马铃薯对氮、磷、钾的吸收及分配规律研究进展

马铃薯的生长发育受到很多因素的影响,特别是养分的供应以及马铃薯对养分的吸收、利用,对其块茎的形成、膨大及淀粉积累的影响尤为显著。氮、磷、钾在马铃薯生长发育中需要量大,必须加以补充,才能满足其正常生长需求。生产上不合理的施肥,导致马铃薯产量不高、品质较差及生产成本增高。通过分析马铃薯不同生育阶段、不同器官吸收养分的特征和分配规律,从而探索马铃薯生产中最佳的氮、磷、钾施肥组合,这对于丰富马铃薯栽培生理理论和指导生产中氮、磷、钾肥合理配施均具有重要的现实意义。

Absorption and Distribution of NPK in Potatoes

The growth and devel opment of potatoes are affected by many factors,especially nutrition supply for absorption and utilization in potato,which have important roles to play in tuber initiation,bulking and starch accumulation.Nitrogen,phosphorus and potassium are required in large quantity for potato growth and development,but generally lack in the soil,and have to be applied to meet the needs for its normal growth.Unreasonable fertilization in production would result in low tuber yield,poor quality,and high production costs.In this paper,the nutrient absorption and distribution in different parts at different growth stages of the potato were analyzed in order to find the optimum combination of nitrogen,phosphorus and potassium fertilizers for potato production,which is really important for physiological research and reasonable nitrogen,phosphorus,potassium application in potato production.