scholarly journals Differential Performance of Individual and Consortial Endophytes for Enhanced Rice Yield and Agronomic N-Use Efficiency in Open-Fields in the Nile Delta

2019 ◽  
Vol 2 (8) ◽  
pp. 99-119
Author(s):  
Youssef G Yanni ◽  
Frank B Dazzo ◽  
Abdelgawad Y Elsadany
Keyword(s):  
Nile Delta ◽  
Rice Yield ◽  
N Use Efficiency ◽  
Differential Performance ◽  
Agronomic N Use Efficiency ◽  
Use Efficiency ◽  
N Use ◽  
Open Fields

scholarly journals No evidence for higher agronomic N use efficiency or lower nitrous oxide emissions from enhanced efficiency fertilisers in aerobic subtropical rice

2018 ◽  
Vol 225 ◽  
pp. 47-54 ◽  
Author(s):  
Terry J. Rose ◽  
Peter Quin ◽  
Stephen G. Morris ◽  
Lee J. Kearney ◽  
Stephen Kimber ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
N Use Efficiency ◽  
Nitrous Oxide Emissions ◽  
Agronomic N Use Efficiency ◽  
Use Efficiency ◽  
N Use

Mixing groundnut residues and rice straw to improve rice yield and N use efficiency

2009 ◽  
Vol 110 (2) ◽  
pp. 130-138 ◽  
Author(s):  
W. Kaewpradit ◽  
B. Toomsan ◽  
G. Cadisch ◽  
P. Vityakon ◽  
V. Limpinuntana ◽  
...  
Keyword(s):  
Rice Straw ◽  
Rice Yield ◽  
N Use Efficiency ◽  
Use Efficiency ◽  
N Use

scholarly journals Effect of deep placement of nitrogen fertilizers on rice yield and N use efficiency under water regimes

2016 ◽  
Vol 13 (2) ◽  
pp. 161-172 ◽  
Author(s):  
S Das ◽  
MR Islam ◽  
M Sultana ◽  
H Afroz ◽  
MA Hashem
Keyword(s):  
Rice Yield ◽  
N Uptake ◽  
N Use Efficiency ◽  
Deep Placement ◽  
Water Regimes ◽  
Continuous Flooding ◽  
N Fertilizers ◽  
N Concentration ◽  
Use Efficiency ◽  
N Use

The experiments were conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during boro season of 2013 to evaluate the effect of deep placement of nitrogen (N) fertilizers on rice yield and N use efficiency under two different water regimes [continuous flooding (CF) and alternate wetting and drying (AWD)]. After deep placement of USG and NPK briquettes and each split application of PU, the water samples were collected for five consecutive days and analyzed for ammonium-Nitrogen (NH4-N) concentration. In both water regimes the floodwater NH4-N concentration gave highest value at the second day of PU application followed by gradual decrease with time and in continuous flooding condition the release of NH4-N was higher compared to AWD condition. Deep placement of N fertilizers also increased grain yield under AWD compared to CF condition and the maximum value was obtained in treatment T5 [USG 78 kg N ha-1 + PM 3 t ha-1] statistically similar to T3 [USG, 156 kg N ha-1]. Due to application USG and NPK briquettes, the N uptake and N use efficiency also gave higher values in AWD compared to CF condition. The results revealed that the deep placement of USG with poultry manure performed better in terms yield, N uptake and N use efficiency by BRRI dhan29 under AWD condition. So, the deep placement of USG under AWD condition could be recommended for higher production of boro rice.SAARC J. Agri., 13(2): 161-172 (2015)

scholarly journals Effects of Dense Planting with Less Basal N Fertilization on Rice Yield, N Use Efficiency and Greenhouse Gas Emissions

2015 ◽  
Vol 17 (06) ◽  
pp. 1091-1100 ◽  
Author(s):  
Xiangcheng Zhu ◽  
Xiaofei Wang ◽  
Zhijie Li ◽  
Aixing Deng ◽  
Zhenping Zhang ◽  
...  
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Rice Yield ◽  
N Fertilization ◽  
N Use Efficiency ◽  
Gas Emissions ◽  
Use Efficiency ◽  
N Use

scholarly journals Optimization of Topdressing for Winter Wheat by Accurate Growth Monitoring and Improved Production Estimation

