Nitrogen use efficiency in selected rice (Oryza sativa L.) genotypes under different water regimes and nitrogen levels

Comparison of Response to Nitrogen between Upland NERICAs and ITA (Oryza sativa) Rice Varieties

“…The two year experiments showed that nitrogen fertilizer application significantly increased rice yield, as has been reported previously (Yoshida, 1983;Pinheiro and de Castro, 2000;Wang et al, 2002;Saito et al, 2006;Haefele et al, 2008). The mean grain yields increased from 2411 kg/ha with 0 N to 4842 kg/ha with 120 kgN/ha, suggesting that nitrogen fertilizer application is cardinal to increasing upland rice yields in Uganda.…”

Nitrogen Uptake and Utilization by No-Tillage Rice under Different Soil Moisture Conditions – A Model Study under Simulated Soil Conditions

“…Soil moisture mainly affected the fertilizer N uptake, but hardly affected the soil indigenous N uptake, and this conclusion is contrary to that reported by Haefele et al (2008). This may be responsible for the N fertilization at the surface of the soil under no-tillage, as well as the root distribution of rice in no-tillage cultivation being shallow (Jiang et al, 2005, Ren et al, 2007.…”

“…Reasonable water management not only greatly reduces water consumption in rice production, but also promotes the growth of rice roots (Qian et al, 2003), and improves the water and N utilization rate (Lin et al, 2006;Liu et al, 2009). Haefele et al (2008) showed that soil moisture mainly affected soil indigenous N uptake, but had little effect on fertilizer N uptake. However, studies on the fate of fertilizer N, as well as that of N uptake source and their relationship with grain yield, showed that the total N uptake and utilization by rice were both quite low under reduced soil moisture.…”

Growth and Yield of Rice (Oryza sativa L.) as Influenced by Different Crop Establishment Methods and Nitrogen Levels

“…Enhanced tillering by increased nitrogen application might be attributed to more nitrogen supply to plant at active tillering stage (Wani et al, 2016). These results were also in accordance with the findings of Haefele et al, (2008).…”