硒和冷锻炼对直播水稻出苗率的影响  

Effects of Se and Cold Hardening on Emergence Rate of Direct-Seeded Rice

作　　者：孙志玲[1] 王欢[1] 周婷[1] 王丽娟[1] 赵广鑫[1] 尹宇龙 罗盛国[1] 

机构地区：[1]东北农业大学资源与环境学院,哈尔滨150030

出　　处：《吉林农业科学》2015年第2期42-45,56,共5页Journal of　Jilin Agricultural Sciences

基　　金：科技部"十二五"科技支撑项目(2013BAD20B04)

摘　　要：采用室内培养法,设置4个品种、3个温度、4个硒浓度,旱直播和水直播2种播种方式,共78个处理,研究亚硒酸钠浸种后再经冷锻炼对提高水稻种子出苗率的影响。研究结果表明:0.06 mg·L-1Se能明显提高水旱直播稻花香2号、鸡西稻1号和龙粳31的出苗率,0.08 mg·L-1Se能明显提高水旱直播空育131的出苗率。0.06 mg·L-1Se处理下,经2℃冷锻炼的旱直播稻花香2号出苗率均比-2℃冷锻炼的和25℃的增加了25个百分点(p<0.01)和12.5个百分点(P<0.05),经-2℃和2℃冷锻炼的旱直播鸡西稻1号出苗率分别比25℃的增加33.3个百分点(P<0.01)和25.0个百分点(P<0.05)。冷锻炼对水直播稻出苗率没有显著影响。An incubation experiment including four rice varieties, three temperatures, four concentration of Se,two seeding methods, 78 treatments in total was conducted to study the effects of seed-soaking with sodium selenitefollowed by cold hardening on enhancing emergence rate of direct-seeded rice. Results showed that the wet and dryseeding emergence rates of Daohuaxiang 2, Jixidao 1 and Longjing 31 seeds increased significantly by treated with0.06 mg·L^-1Se. So did Kongyu 131 seeds treated with 0.08 mg·L^-1Se. The emergence rate of Daohuaxiang 2 seedstreated with 0.06 mg·L^-1Se followed by 2℃ cold hardening was both increased by 25 percent and 12.5 percent（P〈0.01） than-2℃ cold hardening and 25℃ on dry seeding. The emergence rate of Jixidao 1 seeds treated with 0.06mg·L^-1Se followed by-2℃ and 2℃ cold hardening increased by 33.3 percent（P〈0.01） and 25.0 percent（P0.05）than 25℃ on dry seeding, respectively. The effects of cold hardening on wet seeding emergence rate was not signifi-cant.

关 键 词：寒地水稻 硒 冷锻炼 出苗率 

分 类 号：S511[农业科学—作物学]