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- Title
Effects of Nitrogen Fertilizer on Different Japonica Rice Varieties Planted in the Hilly Land of Central Hubei Province.
- Authors
HOU Wen-feng; LI Xiao-kun; ZHUANG Guang-quan; GUO Hong-yan; YUAN Ying-chun; LU Jian-wei
- Abstract
A field trial was conducted in Dangyang City to compare the yield and nitrogen (N) use efficiency of 2 japonica rice varieties ( Zhongdao 1 and Huaidao 5) in the hilly land of central Hubei Province ( single-cropping indica rice area) under different N levels. The results showed that the grain yield of the treatments with N were increased averagely by 2 179 kg/hm² and 3 209 kg/hm², and the increase rates were 45.6% and 53.5%, respectively. Linear and platform correlations had been shown between yield and N fertilizer amount. The platform yields of "Zhongdao 1" and "Huaidao 5" were 7 517 kg/hm² and 10 234 kg/hm², respectively. The most suitable N application amount were 221.0 kg/hm² and 235.5 kg/hm², respectively. Compared with N0 treatment, the N uptakes by these 2 japonica rice varieties were averagely increased 58.7 kg/hm² and 71.8 kg/hm², and the increase rates were 80.9% and 85.2%. When the N application amount was 248 kg/hm², the N recovery efficiency (NRE), N agronomic efficiency (NAE), N contribution rate (NCR) and partial factor productivity of applied N (PFPN) of the 2 varieties were 29.4% and 37.6%, 10.6 kg/kg and 18.0 kg/kg, 35.4% and 42.6%, 29.8 kg/kg and 42.3 kg/kg. The result of comprehensive analysis believed that " Huaidao 5" could get a higher yield and high N use efficiency when planted in the hilly land of central Hubei Province.
- Subjects
RICE varieties; FERTILIZER application; NITROGEN fertilizers; GRAIN yields; CROPPING systems
- Publication
Journal of Agricultural Science & Technology (1008-0864), 2014, Vol 16, Issue 4, p127
- ISSN
1008-0864
- Publication type
Article
- DOI
10.13304/j.nykjdb.2014.017