不同时期平茬对柠条生长和成活率的影响  

Effect of stumping at different stages on growth and survival of Caragana korshinskii

作　　者：翟昊 郝乐乐 李国庆 胡敏 孙明宇 王瑞刚[1] 郜晋楠 万永青[1] ZHAI Hao;HAO Le-le;LI Guo-qing;HU Min;SUN Ming-yu;WANG Rui-gang;GAO Jin-nan;WAN Yong-qing

机构地区：[1]内蒙古农业大学生命科学学院,内蒙古呼和浩特010018 [2]杭锦旗林业和草原事业发展中心,内蒙古鄂尔多斯017400

出　　处：《饲料研究》2023年第22期106-109,共4页Feed Research

基　　金：内蒙古自治区自然科学基金(项目编号:2022MS03035);鄂尔多斯市科技重大专项(项目编号:2022EEDSKJZDZX017)。

摘　　要：试验旨在探究不同时期平茬对柠条生长和成活率的影响。试验以乌兰察布市四子王旗柠条为研究对象,4—10月逐月进行平茬工作,并测定柠条的营养成分,待柠条生长两年后,评测其成活率及萌蘖株相关参数。结果显示,柠条于8月平茬后萌蘖株平均高度的复壮比例为38.15%,4月柠条的萌蘖株平均冠幅复壮比例为136.92%,适宜对柠条进行平茬;8、9月萌蘖株平均冠幅复壮比例较低,不适宜进行平茬工作。4月平茬柠条萌蘖株平均新生支数最多,为257.00枝;7月新生枝数较少。4月平茬柠条萌蘖株新生枝平均鲜重的复壮比例为14.73%;7月份平茬效果最差。6月平茬柠条萌蘖株平均直径的复壮比例为56.64%,7、8月平茬柠条萌蘖株平均直径复壮比例较低。研究表明,柠条在不同时期平茬不会降低其成活率。The experiment was to investigate the effect of different periods of flat-cropping on growth and survival rate of Caragana korshinskii.The experiment took Caragana korshinskii of Siziwangqi in Ulanqab city as the research object and measured its nutrient composition every month between April and October.After two years of growth,the survival rate and related parameters of sprouting plants were evaluated.The results showed that the recovery rate of the average height of tillers was 38.15%in Caragana korshinskii after the flat-stupping in August.In April,136.92%of the average crown width of tillers were restored,which was suitable for flat stupping.In August and September,the average crown width of tillers was low,which was not suitable for flat stupping.In April,257.00 new branches were the most in Caragana korshinskii.The number of new branches was low in July.In April,the average fresh weight of new branches of Caragana korshinskii was 14.73%.The effect of flat stubble in July was the worst.The recovery ratio of the average diameter of tillers was 56.64%in June,which was lower in July and August.The study indicates that the survival rate of Caragana korshinskii is not reduced in different periods.

关 键 词：柠条 抚育 平茬 生长 成活率 

分 类 号：S816[农业科学—饲料科学]