植物营养与肥料学报Issue(6)：1349-1357,9.DOI:10.11674/zwyf.2014.0604
小麦苗期氮素吸收利用效率差异及聚类分析
Screening and cluster analysis of nitrogen use efficiency of different Wheat cultivars at the seedling stage
摘要
Abstract
Objectives]Excessive aPP1ication of nitrogen ferti1izer 1ead to nitrogen 1oss and cost increase of agricu1tura1 Production. Screening and breeding croP cu1tivars with high nitrogen use efficiency is effective way of increasing nitrogen ferti1izer use efficiency and reducing environmenta1 risks. In this PaPer,44 wheat cu1tivars at the seed1ing stage for their Potentia1 of high nitrogen use efficiency were screened.[Methods]HydroPonic exPeriments were conducted with norma1(5 mmo1/L)and high(45 mmo1/L)nitrogen 1eve1s. Eva1uation indices were standardized by the method of Subordinate function into interva1[ 0 ,1 ],and the standardized data were ca1cu1ated into a dimension1ess integrated va1ues by objective weighting method. Based on the comPrehensive va1ue using the shortest distance method and squared euc1idean distance method of c1ustering ana1ysis,44 wheat cu1tivars were divided into different categories using their nitrogen use efficiency.[Results]There are significant differences in shoot dry weight( SDW),root dry weight( RDW),1eaf area( LA),shoot nitrogen accumu1ation( SNA)and root nitrogen accumu1ation( RNA)of the wheat cu1tivars between the two N suPP1y 1eve1s. The coefficients of variation( CV)of SDW,RDW,LA,SNA and RNA are between 27. 9% -33. 7% and 21. 5% -33. 7% under the norma1 and high nitrogen 1eve1s,resPective1y. The integrated nitrogen use efficiency va1ues( INUEV)under the norma1 and high nitrogen 1eve1s at the seed1ing stage are 0. 053-0. 920 and 0. 001-0. 853,resPective1y. The INUEV of Jian76 wheat cu1tivar is greater than 80% under the both norma1 and high nitrogen 1eve1s. Based on the INUEV and the c1ustering ana1ysis( CA)of INUEV,the 44 wheat cu1tivars are divided into three categories which are high,midd1e and 1ow nitrogen use efficiencies( NUE ). The Yangmai16 and Jian76 be1ong to high NUE category under both norma1 and high nitrogen 1eve1s,and the Wanmai68,F60501-4,Jian62 and Annong1026 be1ong to high NUE wheat cu1tivars on1y under the high nitrogen 1eve1. The wheat cu1tivars with high,midd1e and 1ow nitrogen use efficiencies in the norma1 nitrogen condition account for 4. 54%,54. 55% and 40. 91%,and 13. 63%,38. 64 and 47. 73% high nitrogen condition.[Conclusions]The shoot nitrogen accumu1ation,shoot dry weight,root nitrogen accumu1ation,root dry weight and 1eaf area can be used as indices to eva1uate the Potentia1s of wheat cu1tivars at the seed1ing stage;The Yangmai16 and Jian76 are Pre1iminary confirmed as the wheat cu1tivars with high nitrogen use efficiency in the norma1 and high nitrogen conditions,Wanmai68,F60501-4,Jian62 and Annong1026 as cu1tivars with high nitrogen use efficiency in the high nitrogen conditions.关键词
小麦/苗期/氮吸收效率/聚类分析Key words
wheat/seed1ing stage/nitrogen uPtake efficiency/c1uster ana1ysis分类
农业科技引用本文复制引用
杜保见,郜红建,常江,章力干..小麦苗期氮素吸收利用效率差异及聚类分析[J].植物营养与肥料学报,2014,(6):1349-1357,9.基金项目
国家科技支撑计划项目（2012BAD20B05，2012BAD04B09，2013BAD07B08）资助。 （）
