Higher yields of hybrid rice do not depend on nitrogen fertilization under moderate to high soil fertility conditions

Autor: Min Huang, Peng Jiang, Shuanglü Shan, Wei Gao, Guohui Ma, Yingbin Zou, Norman Uphoff, Longping Yuan
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Rice, Vol 10, Iss 1, Pp 1-5 (2017)
Druh dokumentu: article
ISSN: 1939-8425
1939-8433
DOI: 10.1186/s12284-017-0182-1
Popis: Abstract Background Increasing rice yield with fewer external inputs is critical to ensuring food security, reducing environmental costs, and improving returns. Use of hybrid rice has expanded greatly in China due to its higher yield potential. Meanwhile, large and increasing amounts of nitrogen (N) fertilizers have been used for expanding rice production in China. It is not clear to what extent the success of hybrid rice in China is associated with N fertilizer inputs. Findings We observed that the higher grain yield with N fertilizer in hybrid rice was driven more by a higher yield without N fertilizer than by increases in grain yield with N fertilizer under moderate to high soil fertility conditions. Conclusions Our results suggest that greater application of N fertilizers is not needed to benefit from hybrid rice production under moderate to high soil fertility conditions, and that improving and maintaining soil fertility should be a focus for sustaining hybrid rice production. Moreover, our study also indicates that zero-N testing may be a potentially useful tool to develop hybrid rice with high yield and without requirement of greater external N inputs under moderate to high soil fertility conditions.
Databáze: Directory of Open Access Journals
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