scholarly journals Effects of Planting Density and Basal Nitrogen Fertilizer on Grain Yield, Quality, Taste of Rice Cultivar in Aomori Prefecture

2019 ◽  
Vol 88 (2) ◽  
pp. 89-97
Author(s):  
Toshiyuki Kimura ◽  
Hiroyuki Shimono
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilizer ◽  
Rice Cultivar ◽  
Planting Density ◽  
Yield Quality ◽  
Aomori Prefecture

scholarly journals Nitrogen Effects on Yield, Quality and Physiological Characteristics of Giant Rice

Agronomy ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1816
Author(s):  
Jisheng Zhang ◽  
Tianyi Tong ◽  
Pouwedeou Mouloumdema Potcho ◽  
Suihua Huang ◽  
Lin Ma ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilizer ◽  
Nitrogen Fertilizers ◽  
Utilization Rate ◽  
Rice Varieties ◽  
Area Index ◽  
Biological Yield ◽  
Yield Quality ◽  
Set Up ◽  
High Level

In China, the quantity of nitrogen fertilizer applied is large, but as a consequence of a high level of loss, its utilization rate is low. Compared to common rice, the new giant rice has interesting characteristics, namely high biological yield and good efficient use of fertilizer. However, it becomes urgent to further consider the appropriate rate of nitrogen fertilizer to be applied. The giant rice varieties Feng5 and Feng6 were set up in a pot experiment and a field experiment under five doses of nitrogen fertilizers, namely, 0 kg·ha−1 (CK), 75 kg·ha−1 (T1), 150 kg·ha−1 (T2), 225 kg·ha−1 (T3) and 300 kg·ha−1 (T4). Parameters such as leaf area index (LAI), lodging index (LI), nitrogen utilization rate, photosynthesis rate and grain yield were measured. The results showed that with the increase of nitrogen dose in a certain range, LAI, plant height, the number of tillers, net photosynthetic rate (NPn), the transpiration rate (Tr), and the grain yield increased while the lodging index (LI), the nitrogen agronomic utilization rate (AE) and nitrogen partial productivity (PFPN) decreased. Additionally, with the increase of nitrogen application, the grain yield index (HI) and nitrogen contribution rate (FCRN) of rice presented a parabolic trend.

Use of Nitrogen Fertilizer in a Targeted Way to Improve Grain Yield, Quality, and Nitrogen Use Efficiency

2015 ◽  
Vol 107 (3) ◽  
pp. 903-915 ◽  
Author(s):  
Peter Hooper ◽  
Yi Zhou ◽  
David R. Coventry ◽  
Glenn K. McDonald
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Fertilizer ◽  
Nitrogen Use ◽  
Use Efficiency ◽  
Yield Quality

Agronomic comparison of Minnesota-adapted dwarf oat with semi-dwarf, intermediate, and tall oat lines adapted to northern growing conditions

1996 ◽  
Vol 76 (4) ◽  
pp. 727-734 ◽  
Author(s):  
Pirjo Mäkelä ◽  
Leena Väärälä ◽  
Pirjo Peltonen-Sainio
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilizer ◽  
Fertilizer Application ◽  
The Other ◽  
Planting Density ◽  
Yield Potential ◽  
Yield Reduction ◽  
Seeding Rate ◽  
Main Shoot ◽  
Growing Conditions

Development of a dwarf oat (Avena sativa L.) for northern growing conditions may further improve many important agronomic features of the oat crop including lodging resistance, yield stability, yield potential, grain-straw ratio, and fertile tillering. Our objective in this study was to assess the performance of a Minnesota-adapted dwarf line at high latitudes, through measurement of several traits that characterize duration of pre- and post-anthesis growth and plant stand structure, with special reference to tiller growth and tiller productivity. Response of the dwarf line to seeding rate (250, 500, and 750 viable seeds m−2) and nitrogen fertilizer application rates (80, 120, and 160 kg N ha−1) was compared with that of a semi-dwarf line, a conventional height cultivar, and a landrace cultivar, all of which are adapted to long-day conditions. The experiments were conducted in Finland (60°13′N) in 1993 and 1994. The dwarf line produced less grain (≤ 30%) than the other lines but out-yielded the lodging-sensitive landrace in 1994 at a high seeding rate and high rate of nitrogen fertilizer application. As for the semi-dwarf line and conventional height line, the dwarf line produced the highest grain yield at 500 seeds m−2 which is the standard planting density for oat in Finland. The particularly short duration of the generative phase and associated low number of grains per main shoot panicle are likely to be principal contributors to low mean panicle-filling rate, panicle weight, and grain yield of the dwarf line. However it was better able to tiller and produce head-bearing tillers than the other lines. This increased number of tillers was, however, unable to compensate for yield reduction resulting from low yield potential of the main shoot. Key words:Avena sativa L., oat (dwarf), grain yield, landrace, partitioning, straw length, yield components

scholarly journals Effect of Nitrogen Fertilizer Levels on the Incidence of Insect Pests in Four Rice Cultivars

2020 ◽  
pp. 348-357
Author(s):  
I. Paramasiva ◽  
U. Vineetha ◽  
Ch. Sreelakshmi ◽  
P. N. Harathi
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilizer ◽  
Agricultural Research ◽  
Inorganic Nitrogen ◽  
Gall Midge ◽  
Stem Borer ◽  
Rice Cultivar ◽  
Research Station ◽  
Rice Cultivars ◽  
Nitrogen Levels

