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

文献类型： 外文期刊

第一作者： Cai Hong-Guang

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

作者机构：

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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