Corn Yield and Grain Nutrient Uptake from 50 Years of Nitrogen and Phosphorus Fertilization

Pollution abatement through phosphorus and nitrogen retention is a key ecosystem service provided by streams. Human activities have been changing in-stream nutrient concentrations, thereby altering lotic ecosystem functioning, especially in developing countries. We estimated nutrient uptake metrics (ambient uptake length, areal uptake rate, and uptake velocity) for nitrate (NO3–N), ammonium (NH4–N), and soluble reactive phosphorus (SRP) in four tropical Cerrado headwater streams during 2017, through whole-stream nutrient addition experiments. According to multiple regression models, ambient SRP concentration was an important explanatory variable of nutrient uptake. Further, best models included ambient NO3–N and water velocity (for NO3–N uptake metrics), dissolved oxygen (DO) and canopy cover (for NH4–N); and DO, discharge, water velocity, and temperature (for SRP). The best kinetic models describing nutrient uptake were efficiency-loss (R2 from 0.47–0.88) and first-order models (R2 from 0.60–0.85). NO3–N, NH4–N, and SRP uptake in these streams seemed coupled as a result of complex interactions of biotic P limitation, abiotic P cycling processes, and the preferential uptake of NH4–N among N-forms. Global change effects on these tropical streams, such as temperature increase and nutrient enrichment due to urban and agricultural expansion, may have adverse and partially unpredictable impacts on whole-stream nutrient processing.

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Cottonseed, Protein and Oil Yields, and Oil Properties as Affected by Nitrogen and Phosphorus Fertilization and Growth Regulators

Journal of Agronomy and Crop Science ◽

10.1111/j.1439-037x.1988.tb00643.x ◽

1988 ◽

Vol 161 (1) ◽

pp. 50-56 ◽

Cited By ~ 11

Author(s):

Z. M. Sawan ◽

A. A. El-Farra ◽

Sania Abd El-Latif

Keyword(s):

Growth Regulators ◽

Phosphorus Fertilization ◽

Nitrogen And Phosphorus ◽

Cottonseed Protein

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Crescimento inicial da berinjeleira sob adubação nitrogenada e fosfatada e irrigada com água de reúso

Revista Verde de Agroecologia e Desenvolvimento Sustentável ◽

10.18378/rvads.v10i3.3656 ◽

2015 ◽

Vol 10 (3) ◽

pp. 34 ◽

Cited By ~ 1

Author(s):

Aldair de Souza Medeiros ◽

Reginaldo Gomes Nobre ◽

Eliane da Silva Ferreira ◽

Whalamys Lourenço de Araújo ◽

Manoel Moises Ferreira de Queiroz

Keyword(s):

