scholarly journals UTİLİZATİON OF FMN07 AND FGN37 MİCROMONOSPORA SP. İN REGULATİNG THE NİTROGEN LOSS DURİNG COMPOSTİNG

2019 ◽  
Author(s):  
Fadime Özdemir Koçak ◽  
Levent Değirmenci
Keyword(s):  
Nitrogen Loss

scholarly journals Foliar Urea with N-(n-butyl) Thiophosphoric Triamide for Sustainable Yield and Quality of Pineapple in a Controlled Environment

2021 ◽  
Vol 13 (12) ◽  
pp. 6880
Author(s):  
Mohammad Amdadul Haque ◽  
Siti Zaharah Sakimin ◽  
Phebe Ding ◽  
Noraini Md. Jaafar ◽  
Mohd Khanif Yusop ◽  
...  
Keyword(s):  
Nitrogen Loss ◽  
Growth Yield ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Urea Solution ◽  
Urease Inhibitor ◽  
N Losses ◽  
N Accumulation ◽  
Yield And Quality

In agricultural production, nitrogen loss leads to economic loss and is a high environmental risk affecting plant growth, yield, and quality. Use of the N fertilizer with a urease inhibitor is thus necessary to minimize N losses and increase the efficiency of N. This study aimed to evaluate the effects of N-(n-butyl) Thiophosphoric Triamide (NBPT) on the growth, yield, and quality of pineapple. The experiment involved two foliar fertilizer treatments: 1% (w/v) urea solution with NBPT (2.25 mL kg−1 urea) was treated as NLU (NBPT Liquid Urea), and the same concentration of urea without NBPT served as the control. Both were applied 12 times, starting 1 month after planting (MAP) and continuing once a month for 12 months. The application of urea with NBPT notably increased the above-ground dry biomass per plant (20% and 10% at 8 and 12 MAP, respectively), leaf area per plant (23% and 15% at 8 and 12 MAP, respectively), N accumulation per plant (10%), PFPN (Partial Factor Productivity) (13%), and average fruit weight (15%) compared to the treatment with urea alone (control). The analysis of quality parameters indicated that urea with NBPT improves TSS (Total Soluble Solids) (19%), ascorbic acid (10%), and sucrose (14%) but reduces the total organic acid content (21%) in pineapple. When using urea with a urease inhibitor (NBPT), there was a significant improvement in growth, yield, quality, and nitrogen use efficiency, with the additional benefit of reduced nitrogen losses, in combination with easy handling. Hence, urea with a urease inhibitor can be used as a viable alternative for increasing pineapple yield by boosting growth with better fruit quality.

scholarly journals Microbial niche differentiation explains nitrite oxidation in marine oxygen minimum zones

2021 ◽  
Author(s):  
Xin Sun ◽  
Claudia Frey ◽  
Emilio Garcia-Robledo ◽  
Amal Jayakumar ◽  
Bess B. Ward
Keyword(s):  
Nitrogen Loss ◽  
Niche Differentiation ◽  
Nitrite Reduction ◽  
Nitrite Oxidation ◽  
Fixed Nitrogen ◽  
Anoxic Waters ◽  
Biogeochemical Models ◽  
Nitrite Oxidizing Bacteria ◽  
Oxygen Addition ◽  
Oxygen Minimum

AbstractNitrite is a pivotal component of the marine nitrogen cycle. The fate of nitrite determines the loss or retention of fixed nitrogen, an essential nutrient for all organisms. Loss occurs via anaerobic nitrite reduction to gases during denitrification and anammox, while retention occurs via nitrite oxidation to nitrate. Nitrite oxidation is usually represented in biogeochemical models by one kinetic parameter and one oxygen threshold, below which nitrite oxidation is set to zero. Here we find that the responses of nitrite oxidation to nitrite and oxygen concentrations vary along a redox gradient in a Pacific Ocean oxygen minimum zone, indicating niche differentiation of nitrite-oxidizing assemblages. Notably, we observe the full inhibition of nitrite oxidation by oxygen addition and nitrite oxidation coupled with nitrogen loss in the absence of oxygen consumption in samples collected from anoxic waters. Nitrite-oxidizing bacteria, including novel clades with high relative abundance in anoxic depths, were also detected in the same samples. Mechanisms corresponding to niche differentiation of nitrite-oxidizing bacteria across the redox gradient are considered. Implementing these mechanisms in biogeochemical models has a significant effect on the estimated fixed nitrogen budget.

