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Effect of environmental conditions on the genotypic difference in nitrogen use efficiency in maize

文献类型: 外文期刊

作者: Cai Hong-Guang 1 ; Gao Qiang 3 ; Mi Guo-Hua 1 ; Chen Fan-Jun 1 ;

作者机构: 1.China Agr Univ, Key Lab Plant Nutr, MOA, Dept Plant Nutr, Beijing 100193, Peoples R China

2.Jilin Acad Agr Sci, Res Ctr Agr Environm & Resources, Changchun 130118, Peoples R China

3.Jilin Agr Univ, Changchun 130118, Peoples R China

关键词: Maize;N efficiency;soil;precipitation

期刊名称:AFRICAN JOURNAL OF BIOTECHNOLOGY ( 影响因子:0.573; 五年影响因子:0.794 )

ISSN: 1684-5315

年卷期: 2011 年 10 卷 59 期

页码:

收录情况: SCI

摘要: Selection for nitrogen (N) efficient cultivars is typically conducted under favorable field conditions with only difference in soil N availability. However, in practical field conditions, variation in soil types and/or seasonal weather conditions may have a strong influence on plant growth and therefore, N use efficiency. In the present study, a set of 3 genotypes (JD209, JD180 and SM25) were compared for their response to N inputs in two locations with different soil types in 2004 and 2005. It was found that maize yield in Xin-Li-Cheng with black soils was significantly higher than that in Qian-an with light chernozem soil. At the same location, maize yield in 2005 was higher than in 2004 because there was more rainfall in 2005. With sufficient N supplies (150 to 300 kg/ha), no difference in yield potential was observed among the 3 hybrids under the favorable soil and weather conditions. Nevertheless, genotypic difference in maize yield in response to N inputs was observed under varied soil types and rainfall conditions. N-efficient JD209 only showed low-N tolerance under unfavorable soil (light chernozem) and water shortage condition (in 2004). It is concluded that, identification of N-efficient cultivars should be conducted under multiple environments.

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