采种温度及贮藏年限对籽瓜种子生活力的影响

在人工控制的温度条件下研究了采种温度对籽瓜种子生活力的影响，结果表明４５～５５℃的干燥温度不影响籽瓜种子的生活力；但２℃的低温会显著降低籽瓜种子的生活力，而遭遇０℃及其以下低温２ｈ以上就会使籽瓜种子失去种用价值。对不同年份采收的种子进行的发芽试验表明，籽瓜种子的生活力随贮藏年限的延长而降低，黑籽籽瓜种子的有效贮藏期限约为２～３ａ，红籽籽瓜种子的有效贮藏期限为４～５ａ。

Effect of Drying Temperatures and Storing Duration on Seed Viability of Seedusing Watermelon

Effect of drying temperatures on seed viability of seedusing watermelon was studied under artificial tempertures. The results showed that drying under temperatures between 45～55℃ did not cause the seed viability decrease; while drying temperatures at or below 2℃ would cause noticeable decrease. The seeds would lost their viability completely if they exposed at 0℃ or lower temperatures for 2 h or longer time. Germination tests with seeds stored for various years indicated that seed viability of seedusing watermelon decreased gradually as the storage time prolonged. Available seed storage duration is about 2～3 years for black seed cultivars and 4～5 years for red seed cultivars.