水稻种子特性与直播栽培出苗状况的关系研究  

The Relationship Between Seed Characteristics and Seedling Emergence in Direct Seeding Cultivation

作　　者：陈丽[1] 孙建昌[1] CHEN Li;SUN Jianchang(Institute of Crop Sciences,Ningxia Academy of Agricultural and Forestry Sciences,Yinchuan 750002,China)

机构地区：[1]宁夏农林科学院农作物研究所,银川750002

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

基　　金：宁夏回族自治区自然科学基金项目(2024AAC02059);农业高质量发展和生态保护科技创新示范项目(NGSB-2021-13);宁夏回族自治区重点研发计划项目(2023BCF01010)

摘　　要：为探明水稻种子特性与直播栽培出苗状况间的关系,以15份水稻种子为试验材料,通过暗处理、盐水处理和低温处理,测定种子胚轴长度、胚芽鞘长度和种子发芽情况,比较了两种不同直播栽培条件下水稻种子出苗率与幼苗生长情况。结果表明,胚芽鞘和中胚轴越长,越有利于水稻种子在盐碱、低温逆境条件下幼芽的伸长。播后上水条件下,中胚轴长度与苗期长势等级呈极显著正相关关系,而保墒旱直播条件下,两者相关性不显著,说明水稻直播出苗和水稻品种自身特征特性有关,还与直播深度和灌水方式有关。In order to clarify the correlation between the characteristics of rice seeds and direct seedling emergence,15 rice seeds were used as test materials.Seed hypocotyl length,coleoptile length and germination were measured by dark treatment,salt water treatment and low temperature treatment.The seed germination under different conditions was determined simultaneously with the emergence rate and seedling growth under two different direct seeding cultivation conditions.The results showed that the length of the coleoptile and mesocotyl was closely related to the salt and low temperature tolerance of the seed.The longer the coleoptile and mesocotyl,the more favorable the rice seed was under the conditions of saline-alkali and low temperature stress.Under the conditions of direct seedling protection and drought-seeding and sowing after seeding,the mesocotyl length of seeds were significantly correlated with seedling growth,but there was no significant correlation between the two under the condition of moisture conservation and drought.The results showed that direct seeding of rice was related to the characteristics of rice varieties,depth of direct seeding and irrigation conditions.

关 键 词：水稻 种子特性 中胚轴长度 胚芽鞘长度 旱直播 出苗状况 

分 类 号：S511.04[农业科学—作物学]