植物营养与肥料学报2012，Vol.18Issue(2)：475-482,8.
不同类型甘薯品种氮、钾积累分配及其与产量性状的关系
Accumulation and translocation of nitrogen and potassium and their relationships with yielding traits for different type cultivars of sweet potato
摘要
Abstract
The experiment systematically researched the dynamic changes of nitrogen and potassium accumulations, the difference of their translocations between vines and tuberous roots in 6 types of sweet potato, The relationships between N and K contents and yielding traits were analyzed. The results suggest that the nitrogen contents of the vines of all sweet potato cultivars are decreased gradually after tuberous root formation, the content is about 2% in vines, and the nitrogen contents in tuberous roots are changed a little during thickening. The potassium contents both in vines and in tuberous roots are relatively stable. For the distributions of nitrogen and potassium, the N content in vines is far more than that in tuberous roots, while the K content in tuberous roots is far more than that in vines. For the high-starch types, the N contents of tuberous roots are from 0. 68% to 0. 86%, and those of vines are from 1.98% to 3.32%. For low-starch types, the N contents of tuberous roots and vines are from 0. 69% to 0.86% and from 2.00% to 3.17% respectively. Correspondingly, for the high-starch types, the K contents are from 5.83% to 6.66% and from 3.19% to 3.70% , and for the low-starch types, the K contents are from 6. 12% to 6.36% and from 3.48% to 3.90%. For the all types, the K contents in roots are significantly and positively related with the N contents in roots, and the K contents in vines are closely related with the K ratios of root/shoot negatively. For the high-starch types, there are significantly and positively correlation between the N contents in vines and percentages of dry matter, and between K ratios of roots to shoots and commercial percentages, while there is remarkably negative correlations between the K contents of roots and biomass. For the low-starch types, there are markedly positive correlations between the N contents in vines and biomass, and between the K contents in vines, biomass and starch yield, while there is notably negative correlation between the K contents in vines and starch yields.关键词
甘薯/氮/钾/积累与分配/产量性状Key words
sweet potato/nitrogen/potassium/accumulation and translocation/yielding trait分类
农业科技引用本文复制引用
吕长文,赵勇,唐道彬,王季春,何凤发,张凯..不同类型甘薯品种氮、钾积累分配及其与产量性状的关系[J].植物营养与肥料学报,2012,18(2):475-482,8.基金项目
重庆市自然科学基金项目 （）
中央高校基本科研业务费专项（XDJK2009C117）资助. （）
