中国马铃薯2026，Vol.40Issue(2)：109-120,12.DOI:10.19918/j.cnki.1672-3635.2026.02.004
马铃薯块茎消亡与氮素供应的关系
Relationship Between Potato Tuber Degradation and Nitrogen Supply
摘要
Abstract
Nitrogen plays a critical regulatory role in the growth and development of potatoes.While many studies have focused on the mechanisms by which nitrogen influences tuberization,research specifically addressing the relationship between nitrogen supply and tuber degradation is limited.Tuber number is a key yield component;however,not all initiated tubers develop to harvest,and some are degraded,potentially due to insufficient nitrogen availability.This study investigated the effects of varying nitrogen application rates on potato tuber number dynamics using the cultivar'Favorita'.Tuber number dynamics under different nitrogen levels were observed,and the relationships between leaf total nitrogen concentration,nitrogen accumulation,and changes in tuber number were analyzed to elucidate the effect of nitrogen supply on tuber degradation.Nitrogen application rate influenced the frequency of tuber degradation,thus regulating the number of tubers per plant and ultimately affecting yield.Adequate nitrogen supply reduced the occurrence of tuber degradation.Compared with the no-nitrogen treatment,under sufficient nitrogen supply(N 300 kg/ha),the number of tubers per plant increased by 39%,and the proportion of plants with tuber degradation reduced by an average of 26%.Models describing the relationships between leaf total nitrogen concentration,nitrogen accumulation per hectare,and tuber number were established.These results provide important support for optimal nitrogen management in potatoes.关键词
马铃薯/块茎数量/块茎消亡/氮素Key words
potato/tuber number/tuber degradation/nitrogen分类
农业科技引用本文复制引用
杨子,孔婧,苏春光,于静,贾立国..马铃薯块茎消亡与氮素供应的关系[J].中国马铃薯,2026,40(2):109-120,12.基金项目
呼和浩特市创新联合体项目(2023RC-联合体-11) （2023RC-联合体-11）
英才兴蒙团队项目(2025TEL13) （2025TEL13）
内蒙古自治区直属高校基本科研业务费项目(BR251041). （BR251041）