Reclaimed Water ◽

Weather Conditions ◽

Dry Mass ◽

Industrial Sector ◽

Treated Wastewater ◽

Intermittent Flow ◽

Phosphorus Fertilization ◽

Initial Growth ◽

Nitrogen And Phosphorus ◽

Sand Filter

A utilização da água vem gerando alguns conflitos devido o aumento da escassez hídrica em todo o mundo, os setores de maior consumo são a agricultura responde por 70%, o setor industrial 22% e 8% corresponde ao uso doméstico. Objetivou-se com este trabalho avaliar os efeitos causados pelas doses de nitrogênio e fósforo e a irrigação com água de reúso doméstica pós-tratada em filtro de areia com fluxo intermitente durante o crescimento inicial da berinjeleira na região semiárida paraibana. O experimento foi realizado em ambiente protegido, no Centro de Ciências e Tecnologia Agroalimentar (CCTA/UFCG), Campus de Pombal – PB, e cujos tratamentos resultaram na combinação de dois fatores: quatro doses de adubação nitrogenada (N1 - 3,55; N2 - 6,2; N3 - 8,9; N4 - 11,55 g de N/vaso) e quatro doses de adubação fosfatada (P1 - 15,28; P2 - 26,74; P3 - 38,2; P4 - 49,66 g de P/vaso) correspondendo respectivamente a 40; 70; 100; 130% conforme indicação de adubação para a cultura da berinjela quando cultivada em vasos, irrigada com água de reúso pós-tratada em filtro de areia intermitente (AR). O delineamento experimental adotado foi o de blocos inteiramente casualizados, com os tratamentos arranjados em esquema fatorial 4 x 4, com quatro repetições. Conclui-se que a prática da irrigação com água de reúso surge como uma fonte hídrica e nutricional para a cultura da berinjela, nas condições edafoclimáticas do semiárido; Doses de 3,55 g de N e 15,28 g de P por planta quando se utiliza água de reúso na irrigação de plantas de berinjela são suficientes para suprir as necessidades nutricionais da cultura. A massa fresca da folha de plantas de berinjela decresceu linearmente com o incremento das doses de N aplicadas. A produção de massa fresca e seca da parte aérea de plantas de berinjela irrigadas com água de reúso com 40% da adubação com N e P não diferiu das plantas que receberam 100% indicação de N e P.Eggplant early growth under nitrogen and phosphate and irrigated with reuse waterABSTRACT - The use of water has generated some conflicts due to increasing water scarcity around the world, the largest consumer sectors are agriculture accounts for 70 %, the industrial sector 22% and 8% corresponds to the household. The objective of this study was to evaluate the effects caused by nitrogen and phosphorus and irrigation with reclaimed water post- treated domestic sand filter with intermittent flow during the initial growth of eggplant in Paraíba semi-arid region.The experiment was conducted in a greenhouse, in the Science and Technology Center Agrifood (CCTA / UFCG), Campus de Pombal - PB, and the treatments resulted in the combination of two factors: four doses of nitrogen (N1 - 3.55; N2 - 6.2; N3 - 8.9; N4 - 11.55 g N / pot) and four doses of phosphorus fertilization (P1 - 15.28; P2 - 26.74; P3 - 38.2; P4 - 49 66 g P / pot) corresponding respectively to 40; 70; 100; 130% as fertilizer indication for eggplants when grown in pots irrigated with treated wastewater post-intermittent sand filter (AR). The experimental design was a completely randomized design, with treatments arranged in a factorial 4 x 4, with four replications. We conclude it the practice of irrigation with reclaimed water emerges as a water and nutrient source for the eggplant crop, soil and weather conditions in the semiarid; Doses of 3,55 g of N and 15,28 g P per plant when using reclaimed water in irrigation eggplants are sufficient to meet the nutritional needs of the crop. The fresh weight of eggplants sheet decreased linearly with increasing N rates. The production shoot fresh and dry mass of eggplant plants irrigated with reclaimed water to 40% of fertilization with N and P did not differ from plants that received 100 % of N and P indication.

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Combined Nitrogen and Phosphorus Fertilization for Controlling the Toxigenic AlgaPrymnesium parvum

North American Journal of Aquaculture ◽

10.1577/a06-027.1 ◽

2007 ◽

Vol 69 (3) ◽

pp. 214-222 ◽

Cited By ~ 23

Author(s):

Gerald L. Kurten ◽

Aaron Barkoh ◽

Loraine T. Fries ◽

Drew C. Begley

Keyword(s):

Phosphorus Fertilization ◽

Nitrogen And Phosphorus ◽

Combined Nitrogen

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Column experiments show that cycling of both nitrogen and phosphorus is altered by dissolved organic carbon in river sediments

10.5194/egusphere-egu21-14774 ◽

2021 ◽

Author(s):

Marc Stutter ◽

Daniel Graeber ◽

Gabriele Weigelhofer

Keyword(s):

