Organic Amendment and Soil Type Effects on Dry Matter Accumulation, Grain Yield, and Nitrogen Use Efficiency of Rice

2005 ◽  
Vol 28 (8) ◽  
pp. 1311-1322
Author(s):  
Joseph Ofori ◽  
Akira Kamidouzono ◽  
Tsugiyuki Masunaga ◽  
Toshiyuki Wakatsuki
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Soil Type ◽  
Dry Matter ◽  
Organic Amendment ◽  
Dry Matter Accumulation ◽  
Nitrogen Use ◽  
Use Efficiency

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

Nitrogen use efficiency characteristics of commercial potato cultivars

2004 ◽  
Vol 84 (2) ◽  
pp. 589-598 ◽  
Author(s):  
B. J. Zebarth ◽  
G. Tai ◽  
R. Tarn ◽  
H. de Jong ◽  
P. H. Milburn
Keyword(s):  
Nitrogen Use Efficiency ◽  
Dry Matter ◽  
Potato Cultivars ◽  
Utilization Efficiency ◽  
Dry Matter Accumulation ◽  
N Accumulation ◽  
Nitrogen Use ◽  
N Supply ◽  
Commercial Potato ◽  
Use Efficiency

One approach for reducing the contribution of potato (Solanum tuberosum L.) production to nitrate contamination of groundwater is to develop cultivars which utilize N more efficiently. In this study, variation in N use efficiency (NUE; dry matter production per unit crop N supply) characteristics of 20 commercial potato cultivars of North American and European origin were evaluated in 2 yr. Cultivars were grown with or without application of 100 kg N ha-1 as ammonium nitrate banded at planting. The recommended within-row spacing was used for each cultivar and no irrigation was applied. Plant dry matter and N accumulation were determined prior to significant leaf senescence. Crop N supply was estimated as fertilizer N applied plus soil inorganic N measured at planting plus apparent net soil N mineralization. Nitrogen use efficiency decreased curvilinearly with increasing crop N supply. Nitrogen use efficiency was lower for early-maturing cultivars compared to mid-season and late-maturing cultivars. A curvilinear relationship was obtained between plant dry matter accumulation and plant N accumulation using data for all cultivars. Deviations from this relationship were interpreted as variation in N utilization efficiency (NUtE; dry matter accumulation per unit N accumulation). Significant differences in NUtE were measured among cultivars of similar maturity. Nitrogen uptake efficiency (NUpE; plant N content per unit crop N supply) and soil nitrate concentration measured at plant harvest were uniformly low for all cultivars when crop N supply was limited, but varied among cultivars when N was more abundant. This suggests that potato cultivars vary more in terms of N uptake capacity (plant N accumulation in the presence of an abundant N supply) than in terms of NUpE. Key words: Solanum tuberosum, N mineralization, dry matter accumulation, N accumulation, N utilization efficiency

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.

Grain Yield and Nitrogen Use Efficiency of Mid-seasonIndicaRice Cultivars Applied at Different Decades

2015 ◽  
Vol 41 (3) ◽  
pp. 422 ◽  
Author(s):  
Cheng-Xin JU ◽  
Jin TAO ◽  
Xi-Yang QIAN ◽  
Jun-Fei GU ◽  
Bu-Hong ZHAO ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Use ◽  
Use Efficiency

Effect of In-Season Nitrogen Management Strategy on Maize Grain Yield and Nitrogen Use Efficiency

2011 ◽  
Vol 37 (1) ◽  
pp. 152-157 ◽  
Author(s):  
You-Liang YE ◽  
Yu-Fang HUANG ◽  
Chun-Sheng LIU ◽  
Ri-Tao QU ◽  
Hai-Yan SONG ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Management Strategy ◽  
Nitrogen Management ◽  
Nitrogen Use ◽  
Maize Grain Yield ◽  
Use Efficiency ◽  
Maize Grain
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