蒙古黄芪物候期研究

为掌握移栽蒙古黄芪生长发育规律,准确划分其物候期,本研究以甘肃渭源县自育蒙古黄芪种苗为材料,按照根粗、主根长和根鲜重3个指标将其依次分为大、中、小苗3个等级分别进行移栽。移栽后采用田间系统定点追踪观测和定期分类测定相结合的方法,对其物候期进行跟踪记载,在出苗30 d后对各器官生物量进行定期采样测定。通过观测比较3种不同等级的黄芪种苗移栽后生长发育规律的变化,最终根据其根、茎、叶、花、果实等器官的生长发育动态特征,以及各主要器官的生物量在不同生育期中的比例变化等特点将移栽蒙古黄芪物候期划分为移栽出苗期、现蕾开花期、根茎伸长期、果实成熟期、根茎增粗期5个时期。

A study on phenological phases of Astragalus membranaceus

To develop a good understanding of growth-development of transplanted Astragalus membranaceus, and an accurate division of phenological phases, A. membranaceus sleedings were studied by classification transplanting. Fixed-point and real-time observations were combined with comprehensive surveys in the field, to observe and compare the growth and development stages of different grade seedlings of A. membranaceus. The phenological phases of A. membranaceus were divided into five stages: emergence after transplantation, budding and flowering stage, elongation stage of roots, fruit maturation stage, and diameter of roots.