Nitrogen Application in Irrigated Rice Grown in Mediterranean Conditions: Effects on Grain Yield, Dry Matter Production, Nitrogen Uptake, and Nitrogen Use Efficiency

2009 ◽  
Vol 32 (9) ◽  
pp. 1574-1593 ◽  
Author(s):  
Pamela Artacho ◽  
Claudia Bonomelli ◽  
Francisco Meza
Keyword(s):  
Grain Yield ◽  
Nitrogen Uptake ◽  
Nitrogen Use Efficiency ◽  
Dry Matter ◽  
Nitrogen Application ◽  
Nitrogen Use ◽  
Irrigated Rice ◽  
Matter Production ◽  
Use Efficiency ◽  
Mediterranean Conditions

scholarly journals Influence of Biodegradable Polymer Coated Urea on Nitrogen Uptake and Utilization of Maize (Zea mays L)

2021 ◽  
pp. 297-306
Author(s):  
B. Balaganesh ◽  
P. Malarvizhi ◽  
N. Chandra Sekaran ◽  
P. Jeyakumar ◽  
K. R. Latha ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Uptake ◽  
Nitrogen Use Efficiency ◽  
Biodegradable Polymer ◽  
Dry Matter ◽  
Nitrogen Use ◽  
Urea Fertilizer ◽  
Coated Urea ◽  
Use Efficiency ◽  
Polymer Coated Urea

Controlled release nitrogen fertilizers could be an excellent management approach for improving nitrogen fertilizer efficiency. The present study aimed to investigate the effect of coated urea fertilizers to increase nitrogen uptake and utilization of maize. The nitrogen use efficiency of maize from various biodegradable polymer-coated urea fertilizers, such as palm stearin coated urea (PSCU), pine oleoresin coated urea (POCU), and humic acid coated urea (HACU), was determined in a pot culture experiment conducted at the Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, during 2021. The coating materials have been coated on urea with different coating thicknesses, viz., PSCU - 5, 10, 15%, POCU – 2, 4, 6%, and HACU - 5, 10, 15%. Among all the treatments, T11: HACU 15% produced highest grain yield (72.0g plant-1) followed by T7: POCU 4% (69.7 g plant-1) and T4: PSCU 10% (69.0g plant-1). In terms of dry matter production, T10: PSCU 10% produced maximum dry matter (186.5g plant-1), followed by T11: HACU 15% (186.2 g plant-1), and T7: POCU 4% (185.3g plant-1). The nitrogen uptake by the maize plant was higher in T7: POCU 4 % (1.62g plant-1), followed by T11: HACU 15% (1.59 g plant-1) and T4: PSCU 10% (1.59g plant-1). Irrespective of treatments, the highest nitrogen utilization by the maize crop was found in T7: POCU 4% (73.9%) followed by T4: PSCU 10% (71.1%) and T11: HACU 15% (70.9%) treatments. When compared to uncoated urea fertilizer, all coated urea fertilizers outperformed uncoated urea fertilizer in terms of grain yield, dry matter accumulation, and nitrogen uptake. To improve the nitrogen use efficiency, coated urea fertilizers prove to be a promising alternative to uncoated urea fertilizers.

scholarly journals Effect of Simulated Flooding and Nitrogen Application on Nitrogen Uptake of Rice

2017 ◽  
Vol 20 (1) ◽  
pp. 67-75
Author(s):  
JA Adjetey ◽  
QS Mulbah
Keyword(s):  
Water Resources ◽  
Grain Yield ◽  
Nitrogen Uptake ◽  
Nitrogen Use Efficiency ◽  
Production Systems ◽  
Rice Production ◽  
Lowland Rice ◽  
Nitrogen Application ◽  
Nitrogen Use ◽  
Use Efficiency

In lowland rice production systems, flooding patterns vary during the cropping period and this poses a serious challenge to productivity due to the effect of flooding on the availability and uptake of nitrogen. The aim of this study was to examine the influence of various flooding patterns on nitrogen use in rice grown under simulated wetland conditions. Rice was grown in a greenhouse at 0, 110 and 220 kg N ha-1 under well watered control conditions, continuous flooding, early flooding at tillering, and late flooding post-tillering. The results showed that continuous and early flooding increased tiller production and grain yield compared to late flooding or non-flooded conditions. Although the highest grain yields under the different flooding patterns were obtained with 220 kg N ha-1, the combination of 110 kg N ha-1 and early flooding also significantly increased tiller productivity, nitrogen recovery, and agronomic nitrogen use efficiency (NUE). There is the need to regulate the supply of nitrogen and water resources if grain yield and NUE has to be increased at minimal costs. Also, compared to well-watered conditions, rice production under flooded conditions lead to increased productivity and N rate must match realistic target yields. Best results are obtained when flooding occurs in the early rather than later parts of the season.Bangladesh Agron. J. 2017, 20(1): 67-75

Effect of in-season application methods of fertilizer nitrogen on grain yield and nitrogen use efficiency in maize

2004 ◽  
Vol 84 (2) ◽  
pp. 169-176 ◽  
Author(s):  
B. L. Ma ◽  
M. Li ◽  
L. M. Dwyer ◽  
G. Stewart
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Dry Matter ◽  
Foliar Spray ◽  
Soil N ◽  
Nitrogen Use ◽  
N Application ◽  
Maize Hybrids ◽  
Use Efficiency ◽  
Application Methods

Little information is available comparing agronomic performance and nitrogen use efficiency (NUE) for N application methods such as foliar spray, soil application, and ear injection in maize (Zea mays L.). The objective of this study was to investigate the effects of various N application methods on total stover dry matter, grain yield, and NUE of maize hybrids using a 15N-labeling approach. A field experiment was conducted on a Dalhousie clay loam in Ottawa and a Guelph loam in Guelph for 2 yr (1999 and 2000). Three N application methods were tested on two maize hybrids, Pioneer 3893 and Pioneer 38P06 Bt. At planting, 60 kg N ha-1 as ammonium nitrate was applied to all treatments. In addition, 6.5 kg N ha-1 and 13.5 kg N ha-1 as 15N-labeled urea were applied to either foliage (Treatment I) or soil (Treatment II) at V6 and V12 stages, respectively. In Treatment III, 20 kg N ha-1 as 15N-labeled urea was injected into space between ear and husks at silking. The results showed that compared with soil N application neither foliar spray nor injection through ear affected grain yield or stover dry matter. The NUE values ranged from 12 to 76% for N fertilizer applied at V6 a nd V12 stages, or at silking for all treatments. There was no interaction of hybrid × N application methods on any variables measured with the only exception that for soil N application, grain NUE in Pioneer 38P06 Bt was significant higher than in Pioneer 3893. The difference in total N and NUE of grain and stover between soil N application and foliar N spray was inconsistent. However, NUE was substantially higher for N injection through the ear than for foliar or soil application without differential responses between the two hybrids. Nitrogen injection through the ear at silking might have altered N redistribution within the plant and improved NUE. Hence, it can potentially enhance grain protein content. Foliar N spray is not advocated for maize production in Ontario. Key words: Maize, Zea mays, nitrogen application methods, nitrogen-15, yield, nitrogen use efficiency

Sign in / Sign up

Export Citation Format

Share Document