Evaluation of the yield and nitrogen use efficiency of the dominant maize hybrids grown in North and Northeast China

查看全文 作　　者：CHEN [1,2]FanJun;FANG [3]ZenGuo;GAO [4]Qiang;YE [5]YouLiang;JIA [6]LiangLiang;YUAN [1,2]LiXing;MI [1,2]GuoHua;ZHANG [1,2]FuSuo

机构地区：[1]Key Laboratory of Plant-Soil Interaction,Ministry of Education;[2]College of Resources and Environmental Science,China Agricultural University;[3]College of Resources and Environmental Science,Qingdao Agricultural University;[4]College of Resources and Environmental Science,Jilin Agricultural University;[5]College of Resources and Environmental Science,Henan Agricultural University;[6]Institute of Agricultural Resources and Environment,Hebei Academy of Agriculture and Forestry

出　　处：《Science China(Life Sciences)》索引2013年第56卷第6期,共9页

基　　金：supported by the National Basic Research Program of China (2011CB100305,2009CB11860);the National Natural Science Foundation of China (31121062,31172015);the Special Fund for Agriculture Profession (201103003) 摘　　要：Breeding high-yielding and nutrient-efficient cultivars is one strategy to simultaneously resolve the problems of food security,resource shortage,and environmental pollution.However,the potential increased yield and reduction in fertilizer input achievable by using high-yielding and nutrient-efficient cultivars is unclear.In the present study,we evaluated the yield and nitrogen use efficiency(NUE) of 40 commercial maize hybrids at five locations in North and Northeast China in 2008 and 2009.The effect of interaction between genotype and nitrogen(N) input on maize yield was significant when the yield reduction under low-N treatment was 25%-60%.Based on the average yields achieved with high or low N application,the tested cultivars were classified into four types based on their NUE:efficient-efficient(EE) were efficient under both low and high N inputs,high-N efficient(HNE) under only high N input,low-N efficient(LNE) under only low N input,and nonefficient-nonefficient under neither low nor high N inputs.Under high N application,EE and HNE cultivars could potentially increase maize yield by 8%-10% and reduce N input by 16%-21%.Under low N application,LNE cultivars could potentially increase maize yield by 12%.We concluded that breeding for N-efficient cultivars is a feasible strategy to increase maize yield and/or reduce N input. 关键词：氮肥利用效率玉米产量玉米杂交种东北地区华北品种选育评价优势

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Evaluation of the yield and nitrogen use efficiency of the dominant maize hybrids grown in North and Northeast China

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