超干水分长期贮藏对玉米西瓜种子生活力和活力的影响.pdf

浙江大学学报( ) 28( 1) : 3741, 2002 Journal of Zhej iang University (Agric. Life Sci. ) : 1008-9209(2002) 01-0037-05 胡伟民, 段宪明, 阮松林 ( , 310029) : 采用硅胶干燥和较高温度加温干燥两种方法对玉米(Zea may s L.) 种子进行 干处理, 并经七 年常温密闭贮藏. 通过发芽试验和 氧歧化酶( SOD) 活性测定, 结果表明, 用硅胶干燥的玉米种子在水 分降至4. 05% 时生活力和活力最高. 水分 过7.49% 时, 便失去生活力. 较高温度加温干燥的玉米种 子生活力和活力普遍较差, 当水分低于 5. 97% 时, 发芽率迅速降低为零, 无法进行 干贮藏. 另以西瓜 ( Citr ll s lanat s (Th nb.) Mats m . et Nakai) 种子为材料用硅胶进行干燥, 发现水分在 3.73% 时, 生 活力和活力最高, 发芽率为71. 5% . 而低于或高于这 个水分含量, 生活力和活力均明显下降. 由此可见, 采用硅胶进行 干处理, 在 一定时期内有利于玉米和西瓜种子的长期贮藏; 同时也表明了玉米和西瓜种 子不宜过度干燥. : 干贮藏; 生活力; 活力; 玉米; 西瓜 : S339. 3　　　: A HU Wei-min, DUAN Xian-ming, RUAN Song-lin ( Dep t. of A gronamy , Zhej iang Univ . , H angz hou 310029, China ) Effects of ultra-dry treatment and long-term storage on viability and vigor of corn and watermelon . ( . . ) , 2002, 28( 1) : 37-41 seeds Jo rnal of Zhejiang University Agric Life Sci Abstract: Corn (Zea may s L.) seeds w ere s bjected to ltradrying treatment before storage sing tw o approaches, silica gel drying and heat drying at a comparating higher temperat re, and t hen that stored for seven years nder room temperat re and airt ight conditions. Res lt s of seed germination and SOD act ivities meas rem ent show ed t hat viability and vigor of corn seeds which had t heir moist re cont ent lowered to 4. 05% by gel drying w ere highest , w hile t hose with a moist re content higher than 7. 49% w ere nonviable. Corn seeds heat-dried at higher temperat re generally had lower viabilit y and vigor . Germination percent age of s ch seeds w as s ddenly red ced to zero when m oist re cont ent till below 5. 79% and hence w ere not s itable for ltradry storage. In this case, wat ermelon ( Citrullus