2021 ◽  
Vol 13 (12) ◽  
pp. 2349
Author(s):  
Jingchun Ji ◽  
Jianli Liu ◽  
Jingjing Chen ◽  
Yujie Niu ◽  
Kefan Xuan ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Crop Production ◽  
Optimization Method ◽  
Growth Potential ◽  
N Use Efficiency ◽  
Growth Monitoring ◽  
Aerial Vehicle ◽  
Use Efficiency ◽  
Improved Model ◽  
N Use

Topdressing accounts for approximately 40% of the total nitrogen (N) application of winter wheat on the Huang-Huai-Hai Plain in China. However, N use efficiency of topdressing is low due to the inadaptable topdressing method used by local farmers. To improve the N use efficiency of winter wheat, an optimization method for topdressing (THP) is proposed that uses unmanned aerial vehicle (UAV)-based remote sensing to accurately acquire the growth status and an improved model for growth potential estimation and optimization of N fertilizer amount for topdressing (NFT). The method was validated and compared with three other methods by a field experiment: the conventional local farmer’s method (TLF), a nitrogen fertilization optimization algorithm (NFOA) proposed by Raun and Lukina (TRL) and a simplification introduced by Li and Zhang (TLZ). It shows that when insufficient basal fertilizer was provided, the proposed method provided as much NFT as the TLF method, i.e., 25.05% or 11.88% more than the TRL and TLZ methods and increased the yields by 4.62% or 2.27%, respectively; and when sufficient basal fertilizer was provided, the THP method followed the TRL and TLZ methods to reduce NFT but maintained as much yield as the TLF method with a decrease of NFT by 4.20%. The results prove that THP could enhance crop production under insufficient N preceding conditions by prescribing more fertilizer and increase nitrogen use efficiency (NUE) by lowering the fertilizer amount when enough basal fertilizer is provided.

INFLUENCE OF THE SYSTEM OF RICE INTENSIFICATION ON RICE YIELD AND NITROGEN AND WATER USE EFFICIENCY WITH DIFFERENT N APPLICATION RATES

2009 ◽  
Vol 45 (3) ◽  
pp. 275-286 ◽  
Author(s):  
LIMEI ZHAO ◽  
LIANGHUAN WU ◽  
YONGSHAN LI ◽  
XINGHUA LU ◽  
DEFENG ZHU ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
N Use Efficiency ◽  
System Of Rice Intensification ◽  
N Application ◽  
Application Rates ◽  
Rice Intensification ◽  
Use Efficiency ◽  
N Rates ◽  
N Use

SUMMARYField experiments were conducted in 2005 and 2006 to investigate the impacts of alternative rice cultivation systems on grain yield, water productivity, N uptake and N use efficiency (ANUE, agronomic N use efficiency; PFP, partial factor productivity of applied N). The trials compared the practices used with the system of rice intensification (SRI) and traditional flooding (TF). The effects of different N application rates (0, 80, 160 and 240 kg ha−1) and of N rates interacting with the cultivation system were also evaluated. Resulting grain yields with SRI ranged from 5.6 to 7.3 t ha−1, and from 4.1 to 6.4 t ha−1 under TF management. On average, grain yields under SRI were 21% higher in 2005 and 22% higher in 2006 than with TF. Compared with TF, SRI plots had higher harvest index across four fertilizer N rates in both years. However, there was no significance difference in above-ground biomass between two cultivation systems in either year. ANUE was increased significantly under SRI at 80 kg N ha−1 compared with TF, while at higher N application rates, ANUE with SRI was significantly lower than TF. Compared with TF, PFP under SRI was higher across all four N rates in both years, although the difference at 240 kg N ha−1 was not significant. As N rate increased, the ANUE and PFP under both SRI and TF significantly decreased. Reduction in irrigation water use with SRI was 40% in 2005 and 47% in 2006, and water use efficiency, both total and from irrigation, were significantly increased compared to TF. With both SRI and TF, the highest N application was associated with decreases in grain yield, N use efficiency and water use efficiency. This is an important finding given current debates whether N application rates in China are above the optimum, especially considering consequences for soil and water resources. Cultivation system, N rates and their interactions all produced significant differences in this study. Results confirmed that optimizing fertilizer N application rates under SRI is important to increase yield, N use efficiency and water use efficiency.

Sign in / Sign up

Export Citation Format

Share Document