寒地粳稻低温深播出苗能力鉴定与筛选  

Identification and Selection of Low-Temperature and Deep Seedling Emergence of Japonica Rice in Cold Region

作　　者：胡月婷 田崇兵 马文东[1] 张云江[1] 王继馨[1] 李大林[1] 杨庆[1] 王立楠[1] HU Yueting;TIAN Chongbing;MA Wendong;ZHANG Yunjiang;WANG Jixin;LI Dalin;YANG Qing;WANG Li'nan(Rice Research Institute,Heilongjiang Academy of Agricultural Sciences,Jiamusi 154026,China)

机构地区：[1]黑龙江省农业科学院水稻研究所,黑龙江佳木斯154026

出　　处：《东北农业科学》2024年第2期1-5,共5页Journal of Northeast Agricultural Sciences

基　　金：黑龙江省省属科研院所科研业务费项目(CZKYF2022-1-C012);黑龙江省农业科技创新跨越工程农业科技基础创新优青项目(CX22YQ24);黑龙江省重点研发计划项目(GA23B001)。

摘　　要：低温和深播是影响寒地稻作区水稻直播出苗率的主要因素,本研究对168份寒地粳稻种质资源进行发芽期耐冷性筛选,并对耐冷性极强的35份材料进行低温深播出苗能力鉴定。结果表明,供试材料发芽期耐冷性可分为5个等级,其中耐冷性1级和3级的材料占供试材料的55.3%;低温深播条件下,35份耐冷性极强种质材料的出苗率随播种深度增加和温度降低而下降;低温15℃、覆土2 cm条件下,龙粳63、龙庆稻45、龙粳29、龙粳46、龙庆稻64共5份材料出苗率超过70%。本研究从低温深播对出苗率的影响的角度为寒地直播水稻品种选择提供理论参考。Low-temperature and deep sowing are the main limiting factors for direct seeding of rice in cold region.In this study,168 japonica rice resources in cold region were screened for cold tolerance at germination stage,the results showed that there were significant differences in cold tolerance at germination stage,which could be divided into 5 grades,of which 55.3% were grade 1 and grade 3.The seedling emergence rate of 35 materials with cold tolerance at germination stage was significantly different under low temperature and deep sowing.The seedling emergence rate decreased significantly with the increase of sowing depth and the decrease of temperature,when the temperature is 15 ℃ and the soil cover is 2 cm,the emergence rate of five materials,Longjing 63,Longqingdao 45,Longjing 29,Longjing 46 and Longqingdao 64,is more than 70%,which can be used as variety selection of direct seeding in cold area.

关 键 词：水稻 低温深播 出苗率 筛选 

分 类 号：S511.042[农业科学—作物学]