Nutrient-Use Efficiency: A Litterfall Index, a Model, and a Test Along a Nutrient-Availability Gradient in North Carolina Peatlands

1995 ◽  
Vol 145 (1) ◽  
pp. 1-21 ◽  
Author(s):  
Scott D. Bridgham ◽  
John Pastor ◽  
Charles A. McClaugherty ◽  
Curtis J. Richardson
Keyword(s):  
North Carolina ◽  
Nutrient Availability ◽  
Nutrient Use Efficiency ◽  
Nutrient Use ◽  
Use Efficiency

Analysis of nutrient use efficiency (NUE) in Eucalyptus pilularis forests

2014 ◽  
Vol 62 (7) ◽  
pp. 558 ◽  
Author(s):  
John Turner ◽  
Marcia J. Lambert
Keyword(s):  
Organic Matter ◽  
Nutrient Availability ◽  
Nutrient Use Efficiency ◽  
Cost Index ◽  
Organic Matter Production ◽  
Nutrient Use ◽  
Matter Production ◽  
Nutrient Utilisation ◽  
Use Efficiency ◽  
Eucalyptus Pilularis

Alternative indices to use for nutrient use efficiency (NUE) were analysed for nitrogen, phosphorus, potassium, calcium, magnesium and sulfur, using 17 Eucalyptus pilularis forest sites to test the hypothesis that NUE increases with decreasing nutrient availability. Reported indices represent different measures of nutrient use, including (1) efficiency of acquisition from soil, (2) quantities required for organic matter production, (3) organic matter production related to uptake, (4) ability to internally retranslocate nutrients and (5) physiological requirement of nutrients. Some indices are highly correlated but the highest correlations were according to age. Phosphorus, the main growth-limiting nutrient, on average, produced 6.5 and 10.9 t of organic matter per kilogram of phosphorus required and taken up from soil, respectively. Comparable estimates were made for other nutrients. NUEs of mobile nutrients increased with decreases in nutrient availability and this supported the hypotheses when age was taken into account. The NUEs of one nutrient are not independent of other nutrients. The inverse of foliage nutrient concentration is a valuable low-cost index of nutrient utilisation and correlates with net primary production/nutrient requirement, and is related to age. Resorption of nutrients, comparing new and abscised tissue, was of low value, but abscised-tissue nutrient correlations are related to a lower benchmark and are of value. The use of selected NUE indices for species comparison was discussed.

Nutrient use efficiency and utilisation in east coast Australian Eucalyptus forests

2019 ◽  
Vol 67 (8) ◽  
pp. 585
Author(s):  
John Turner
Keyword(s):  
Nutrient Availability ◽  
High Efficiency ◽  
Nutrient Use Efficiency ◽  
Nutrient Concentrations ◽  
P Availability ◽  
Mixed Stands ◽  
Available N ◽  
Nutrient Use ◽  
Use Efficiency ◽  
The Difference

Nutrient use efficiency (NUE) has been used as a method to evaluate the utilisation and processes of cycling of nutrient in forests. In publications, different methods have been used to calculate NUE, but as efficiency they are all expressed as ratios and these cover the basic areas of: (1) absorption from the soil and uptake, (2) efficiency in their requirement or utilisation of nutrients including physiological efficiency and (3) efficiency in the retention and internal re-utilisation of nutrients. Few studies address NUE based on complete nutrient cycling information but use indices based on litterfall or foliage nutrient concentrations. In this study different expressions of NUE were defined and evaluated for N and P using data on nutrient cycles on species in the genus Eucalyptus in regrowth and mature native eastern Australian forests. It has been hypothesised that NUE increases with decreasing nutrient availability however increasing such efficiency has a cost reflected in reduced productivity. The hypothesis was proven for all expressions of NUE correlating NUE against estimates of soil N or P availability but there were differences between coastal and tableland Eucalyptus forests. The level of significance varied for different types of NUE and in these ecosystems P was of greater significance than N. This reflected the importance of P in relation to productivity on many of the weathered soils or the limited value of the soil available N indices. It is suggested that the difference expressions of NUE differ in their significance with species so some will be relatively more efficient in terms of uptake, others in utilisation and others in redistribution. Only in extreme situations of nutrient availability do species have relatively high efficiency for all methods NUE calculation. It is proposed that these differences are of importance in site/species distribution and more importantly in mixed stands where they provide advantages either at different stages of stand development or after significant disturbances such as fire.

scholarly journals Nutrient Use and Yield of Banana as influenced by Fertigation

Agropedology ◽  
2019 ◽  
Vol 27 (2) ◽  
Author(s):  
K.D. Kale ◽  
◽  
D.D. Pawar ◽  
U.S. Surve ◽  
S.S. Jadhav ◽  
...  
Keyword(s):  
Nutrient Availability ◽  
Drip Irrigation ◽  
Nutrient Use Efficiency ◽  
Water Soluble ◽  
Growth Stages ◽  
Surface Irrigation ◽  
Nutrient Use ◽  
Use Efficiency ◽  
Crop Growth Stage ◽  
Drip Fertigation

