^(60)Co-γ射线辐照对紫云英生长及利用的影响  

Effects of^(60)Co-γray irradiation on the growth and utilization of Chinese milk vetch

作　　者：庾振宇 张江林 高雅洁 廖育林[1,3] 鲁艳红 方畅宇[1,2] 刘芳禧 谢雪 肖健 袁浩亮 屠乃美 聂军 YU Zhenyu;ZHANG Jianglin;GAO Yajie;LIAO Yulin;LU Yanhong;FANG Changyu;LIU Fangxi;XIE Xue;XIAO Jian;YUAN Haoliang;TU Naimei;NIE Jun(Hunan Institute of Soil and Fertilizer,Changsha 410125,Hunan,China;College of Agronomy,Hunan Agricultural University,Changsha 410128,Hunan,China;Hunan Arable Land Conservation Scientific Observation and Experimental Station,Ministry of Agriculture and Rural Affairs,Changsha 410125,Hunan,China)

机构地区：[1]湖南省土壤肥料研究所,湖南长沙410125 [2]湖南农业大学农学院,湖南长沙410128 [3]农业农村部湖南耕地保育科学观测实验站,湖南长沙410125

出　　处：《草业科学》2024年第9期2054-2062,共9页Pratacultural Science

基　　金：国家重点研发计划项目(2021YFD1700200);现代农业产业技术体系建设专项资金(CARS-22-G-11);湖南省农业科技创新资金项目(2022CX123)。

摘　　要：为探究^(60)Co-γ射线对紫云英(Astragalus sinicus)种子的诱变效应,明确适合紫云英翻压利用及生长的辐照剂量,本研究以紫云英种子为试验材料,采用不同^(60)Co-γ射线辐照剂量[0(CK)、300、500、700 Gy]处理种子,观察比较紫云英的养分吸收特性、发芽率和田间生长状况。结果表明,辐射处理可提高紫云英盛花期的氮(N)含量,500 Gy处理盛花期N含量最高。在等N投入量下,与CK相比,500 Gy处理的翻压量可减少2063 kg·hm^(−2),便于机械翻压操作。与CK相比,辐照处理的出苗数、株高等多项指标均呈降低趋势,高辐照剂量700 Gy处理的鲜草产量和种子产量均显著降低(P<0.05),500 Gy处理的各项指标与CK最为接近,且相差较小。综上,用500 Gy的^(60)Co-γ射线辐照紫云英种子,提高了单位质量的氮素含量,便于盛花期轻简翻压利用。To explore the mutagenic effect of ^(60)Co-γrays on Chinese milk vetch and clarify the suitable irradiation dose for its utilization and growth,Chinese milk vetch plants were treated with different ^(60)Co-γ-ray irradiation doses[0(CK),300,500,and 700 Gy]to observe and compare the nutrient absorption characteristics,germination rate,and field growth conditions.The results showed that radiation treatment improves the N content during the flowering period,and Chinese milk vetch treated with 500 Gy had the highest N content.Under equal N input,compared with CK treatment,the incorporation amounts under 500 Gy treatment can be reduced by 2063 kg·hm−2,which is convenient for mechanical flipping operations.Compared with CK treatment,the number of seedlings produced by radiation treatment and many indicators of a tall plant height showed a downward trend.Fresh grass yield and seed yield were significantly reduced under treatment with a high irradiation dose of 700 Gy(P<0.05).The indicators of 500 Gy treatment were the closest to those of CK treatment,and the difference was relatively small.in summary,irradiation of Chinese milk vetch with 500 Gy ^(60)Co-γrays improved the nitrogen content per unit mass,which was convenient for light and simple overturning and utilization during the flowering period.

关 键 词：^(60)Co-γ射线 紫云英 翻压量 产量 氮含量 

分 类 号：S541.3[农业科学—作物学]