Organic Carbon ◽

Nutrient Uptake ◽

Inorganic Nitrogen ◽

River Sediments ◽

P Uptake ◽

Controlled Study ◽

Column Experiments ◽

Nitrogen And Phosphorus ◽

Organic C ◽

Riparian Trees

Since agriculture and wider development have altered simultaneously runoff, pollution and natural structures in catchments (e.g. wetlands, floodplains, soil drainage, riparian trees) aquatic ecosystems deviate from background concentrations of N and P, but also organic C (OC). Hence mechanistic studies coupling OC, N and P are needed and whilst data coupling OC:N is becoming more available and interpreted this is not yet the case for aquatic OC:P.&#160; Column flow experiments (excluding light) allow preliminary controlled study of microbial biogeochemical processes in benthic sediments exposed to factorial nutrients (here +C, +NP, +CNP using simple dissolved substrates glucose, nitrate, and phosphate).Based on the stoichiometric theory, we tested the hypothesis that bioavailable DOC will stimulate the heterotrophic uptake of soluble reactive P (SRP) and dissolved inorganic nitrogen in stream sediments. Glucose-C additions increased nutrient uptake, but also NP additions enhanced consumption of native and added OC. The effects of C addition were stronger on N than P uptake, presumably because labile C stimulated both assimilation and denitrification, while adsorption (unaffected by the presence or not of OC) formed a part of P uptake. Internal biogeochemical cycling lessened net nutrient uptake due to N and P recycling into dissolved organically-complexed forms (DOP and DON).Simple column experiments point to mechanisms whereby availability of organic carbon can stimulate N and P sequestration in the bed of nutrient-polluted streams. This should promote further studies coupling OC with N and, especially P, towards better knowledge and ability to incorporate coupled macronutrient cycles into nutrient models and, potentially, ecosystem management.

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EFFECT OF NITROGEN AND PHOSPHORUS FERTILIZATION ON WILD OATS AND SPRING WHEAT

Canadian Journal of Plant Science ◽

10.4141/cjps63-010 ◽

1963 ◽

Vol 43 (1) ◽

pp. 64-69 ◽

Cited By ~ 7

Author(s):

J. J. Sexsmith ◽

G. C. Russell

Keyword(s):

Seed Yield ◽

Spring Wheat ◽

Nitrogen Fertilizer ◽

High Rate ◽

Phosphorus Fertilization ◽

Wild Oat ◽

Measurable Effect ◽

Nitrogen And Phosphorus ◽

Wild Oats ◽

Loam Soil

Spring wheat, with fertilizer applied in the drill rows, was grown in wild-oat-infested stubble on a Shallow Lethbride loam soil for 4 years, Phosphorus had no measurable effect on the height, straw weight, seed yield, or number of wild-oat plants. In contrast, nitrogen increased the number of seed-bearing stems, plant height, straw weight, and seed yield, but did not change the wild-oat stand. Wheat yields were increased by nitrogen and further increased by the addition of phosphorus at the rate of 20 pounds of P2O5 per acre in 3 of the 4 years. Measured bushel weight of the wheat increased with nitrogen fertilizer additions and was further increased by phosphorus except at the high rate of both materials. Fertilizer applications, under conditions similar to those encountered in this test, may be useful for increasing wheat production, but only at the expense of producing increased quantities of wild-oat seed.

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Yield and Nutritional Quality of Cabbage as Affected by Nitrogen and Phosphorus Fertilization

Bangladesh Journal of Scientific and Industrial Research ◽

10.3329/bjsir.v41i1.267 ◽

1970 ◽

Vol 41 (1) ◽

pp. 41-46

Author(s):

KMF Haque ◽

AA Jahangir ◽

ME Haque ◽

RK Mondal ◽

MAA Jahan ◽

...

Keyword(s):

Block Design ◽

Growth Yield ◽

Nutrient Content ◽

Phosphorus Fertilization ◽

Fertilizer Treatment ◽

P Fertilization ◽

Nitrogen And Phosphorus ◽

Titrable Acidity ◽

Nitrogen Phosphorus

An experiment was conducted in field condition to study the effect of nitrogen-phosphorus fertilization on growth, yield and nutrient content of cabbage. The experiment was laid out in randomize block design with three replications. The yield and yield components were maximized by N3P2 fertilizer treatment. Nutrient content of cabbage varied with fertilizer treatment. The maximum amount of reducing sugar, ascorbic acid, phosphorus were found at the highest rate of N - P fertilization whereas accumulation of titrable acidity, iron, calcium were maximum at the rate of N2P2 treatment. However pH, ash content were more or less same throughout the experiment. Bangladesh J. Sci. Ind. Res. 41(1-2), 41-46, 2006

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