脱毒甘薯北京553的生长发育及干物质积累分配规律的研究

The Study on Non virus Sweet Potato Beijing 553's Regularities of Its Growth and Accumulation and Distribution of Dry Substance

脱毒甘薯北京 553地上部生长优势较强 ,茎叶鲜重比对照高 78.2 %,块根发育早 ,膨大快 ,鲜薯产量比对照高 67.3 %.干物质积累量为 1 1 2 9.78kg/667m2 ,全生育期平均比对照高 72 .5%,块根占总干物质的 70 %,茎叶占总干物质的 3 0 %

The growth of the upper of non virus sweet potato is stronger on the ground. The green weight of stems and leaves increase by 78.2 percent compared with that of ck..per 667m 2. The root tubers grow early swell quickly. The yield of non virus green sweet potato increases by 67.3 percent compared with that of ck. The weight of accumulation of dry substance is 1129.78kg and increase by 72.5 percent compared with that of ck . in the whole period of the growth. The root tubers and the stems and leaves account for 70 percent and 30 percent of the gross weight of dry substance respectively.