh weight,compared withthe 2nd sowing time.The best sowing time in the region of Songhuajiang-Harbinis about April 25th—the 2nd sowing time.The application of 200-600 g/ha Eth-ephon in the early period of stamen differentiation increased the yield by 8～12%on average.Spraying 50 kg of 0.25% cycocel increased the yield by 33.8%. |
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| Keywords: | corn chilling injury amylase plant groth regulator artificial climate box |
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