Strong turbulence accelerates sediment nitrification-denitrification for nitrogen loss in shallow lakes

2020 ◽  
pp. 143210
Author(s):  
Lin Zhu ◽  
Wenqing Shi ◽  
Jian Zhou ◽  
Jianghua Yu ◽  
Lingwei Kong ◽  
...  
Keyword(s):  
Shallow Lakes ◽  
Nitrogen Loss ◽  
Strong Turbulence

Investigation of nitrogen loss during laboratory scale fixed-bed drying of digestate

2021 ◽  
Vol 129 ◽  
pp. 26-34
Author(s):  
Werner Berg ◽  
Razieh Salamat ◽  
Holger Scaar ◽  
Jochen Mellmann
Keyword(s):  
Nitrogen Loss ◽  
Fixed Bed ◽  
Laboratory Scale

Diversity of anammox bacteria and contribution to the nitrogen loss in surface sediment

2019 ◽  
Vol 142 ◽  
pp. 227-234 ◽  
Author(s):  
Jiapeng Wu ◽  
Yiguo Hong ◽  
Jiaqi Ye ◽  
Yiben Li ◽  
Xiaohan Liu ◽  
...  
Keyword(s):  
Surface Sediment ◽  
Nitrogen Loss ◽  
Anammox Bacteria

Excess nitrogen accumulation in activated sludge in sequencing batch reactor with a single-stage oxic process

2009 ◽  
Vol 59 (3) ◽  
pp. 573-582 ◽  
Author(s):  
Xiao-ming Li ◽  
Dong-bo Wang ◽  
Qi Yang ◽  
Wei Zheng ◽  
Jian-bin Cao ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Sequencing Batch Reactor ◽  
Ph Value ◽  
Batch Reactor ◽  
Nitrogen Loss ◽  
Single Stage ◽  
Synthetic Wastewater ◽  
Nitrogen Accumulation ◽  
Excess Nitrogen

It was occasionally found that a significant nitrogen loss in solution under neutral pH value in a sequencing batch reactor with a single-stage oxic process using synthetic wastewater, and then further studies were to verify the phenomenon of nitrogen loss and to investigate the pathway of nitrogen removal. The result showed that good performance of nitrogen removal was obtained in system. 0–7.28 mg L−1 ammonia, 0.08–0.38 mg L−1 nitrite and 0.94–2.12 mg L−1 nitrate were determined in effluent, respectively, when 29.85–35.65 mg L−1 ammonia was feeding as the sole nitrogen source in influent. Furthermore, a substantial nitrogen loss in solution (95% of nitrogen influent) coupled with a little gaseous nitrogen increase in off-gas (7% of nitrogen influent) was determined during a typical aerobic phase. In addition, about 322 mg nitrogen accumulation (84% of nitrogen influent) was detected in activated sludge. Based on nitrogen mass balance calculation, the unaccounted nitrogen fraction and the ratio of nitrogen accumulation in sludge/nitrogen loss in solution were 14.6 mg (3.7% of nitrogen influent) and 0.89, respectively. The facts indicated that the essential pathway of nitrogen loss in solution in this study was excess nitrogen accumulation in activated sludge.

scholarly journals Chronic TNF Infusion Causes Anorexia But Not Accelerated Nitrogen Loss

1989 ◽  
Vol 209 (1) ◽  
pp. 19-24 ◽  
Author(s):  
HAMISH R. MICHIE ◽  
MATTHEW L. SHERMAN ◽  
DAVID R. SPRIGGS ◽  
MARY CHRISTIE ◽  
DOUGLAS W. WILMORE ◽  
...  
Keyword(s):  
Nitrogen Loss

Streamflow nitrogen loss following forest fertilization in a southern Vancouver Island watershed

1985 ◽  
Vol 15 (1) ◽  
pp. 34-41 ◽  
Author(s):  
Eugene D. Hetherington
Keyword(s):  
Water Quality ◽  
Nitrogen Loss ◽  
Vancouver Island ◽  
Soil Permeability ◽  
Creek Watershed ◽  
Second Growth ◽  
Nitrogen Concentrations ◽  
Steep Slopes ◽  
Fall Application ◽  
Small Tributary

Water quality was monitored in the Lens Creek watershed on southern Vancouver Island to determine nitrogen loss following fall application of 224 kg N/ha urea fertilizer on a second-growth Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) forest. Peak nitrogen concentrations measured in two small tributary streams were 14 mg/L as urea, 1.9 mg/L as ammonia, and 9.3 mg/L as nitrate. For the first 14 months, estimated nitrogen outputs in excess of background amounts were 5.9 and 14.5% of the total applied nitrogen for the two subsidiary watersheds with 46 and 80% of their drainage areas fertilized, respectively. These losses were considerably higher than amounts of less than 1% previously reported for western North America. Increased levels of urea N and ammonia N were short-lived, while nitrate N remained above background levels for the study duration. Reasons for the high nitrogen loss include nitrification of the urea during 7 weeks of mild, dry weather following fertilization, presence of alder and swampy areas adjacent to the streams, high soil permeability, steep slopes, and abundant, above average early winter rainfall. The watersheds had been previously fertilized, but any influence of this first fertilization on nitrogen loss during the present study is unknown. Lens Creek water quality was not adversely affected by the fertilization in terms of drinking water standards or toxicity to fish.

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