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(一)水稻种子在加温干燥过程中的失水速率随温度和原始水分上升而增加。当温度达60℃以上时,失水速率显著增快。总的看来,温度每上升10℃,失水速率约增加2.0%/小时。(二)水稻种子对高温的忍受能力和它的原始水分有关,原始水分越高,越不耐高温,水稻种子的安全干燥温度为50℃。若品种较耐高温或原始水分较低的情况下,可考虑用60℃。(三)水稻种子在60℃以下的温度进行干燥,发芽力可以维持与对照相同的水平。在自然条件下贮藏大多数品种的耐藏性可以保持与对照相同水平或略有提高。(四)水稻种子加温干燥对淀粉酶、过氧化氢酶和脱氢酶活性产生促进或抑制作用,随温度和水分而转移。淀粉酶和过氧化氢酶活性变化和发芽率基本一致,其相关系数均达极显著水平。(五)水稻种子在60℃以下进行干燥,淀粉酶和过氧化氢酶活性比对照有所提高或保持相同水平。(六)数据的统计分析结果表明:凡经干燥处理后淀粉酶或过氧化氢酶活性比对照有明显下降时,表明种子已经遭受高温灼伤的影响。在贮藏过程中或迟或早会从发芽率上显示出来。
(A) The water loss rate of rice seeds during the warming and drying process increases with the increase of temperature and original moisture. When the temperature is above 60 ℃, the water loss rate is significantly faster. In general, the rate of water loss increases by about 2.0% / hour for each 10 ° C rise in temperature. (B) of rice seed tolerance to high temperatures and its original moisture, the higher the original moisture, the less heat-resistant, the safe drying temperature of rice seeds is 50 ℃. If the species is more resistant to high temperatures or lower initial moisture, consider using 60 ℃. (III) The rice seeds are dried at a temperature below 60 ° C, and the germination force can be maintained at the same level as the control. The storage stability of most cultivars under natural conditions can be kept at the same level as the control or slightly increased. (D) rice seeds warming drying on amylase, catalase and dehydrogenase activity to promote or inhibit the role, with the temperature and moisture transfer. Amylase and catalase activity changes and germination rate are basically the same, the correlation coefficient reached an extremely significant level. (E) rice seeds dried below 60 ℃, amylase and catalase activity than the control increased or maintained the same level. (VI) Statistical Analysis of the Data The results showed that when the activity of amylase or catalase significantly decreased after drying, the seeds had been subjected to high temperature burns. In the process of storage, sooner or later, from the germination rate will be displayed.