A field experiment was conducted during 2010-2011 in medium deep clay soils at the Research Farm of Mahatma Phule Krishi Vidyapeeth, Rahuri, Maharashtra to find out the effect of drip fertigation on yield and nutrient use efficiency of banana (cv. Grand naine). The treatments comprised of 100, 80 and 60 % recommended dose (RD) of fertilizer applied through drip in two schedules (Schedule A-equal, Schedule B crop growth stage), drip irrigation with only N through drip, drip with conventional fertilizers through soil and surface irrigation as control. The drip irrigation increased banana yield by 59.6 per cent and saved fertilizer to the tune of 40 per cent .The treatment comprising of 100 % RD of fertigation (schedule B) had maximum banana yield (81.84 t ha-1) over surface irrigation (51.26 t ha-1), however, it was at par with 100 % RD of fertigation in uniform 16 splits and 80 % RD of fertigation. Application of water soluble fertilizers through drip resulted in highest nutrient availability than control. In general, 100 % RD had the highest nutrient availability than 80 % and 40 % RD of fertilizer. The nutrient availability was more in treatment in which fertilizers were applied as per growth stages (schedule B) than equal splits (schedule A). The uptake of nutrients was higher in fertigated treatments than other treatments

Foliar nutrient dynamics, growth, and nutrient use efficiency of Hamamelis virginiana in three forest microsites

1985 ◽  
Vol 63 (8) ◽  
pp. 1476-1481 ◽  
Author(s):  
Ralph E. J. Boerner
Keyword(s):  
Soil Moisture ◽  
Nutrient Availability ◽  
Growth Rates ◽  
Nutrient Dynamics ◽  
Nutrient Use Efficiency ◽  
Phosphorus Uptake ◽  
Nitrogen And Phosphorus ◽  
Valley Bottom ◽  
Nutrient Use ◽  
Use Efficiency

To determine the relative importance of soil moisture and soil nutrient availability in determining levels of nutrient use efficiency, seasonal nutrient dynamics and growth rates were determined for individuals of Hamamelis virginiana L., an understory tree, in three forest microsites. The mixed oak site had the lowest levels of soil nutrients and moisture, the mixed mesophytic site the highest nutrient availability, and the valley bottom the highest moisture levels. Foliar nitrogen and phosphorus levels declined over the season in all trees, while calcium levels increased with time. Relative growth rates did not differ significantly among sites, though growth varied inversely with tree mass. Proportional nitrogen resorption was highest in trees at the fertile mesophytic site. Phosphorus and calcium use efficiency were higher at the infertile mixed oak site than the others, and phosphorus resorption was highest in trees from the mixed oak site. Projected nitrogen uptake needs for the next growing season were least at the mixed mesophytic site, while projected phosphorus uptake needs were least at the mixed oak site. Within the ranges of moisture and soil pH – nutrient availability present, growth and nitrogen dynamics seemed most closely correlated to soil moisture, and phosphorus dynamics to phosphorus availability. This differential dependence among elements on moisture levels is suggested to be the underlying reason for differences in the form of the relationship between proportional resorption and soil availability of N and P for a variety of woody species.

Tomato Production in Florida Using Fertigation Technology

EDIS ◽  
2020 ◽  
Vol 2020 (5) ◽  
Author(s):  
Mary Dixon ◽  
Guodong Liu
Keyword(s):  
Nutrient Use Efficiency ◽  
Health Benefits ◽  
Vegetable Crop ◽  
High Demand ◽  
Tomato Production ◽  
Nutrient Use ◽  
Use Efficiency

Tomato is in high demand because of its taste and health benefits. In Florida, tomato is the number one vegetable crop in terms of both acreage and value. Because of its high value and wide acreage, it is important for tomato production to be efficient in its water and nutrient use, which may be improved through fertigation practices. Therefore, the objective of this new 7-page article is to disseminate research-based methods of tomato production utilizing fertigation to enhance yield and nutrient use efficiency. Written by Mary Dixon and Guodong Liu, and published by the UF/IFAS Horticultural Sciences Department.https://edis.ifas.ufl.edu/hs1392

Connecting Crop Nutrient Use Efficiency to Future Soil Productivity

2018 ◽  
Vol 102 (4) ◽  
pp. 8-10
Author(s):  
Fernando García ◽  
Andrés Grasso ◽  
María González Sanjuan ◽  
Adrián Correndo ◽  
Fernando Salvagiotti
Keyword(s):  
Nutrient Management ◽  
Nutrient Use Efficiency ◽  
Management Strategies ◽  
Crop Productivity ◽  
Soil Productivity ◽  
Nutrient Use ◽  
Grain Crop ◽  
Wide Scale ◽  
Use Efficiency

Trends over the past 25 years indicate that Argentina’s growth in its grain crop productivity has largely been supported by the depletion of the extensive fertility of its Pampean soils. Long-term research provides insight into sustainable nutrient management strategies ready for wide-scale adoption.

Improved nutrient management in cereals using Nutrient Expert and machine learning tools: Productivity, profitability and nutrient use efficiency

2021 ◽  
Vol 192 ◽  
pp. 103181
Author(s):  
Jagadish Timsina ◽  
Sudarshan Dutta ◽  
Krishna Prasad Devkota ◽  
Somsubhra Chakraborty ◽  
Ram Krishna Neupane ◽  
...  
Keyword(s):  
Machine Learning ◽  
Nutrient Management ◽  
Nutrient Use Efficiency ◽  
Learning Tools ◽  
Nutrient Use ◽  
Use Efficiency
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