摘要
试验结果表明，在亩秋施Ｐ２Ｏ５７．５ｋｇ，Ｋ２Ｏ５．０ｋｇ基础上，随施Ｎ水平提高，各生育时期块根中的Ｎ含量和Ｋ＋含量均呈正相关，而叶片中呈负相关；幼苗期特别是糖分积累期，随施Ｎ水平提高，Ｎ对Ｋ＋选择性向地上部运输比率ＳＲＫ．Ｎ值有提高趋势，而在叶丛快速生长期和块根糖分增长期，则呈降低趋势；随生育进程，块根糖分增长期和糖分积累期较苗期和叶丛快速生长期，ＳＲＫ．Ｎ值高出１倍以上；从苗期至块根糖分增长期，ＳＲＫ．Ｎ值与叶片中Ｋ＋含量呈正相关，与块根中Ｋ＋含量呈负相关；在块根糖分增长期，ＳＲＫ．Ｎ值与块根和叶片中Ｎ含量，与叶丛快速生长期叶片中Ｎ含量均呈负相关。各生育时期，块根和叶片的生长量与其中的Ｋ＋含量均呈负相关。
The testing results indicated that the content of N and K+ have positive correlation which in the beet root of each growing stage where N level increasing and to be based on P2O5 7.5 kg/mu and K2O 5.0 kg/mu applied in the Autumn,and has negative correlation in the blade.Increasing the N level to apply,the transporting ratio of K+ has selected to the tops also increasing in the seedling stage and sugar content accumulation stage,especially in the later stage, and it has decreased in the other two stage, the volume of SR K.N getting high about one time when in the later two stage.There is a positive correlation in the volume of SR K.N with content of K+ in the blade and negative correlation with content of K+ in the root.In the sugar content increasing stage,there is a negative correlation in the volume of SR K.N with content of N in the root and blade,and content of N in the blade during the leaves growing fast stage, and there is a negative correlation with increment of root and blade to the content of K+ also.
出处
《中国糖料》
1998年第2期20-23,共4页
Sugar Crops of China
