Foliar nutrient dynamics and nutrient use efficiency in Cornus florida

ABSTRACTThe distribution of the nutrients N, P and K in soil and vegetation and their mobility through litterfall and decomposition in mature and successional stands of a subtropical dry forest were studied in Guánica, Puerto Rico. Soils of the Guánica forest have high total amounts of N (9100 kg/ha), P (1820 kg/ha), and K (7460 kg/ha). However, high extractable Ca (>4000 mg/g) and pH (> 7–8) may explain why only 1.3 and 25% of the total P and K, respectively, were extractable. Total ecosystem storage of N, P and K was 10,300, 1900 and 7700 kg/ha, respectively, of which vegetation stored only 10, 2 and 3%, respectively. Litterfall returned 26, 18 and 180% per year of the N, P and K stored in the ground litter compartment. Trees retranslocated about 30 and 65% of the N and P required to satisfy aboveground net primary production and immobilized P in dead roots. Slow leaf decomposition (7.3 yr for 95% decomposition) released K faster than mass, P as fast as mass, and ash and N slower than mass. The use efficiency of P by litterfall was high compared with other tropical forests, while that of N and K was similar to other tropical and temperate forests. Cutting and regrowth of vegetation resulted in differences in the nutrient concentration in litterfall and nutrient use efficiency of successional vegetation.

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Foliar nutrient dynamics and nutrient-use efficiency of oak and pine on a low-fertility soil in Wisconsin

Canadian Journal of Forest Research ◽

10.1139/x91-128 ◽

1991 ◽

Vol 21 (6) ◽

pp. 925-934 ◽

Cited By ~ 13

Author(s):

J. G. Bockheim ◽

J. E. Leide

Keyword(s):

Nutrient Dynamics ◽

Nutrient Use Efficiency ◽

Jack Pine ◽

Low Fertility ◽

Leaf Abscission ◽

Root Turnover ◽

Fine Root Turnover ◽

Nutrient Use ◽

Use Efficiency ◽

The Absolute

Seasonal changes in 10 nutrients were investigated in the foliage and current twigs of jack pine (Pinusbanksiana Lamb.) and northern pin oak (Quercusellipsoidalis E.J. Hill) growing on a sandy, nutrient-poor soil in northwestern Wisconsin. Midsummer (July 26) concentrations of all nutrients except Zn were significantly greater in oak foliage than in current needles of pine. Whereas the absolute amounts of N, P, K, Mg, S, B, and Fe in oak foliage peaked in midsummer, generally in late July, the amounts of Ca, Zn, and Mn continued to increase until leaf abscission. The absolute amounts of all 10 nutrients in current needles of pine increased over the growing season. Absolute amounts of nutrients in 2- and 3-year-old needles generally decreased from midsummer to leaf abscission. The two species differ in mechanisms of nutrient-use efficiency. Northern pin oak has a greater requirement for all macronutrients except Mg than jack pine. Although the absolute amounts are greater, proportionally lower amounts of required nutrients are retained in perennial tissues of northern pin oak than in jack pine. A large portion of the nutrient requirement in oak is met by recycling of nutrients contributed by litterfall, throughfall, and fine-root turnover. Northern pin oak resorbed greater amounts of N and K prior to leaf abscission than jack pine. In contrast, jack pine conserves nutrients by investing low amounts of nutrients per unit of leaf or bolewood production and by returning a low proportion of nutrients in litterfall per unit aboveground tissue produced.

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

Canadian Journal of Botany ◽

10.1139/b85-204 ◽

1985 ◽

Vol 63 (8) ◽

pp. 1476-1481 ◽

Cited By ~ 31

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.

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Clonal Variation in Photosynthesis, Foliar Nutrient Concentrations, and Photosynthetic Nutrient Use Efficiency in a Brazil Nut (Bertholletia excelsa) Plantation

Forest Science ◽

10.5849/forsci.15-068 ◽

2016 ◽

Vol 62 (3) ◽

pp. 323-332 ◽

Cited By ~ 3

Author(s):

Marciel J. Ferreira ◽

José Francisco de Carvalho Gonçalves ◽

João Baptista Silva Ferraz ◽

Ulysses Moreira dos Santos Junior ◽

Heinz Rennenberg

Keyword(s):

Nutrient Use Efficiency ◽

Clonal Variation ◽

Nutrient Concentrations ◽

Brazil Nut ◽

Bertholletia Excelsa ◽

Nutrient Use ◽

Foliar Nutrient ◽

Foliar Nutrient Concentrations ◽

Use Efficiency

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Tomato Production in Florida Using Fertigation Technology

EDIS ◽

10.32473/edis-hs1392-2020 ◽

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

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Connecting Crop Nutrient Use Efficiency to Future Soil Productivity

10.24047/bc10248 ◽

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.

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

Agricultural Systems ◽

10.1016/j.agsy.2021.103181 ◽

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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