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温汤浸种对辣椒种子的休眠破除作用及致死条件分析

Analysis of Dormancy Breaking Effects and Lethal Condition of Hot Water Treatment of Pepper Seeds

DOI：

英文关键词:Keywords: pepper seed hot water treatment of seed germination rate

基金项目:基金项目：湖南省农业科技创新资金资助项目（2021CX53）；国家现代农业产业技术体系资助专项（CARS23-G-31）。

作者	单位
蒋　万1 ，张忠武1*，杨连勇1 ，孙信成1 ，康　杰1 ，邓正春2 ，杨　宇3	（1.常德市农林科学研究院，湖南常德 415000；2.常德市农学会，湖南常德 415000；3.常德市农业农村局，湖南常德 415000）

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中文摘要:

摘要：为了打破辣椒种子休眠，提高其发芽率，以“六十早”辣椒新种子为试材，分别在水温55、 65 ℃条件下，研究浸种时间为0、5、10、15、20、25、30、35、40、45、50、55、60、65、70 min的种子发芽率。结果表明：在水温55 ℃下，辣椒种子的发芽势在短时间（≤35 min）浸种时较高，而发芽率在整个观测周期内相对变化较小；随着温汤浸种时间（＞35 min）的延长，发芽势和发芽率均呈现快速下降趋势。在水温65 ℃下，即使短时间浸种，其发芽率也迅速下降。总结得出，水温55 ℃条件下浸种时间与发芽率的关系式为y＝－0.001 6x3 ＋0.065 7x2 －0.599 5x＋96.545（0＜x≤40），最佳浸种时间为21.59 min；长时间浸种时，处理时间与相对发芽率的关系式为y'＝0.101 8x2 －13.171x＋430.94 （35＜x≤70），相对发芽率降低到50%的浸种时间为43.64 min，降低到10%的浸种时间为57.61 min。实践中可根据种子处理目的在55 ℃下选定相应的浸种时间。

英文摘要:

Abstract: In order to break the dormancy of pepper seeds and improve their germination rate, new seeds of pepper cultivar 'Liushizao' were used as test materials, and the germination rates of seeds soaked for 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70 min were studied under the conditions of water temperature of 55 ℃ and 65 ℃, respectively. The results showed that the germination potential of pepper seeds was higher when those soaked in a short time (≤35 min) at water temperature of 55 ℃, the germination rate relatively changed slightly during the whole observation period. With the prolongation of seed soaking time (>35 min),the germination potential and germination rate of pepper seeds showed a rapid downward trend. When the water temperature was 65 ℃, the germination rate of the seeds decreased rapidly even after a short soaking time. It was concluded that the relationship between soaking time and germination rate at 55 ℃ was y = -0.001 6x3 + 0.065 7x2 - 0.599 5x + 96.545 (0

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