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.
作者
庾振宇
张江林
高雅洁
廖育林
鲁艳红
方畅宇
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)
出处
《草业科学》
CAS
CSCD
北大核心
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)。
