Chitin combined with selenium reduced nitrogen loss in soil and improved nitrogen uptake efficiency in Guanxi pomelo orchard

2021 ◽  
pp. 149414
Author(s):  
Ting Zhan ◽  
Chengxiao Hu ◽  
Qingbo Kong ◽  
Guangyu Shi ◽  
Yanni Tang ◽  
...  
Keyword(s):  
Nitrogen Uptake ◽  
Nitrogen Loss ◽  
Nitrogen Uptake Efficiency ◽  
Uptake Efficiency ◽  
Reduced Nitrogen

Soil Temperature, Nitrogen Concentration, and Residence Time Affect Nitrogen Uptake Efficiency in Citrus

2002 ◽  
Vol 31 (3) ◽  
pp. 759 ◽  
Author(s):  
J. M. S. Scholberg ◽  
L. R. Parsons ◽  
T. A. Wheaton ◽  
B. L. McNeal ◽  
K. T. Morgan
Keyword(s):  
Soil Temperature ◽  
Residence Time ◽  
Nitrogen Uptake ◽  
Nitrogen Concentration ◽  
Nitrogen Uptake Efficiency ◽  
Uptake Efficiency

Nitrogen and Irrigation Management Practices to Improve Nitrogen Uptake Efficiency and Minimize Leaching Losses

2006 ◽  
Vol 15 (2) ◽  
pp. 369-420 ◽  
Author(s):  
A. K. Alva ◽  
S. Paramasivam ◽  
A. Fares ◽  
J. A. Delgado ◽  
D. Mattos ◽  
...  
Keyword(s):  
Nitrogen Uptake ◽  
Management Practices ◽  
Irrigation Management ◽  
Leaching Losses ◽  
Nitrogen Uptake Efficiency ◽  
Uptake Efficiency

Effects of 15N application frequency on nitrogen uptake efficiency in Citrus trees

2003 ◽  
Vol 160 (12) ◽  
pp. 1429-1434 ◽  
Author(s):  
A.n.a. Quiñones ◽  
Josefina Bañuls ◽  
Eduardo Primo Millo ◽  
Francisco Legaz
Keyword(s):  
Nitrogen Uptake ◽  
Nitrogen Uptake Efficiency ◽  
Uptake Efficiency ◽  
Application Frequency ◽  
Citrus Trees

scholarly journals In-Field Observation of Root Growth and Nitrogen Uptake Efficiency of Winter Oilseed Rape

Agronomy ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 105
Author(s):  
Julien Louvieaux ◽  
Antoine Leclercq ◽  
Loïc Haelterman ◽  
Christian Hermans
Keyword(s):  
Root Growth ◽  
Oilseed Rape ◽  
Root Development ◽  
Nitrogen Uptake ◽  
Root Morphology ◽  
Growth Stages ◽  
Winter Oilseed Rape ◽  
Nitrogen Uptake Efficiency ◽  
Uptake Efficiency ◽  
N Concentration

Field trials were conducted with two nitrogen applications (0 or 240 kg N ha−1) and three modern cultivars of winter oilseed rape (Brassica napus L.) previously selected from a root morphology screen at a young developmental stage. The purpose is to examine the relationship between root morphology and Nitrogen Uptake Efficiency (NUpE) and to test the predictiveness of some canopy optical indices for seed quality and yield. A tube-rhizotron system was used to incorporate below-ground root growth information. Practically, clear tubes of one meter in length were installed in soil at an angle of 45°. The root development was followed with a camera at key growth stages in autumn (leaf development) and spring (stem elongation and flowering). Autumn was a critical time window to observe the root development, and exploration in deeper horizons (36–48 cm) was faster without any fertilization treatment. Analysis of the rhizotron images was challenging and it was not possible to clearly discriminate between cultivars. Canopy reflectance and leaf optical indices were measured with proximal sensors. The Normalized Difference Vegetation Index (NDVI) was a positive indicator of biomass and seed yield while the Nitrogen Balance Index (NBI) was a positive indicator of above-ground biomass N concentration at flowering and seed N concentration at harvest.

Improving nitrogen uptake efficiency by chitin nanofiber promotes growth in tomato

2020 ◽  
Vol 151 ◽  
pp. 1322-1331 ◽  
Author(s):  
Mayumi Egusa ◽  
Sumire Matsukawa ◽  
Chihiro Miura ◽  
Shiori Nakatani ◽  
Junpei Yamada ◽  
...  
Keyword(s):  
Nitrogen Uptake ◽  
Nitrogen Uptake Efficiency ◽  
Uptake Efficiency ◽  
Chitin Nanofiber

Kinetic parameters related to nitrogen uptake efficiency of pear trees (Pyrus communis)

