华北农学报Issue(4)：206-212,7.DOI:10.7668/hbnxb.2015.04.035
施氮对鲜食型甘薯干物质及养分积累与分配特性的影响
Effects of Nitrogen Application on Characteristics of Dry Matter and Nutrient Accumulation and Distribution of Fresh-eating Sweet Potato
摘要
Abstract
To clarify of the relationship of nitrogen application with dry matter and nutrient accumulation and distribution of fresh-eating sweet potato,the effects of different nitrogen levels on characteristics of dry matter and N,P2 O5 and K2 O accumulation and distribution of fresh-eating sweet potato have been studied in the pot experi-ment.The cultivars of fresh-eating sweet potato(LS9 and YS25)were selected as experimental material.The results showed that the accumulation of dry matter and N,P2 O5 ,K2 O of YS25 and LS9 shoot were increased with the in-crease of nitrogen fertilizer application in the same developing stage,while those of YS25 and LS9 root-tuber were increased at first,and then decreased,and their distribution rates of root-tuber were decreased with nitrogen supply. The amounts of nutrients which needed for the formation of 1 00 kg dried sweet potato of LS9 and YS25 were in-creased gradually with the increase of amount of N applied,and that was K2 O >N >P2 O5 .In generally,the varieties of LS9 had higher production efficiency of N,P2 O5 ,K2 O and dry matter,while YS25 had lower production efficiency of nutrients and dry matter.It showed that LS9 and YS25 had higher and lower physiological use efficiency of the nutrients separately.Responses of production efficiency of nutrients and dry matter of fresh-eating sweet potato (YS25 and LS9)to nitrogen application were almost consistent,namely production efficiency of nutrients and pro-duction efficiency of dry matter of N,P2 O5 and K2 O of sweet potato were decreased by nitrogen application.关键词
氮/鲜食型甘薯/干物质/养分/积累与分配Key words
Nitrogen/Fresh-eating sweet potato/Dry matter/Nutrient/Accumulation and distribution分类
农业科技引用本文复制引用
高璐阳,房增国..施氮对鲜食型甘薯干物质及养分积累与分配特性的影响[J].华北农学报,2015,(4):206-212,7.基金项目
国家甘薯产业技术体系营养与栽培生理岗位项目（CARS-11-B-14）；山东省薯类产业创新团队栽培与土肥岗位 （）
