【摘要】 对美国引种的8个湿地松二代种子园自由授粉半同胞家系进行发芽试验和苗期测定,结果表明:各家系在发芽率和苗高、地径的生长上均存在显著差异。湿地松苗期苗高呈现"快—慢"的生长趋势,而苗期地径生长呈现"慢—快"的生长趋势,说明湿地松苗期的苗高高生长期早于地径的高生长期。根据不同家系苗期生长差异,并结合多重比较分析结果,筛选出AGS-74和AGS-43两个苗期生长表现优良的家系。更多还原

【Abstract】 Germinating and seedling tests for half-sib families of Pinus ellottii from the Unite States were done. The results showed that there were significant differences in germination rate, seedling height and ground diameter among eight half-sib families. The growth trend of"fast-slow"was present in the seedling height of slash pine, and the growth trend of the ground diameter was"slow-fast". The results indicated that growth in the seedling height was earlier than the ground diameter in the seedling stage of Pinus ellottii. According to the seedling growth difference and results of multiple comparative analysis, the AGS-74 and AGS-43 with excellent performance were gained.更多还原