播前不同肥料基施对中早熟马铃薯LK99氮素吸收规律的影响  

Effect of Different Fertilizer Basal Application before Sowing on Nutrient Absorption of Mid-maturity Potato LK99

作　　者：罗爱花[1] 陆立银[1] 王一航[1] 谢奎忠[1] 陈富[1] 

机构地区：[1]甘肃省农业科学院马铃薯研究所,甘肃兰州730070

出　　处：《长江蔬菜》2011年第12期57-59,共3页Journal of Changjiang Vegetables

基　　金：国家马铃薯产业技术体系(CARS-10)建设专项资金;甘肃农业科学院院列项目"马铃薯优质高产栽培技术研究与产业化示范"(nky-0701)

摘　　要：研究了播前常规肥料和综合养分基施对中早熟马铃薯LK99一级种养分吸收及产量的影响。试验结果表明,LK99植株生育期对N素吸收呈"慢-快-慢"的"S"型曲线。生育前期植株吸收的N素主要分配在叶片和茎秆中;出苗后55 d左右,N素在茎叶和块茎中的分配几乎各占一半;至成熟期,约有90%的N素贮存在块茎中。出苗后60 d左右是马铃薯N素需求关键期。综合养分处理明显提高了中早熟马铃薯LK99一级种的商品薯率、单株生产力及块茎产量,平均667 m2增产26%。The large and medium and trace element fertilizer（integrated nutrient treatment） mixed used on nitrate uptake and yield of the early-maturity potato LK99 were studied.The results showed that the trend of potato LK99 plants on N absorption was ＂slow-fast-slow＂ as ＂S＂ curve.At the early stage,uptake of nitrogen of potato LK99 mainly distributed in leaves and stems,and around 55 d after emergence,N up taken of leaves was almost near to it of stem.To maturity,about 90% of the nitrogen up taken stored in tubers.Around 60 d after emergence is the critical period for nitrogen demand of potato LK99.Integrated nutrient treatment increased significantly commodity tuber rates,plant productivity and tuber yield than the condition treatment with the average increased by 26%.

关 键 词：中早熟 马铃薯 LK99 N素吸收 

分 类 号：S532[农业科学—作物学]