内蒙古民族大学学报（自然科学版）2024，Vol.39Issue(2)：39-45,7.DOI:10.14045/j.cnki.15-1220.2024.02.007
夏季不同播期对苜蓿抗寒性及越冬的影响研究
Study on the Effects of Different Sowing Dates in Summer on Alfalfa Cold Resistance and Overwintering
摘要
Abstract
In order to investigate the effects of different sowing dates in summer on the cold resistance and over-wintering ability of alfalfa.The roots were treated with low temperature that three alfalfa varieties with four sowing dates sampled in late autumn,and the activity of antioxidant enzymes and soluble protein content in the root neck of alfalfa were measured,and the overwintering rate was measured in the following year.The study showed that the overwintering rate of different alfalfa varieties gradually decreased with the delay of sowing period.The highest over-wintering rate observed for alfalfa sown on July 1st.The sowing date treatment had a significant impact on the activi-ty of superoxide dismutase and soluble protein content in the root neck of alfalfa(P＜0.01),low temperature treat-ment had the significant effect on the activities of superoxide dismutase,peroxidase and catalase in alfalfa root neck(P＜0.01).There was no significant change in the activity of antioxidant enzymes and soluble protein content among different alfalfa varieties.The overwintering rate of alfalfa is significantly positively correlated with the activi-ty of superoxide dismutase and soluble protein content in the root neck(P＜0.05).The early broadcast of the summer(July 1st to July 15th)is beneficial for the safe overwintering of alfalfa,and regular changes in antioxidant enzyme activity and soluble protein content in root neck of alfalfa had obvious positive effects on its cold resistance.关键词
播期/低温胁迫/苜蓿/抗寒性/越冬Key words
sowing date/low-temperature stress/alfalfa/cold resistance/overwintering分类
农业科技引用本文复制引用
刘罡,张庆昕,张玉霞,朱爱民,陈卫东,田永雷..夏季不同播期对苜蓿抗寒性及越冬的影响研究[J].内蒙古民族大学学报（自然科学版）,2024,39(2):39-45,7.基金项目
国家牧草产业技术体系项目(CARS-34) （CARS-34）
内蒙古自治区直属高校专项(GXKY22018) （GXKY22018）
内蒙古自治区生态农业国家民委重点实验室开放基金项目(MDK2023095) （MDK2023095）
