【摘要】 砾苔草是北方干旱地区很有开发利用价值的一种植物,其种子产量低是阻碍对其开发利用的主要因子之一。本文从砾苔草的生殖生物学特性着手,观察了砾苔草的开花结实特性、测定了该植物在不同条件下的生长特性及种子产量构成因子变化情况。指出:砾苔草种子产量低的原因主要是败育所致,而造成败育率高的原因则主要是对生殖生长的营养供应不足。北方地区春季干旱是影响砾苔草种子生产的主要原因之一。更多还原

【Abstract】 The flowering and fruiting characteristics of Carex stenophylloides were observed.The changing condition of component factor of its growth characteristic and seed production in differ- ent conditions was detected.The result indicated that the reason of low seed production of C. stenophylloides was mainly caused by abortion,which was caused by lack of nutrient supply dur- ing reproductive period.Spring drought in northern China was the main reason of influencing seed production of C.stenophylloides.更多还原