2020 ◽  
Vol 272 ◽  
pp. 109530
Author(s):  
Paula Beatriz Sete ◽  
Betania Vahl de Paula ◽  
Matheus Severo de Souza Kulmann ◽  
Andrea de Rossi ◽  
Danilo Eduardo Rozane ◽  
...  
Keyword(s):  
Kinetic Parameters ◽  
Nitrogen Uptake ◽  
Pyrus Communis ◽  
Nitrogen Uptake Efficiency ◽  
Uptake Efficiency ◽  
Pear Trees

Optimising Fertilisation Strategy for Nitrogen Uptake Efficiency

2020 ◽  
Author(s):  
Daniel McKay Fletcher ◽  
Siul Ruiz ◽  
Simon Duncan ◽  
Dave Chadwick ◽  
David Jone ◽  
...  
Keyword(s):  
Nitrogen Uptake ◽  
Nitrogen Use Efficiency ◽  
Numerical Experiments ◽  
Water Movement ◽  
Nitrogen Transport ◽  
Nitrogen Species ◽  
Nitrogen Use ◽  
Nitrogen Uptake Efficiency ◽  
Uptake Efficiency ◽  
Use Efficiency

<p>Sufficient nitrogen fertilisation is essential for obtaining the crop yields required to feed the growing population. Moreover, nitrogen applied to fields is often lost to a number of processes including denitrification, surface run-off and leaching. These processes can damage the local ecology and contaminate water supplies. Additionally, nitrogen lost as ammonia gas and the large energy input required to synthesize ammonia are both large contributors to global greenhouse gas emissions. Choosing fertilisation strategies to optimise the proportion of nitrogen taken up by crops (nitrogen use efficiency) can reduce the production of ammonia and the pollution of water supplies.</p><p>We developed a mathematical model that describes the movement of water and multiple nitrogen species in soil at the field scale over a growing season. The model was then used to assess the nitrogen use efficiency of varying fertilisation strategies. We consider the effects of a number of biological, chemical, and physical processes including: root growth, root uptake, the transformation of nitrogen between different nitrogen species, and the effect of soil water movement on nitrogen transport. The resulting model is comprised of a coupled system of partial and ordinary differential equations that describe the mathematical interplay between nitrogen transport, water movement, and root uptake, which were solved numerically using a finite element approach. Numerical experiments were conducted to determine how nitrogen uptake efficiency was affected by different fertilisation strategies. We examine numerous cases by varying the quantity of fertiliser applied to the soil and the fertiliser application times.</p><p>The numerical experiments suggest that, under uniform rainfall rates, the optimal fertilisation times (within the bounds of typical times found in agriculture) can result in 25% more nitrogen uptake than the worst strategies. However, there were large time periods, 28 days for the first application and 10 days for the second, which resulted in close-to-optimal nitrogen use efficiency. The results of this study, in addition to crop health and past and predicted rainfall, could be taken into consideration by farmers while choosing fertilisation times to optimise nitrogen uptake efficiency.</p>

Nitrogen Uptake Efficiency and Growth of Bell Pepper in Relation to Time of Exposure to Fertilizer Solution

2009 ◽  
Vol 40 (13-14) ◽  
pp. 2111-2131 ◽  
Author(s):  
J. M. Scholberg ◽  
L. Zotarelli ◽  
R. S. Tubbs ◽  
M. D. Dukes ◽  
R. Muñoz‐Carpena
Keyword(s):  
Nitrogen Uptake ◽  
Bell Pepper ◽  
Nitrogen Uptake Efficiency ◽  
Uptake Efficiency ◽  
Fertilizer Solution

scholarly journals Improving Citrus Nitrogen Uptake Efficiency: Understanding Citrus Nitrogen Requirements

EDIS ◽  
2006 ◽  
Vol 2006 (8) ◽  
Author(s):  
Kelly T. Morgan ◽  
Edward A. Hanlon
Keyword(s):  
Nitrogen Uptake ◽  
Publication Date ◽  
Life Stages ◽  
Citrus Tree ◽  
Surface Water Pollution ◽  
Fertilizer Use ◽  
Nitrogen Uptake Efficiency ◽  
Uptake Efficiency ◽  
Nutrient Uptake Efficiency ◽  
Soil And Water

This publication is one in a series of three looking at improved citrus nutrition by increasing the efficiency of fertilizer use. The objectives of this document are: 1. To better match citrus tree N requirements at selected life stages with fertilization practices based on tree growth; 2. To explain the demands for fertilization by citrus trees recovering from leaf loss caused by storms, insects, or disease; 3. To relate citrus nutrient uptake efficiency (NUE) as a means to improve or maintain productivity while minimizing ground and surface water pollution.  This document is SL-240, one of a series of the Department of Soil and Water Sciences, UF/IFAS Extension. Original publication date April 2006. SL-240/SS459: Improving Citrus Nitrogen Uptake Efficiency: Understanding Citrus Nitrogen Requirements (ufl.edu)

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