Aim: To determine the effect of local rice cultivars and inorganic nitrogen fertilizer on the incidence of stem borer, Scirpophaga incertulas (Walker); leaffolder, Cnephalocrocis medinalis (Guenee); and gall midge, Orseolia oryzae (Wood Mason) and on grain yield of rice. Study Design: A field experiment for two consecutive years was carried out in a split-plot arrangement in randomized block design with three replications. Place and duration of the study: Department of Entomology, Agricultural Research Station, Nellore, Andhra Pradesh, India during Kharif, 2013 and 2014. Methodology: The rice cultivars (NLR 20104, NLR 20106, NLR 3135 and NLR 33892) were attributed to experimental main plots and nitrogen levels (40, 80, 120, 160 and 200 kg ha-1) to the sub plots. Observations on incidence of stem borer, gall midge and leaf folder was recorded in randomly selected 10 hills per subplot in replication and percent incidence was calculated. Results: The pest incidence for the treatments with high N rate as 160 and 200 kg/ha was higher (31.43 & 43.86% stem borer, 9.23 & 13.59% leaffolder and 2.75 & 3.00% gall midge, respectively) than that for lower N rate i.e. 40 and 80 kg ha-1 (19.24 & 20.04% stem borer, 7.37 & 7.95% leaffolder and 1.42 & 1.93% gall midge, respectively). Different rice cultivars significantly influenced the leaffolder incidence but not the stem borer and gall midge incidence. The Highest leaffolder incidence (13.44%) was noticed in NLR 20104 cultivar which was followed by NLR 3135 cultivar with 9.64% leaffolder incidence. Gall midge and leaffolder incidence was not significantly influenced by the combined effect of rice cultivar and nitrogen levels; in contrast, interaction effect has a significant influence on stem borer incidence. Significantly lowest stem borer incidence (18.21%) was noticed with NLR 3135 rice cultivar treated with 40 N ha-1, which was statistically on par with the NLR 20106 rice cultivar treated with 40 kg N ha-1 (18.23%) and NLR 20104 rice cultivar treated with 40 kg N ha-1 (19.76%). Among the different cultivarscultivar, NLR 33892 cultivarhad produced significantly highest grain yield (5955 kg ha-1) may be for having higher physiological indices. The highest/optimum grain yield (5726 kg ha-1) produced by plots that received 120 kg N ha-1. Further increase in nitrogen level beyond 120 kg ha-1 did not significantly improve the grain yield. Optimal N rate was revealed to be 120 kg ha-1 for four rice cultivars for reducing the stem borer/leaffolder/gall midge incidence so as to minimize the cost of inputs for pest control measures and for achieving high grain yield. Conclusions: The incremental doses of nitrogen fertilizer significantly enhanced stem borer, leaffolder and gall midge infestation on rice, which further affects the grain yields.

Effect of N management approaches and planting densities on nitrogen accumulation by transplanted rice

2005 ◽  
Vol 53 (4) ◽  
pp. 405-415 ◽  
Author(s):  
P. Janaki ◽  
T. M. Thiyagarajan
Keyword(s):  
Grain Yield ◽  
Uptake Rate ◽  
Aboveground Biomass ◽  
N Uptake ◽  
Planting Density ◽  
Transplanted Rice ◽  
The Mean ◽  
N Uptake Rate ◽  
Management Approaches ◽  
N Management

Field experiments were conducted during 1998 and 1999 in June-September with rice variety ASD18 at the wetland farm, Tamil Nadu Agricultural University, Coimbatore, India to find out theeffect of N management approaches and planting densities on N accumulation by transplanted rice in a split plot design.The main plot consisted of three plant populations (33, 66 and 100 hills m-2) and the sub-plot treatments of five N management approaches. The results revealed thatthe average N uptake in roots and aboveground biomass progressively increased with growth stages. The mean root and aboveground biomass Nuptake were 26.1 to 130.6 and 6.4 to 17.8 kg ha-1, respectively. The N uptake of grain and straw was higher in theSesbania rostratagreen manuring + 150 kg N treatment, but it was not effective in increasing the grain yield. The mean total N uptake was found to be significantly lower at 33 hills m-2(76.9 kg ha-1) and increased with an increase in planting density (100.9 and 117.2 kg ha-1at 66 and 100 hills m-2density). N application had a significant influence on N uptake and the time course of N uptake in all the SPAD-guided N approaches. A significant regression coefficient was observed between the crop N uptake and grain yield. The relationship between cumulative N uptake at the flowering stage and the grain yield was quadratic at all three densities. The N uptake rate (µN) was maximum during the active tillering to panicle initiation period and declined sharply after that. In general, µNincreased with an increase in planting density and the increase was significant up to the panicle initiation to flowering period.thereafter, the N uptake rate was similar at densities of 66 and 100 hills m-2.

Effects of Split Application of Nitrogen Fertilizer on Yield, Quality and Nitro-gen Use Efficiency of Sweet Potato

2018 ◽  
Vol 44 (12) ◽  
pp. 1858 ◽  
Author(s):  
Jian-Gang AN ◽  
Fu JING ◽  
Yi DING ◽  
Yi XIAO ◽  
Hao-Hao SHANG ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Nitrogen Fertilizer ◽  
Split Application ◽  
Use Efficiency ◽  
Yield Quality

scholarly journals Evaluation of prophylactic fungicide application timing on soybean (glycine max) grain yield, quality, and economic return in Mississippi

cftm ◽  
2021 ◽  
Author(s):  
Chase Alan Floyd ◽  
J Trent Irby ◽  
Tom W. Allen ◽  
Angus L. Catchot ◽  
Darrin M. Dodds ◽  
...  
Keyword(s):  
Glycine Max ◽  
Grain Yield ◽  
Economic Return ◽  
Application Timing ◽  
Fungicide Application ◽  
Yield Quality
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