寒地超级稻种子发芽特性的比较研究.pdfVIP

黑龙江农业科学 2008(1)：5O～51 Heilongjiang Agricultural Sciences 寒地超级稻种子发芽特性的比较研究 王立志 。王连敏 。王春艳 。李忠杰 。李 锐 。赵宏亮 。王秋菊 。陈淑波 。石玉文。 (1．黑龙江省农业科学院耕作栽培研究所，哈尔滨150086；2．兰西县农业技术推广中心，兰西151500) 摘要：通过对寒地超级稻种子在不同温度下的发芽试验，结果表明；超级稻种子发芽率与温度关系密切．随着积 温的增加水稻种子的发芽率也增加，但积温对发芽的影响程度因品种而异。超级稻品种龙稻5号发芽受积温的 影响最大，临界发芽温度也较高；相比之下超级稻品种松粳 9号和龙粳 14发芽受积温的影响较小，临界发芽温 度也较低。 关键词：超级稻；发芽；积温；临界温度 中图分类号：S5l1．O4 文献标识码：A 文章编号：1002—2767(2008)01—0050—02 Analysis on the Germinant Characteristic of‘Super-rice in Cold Region WANG Li-zhi ，WANG Lian-min ，WANG Chun-yan ，LI Zhong~ie ， LI Rui ，ZHAO Hong-liang ，WANG Qiu-ju ，CHEN Shu-bo ，SHI Yu-wen (1．Crop Tillage and Cultivation Institute，Heilongjiang Academy of Agricultural Sciences，Har— bin 150086；2．Lanxi County Agricultura1 Technology Extension Center，Lanxi 151500) Abstract：The experiment of germination of super—rice in cold region was carried OUt under the different air tem— peratures．The results showed that thcre was a intimate relationships between the germination percentage and ac— cumulated temperature，the germination percentage improved with the increase of the accumulated temperature。 and there was difference among the varieties．The accumulated temperature made the most important effect On the germination of super-rice Longdao No．5，and the critical temperature for germination was the highest．The accu— mulated temperature made less effect on the germinations of super—rice Songjing No．9 and Longjing No．14。and the criticaI temperatures for germinations were Iower than Longdao No．5． Key words：super-rice；germination；accumulated temperature；critical temperature 黑龙江省地处我国东北边陲，属低纬度高寒稻作 育并通过国家验收的3个寒地超级稻品种：松粳9 区，早春水稻播种期气温和地温较低回暖慢，生产上经 号、龙稻5号和龙粳14水稻品种。同时进行各生态 常因为水稻播种后发芽慢甚至不出苗而延误生产，给 区3个对照品种：藤系138、龙稻3号和空育 131的 农民造成沉重的经济负担[1]。水稻种子发芽是复杂的