Volatilization Of Ammonium
Mostrando 1-12 de 12 artigos, teses e dissertações.
-
1. Eficiência da adubação nitrogenada no feijoeiro sob sistema de plantio direto
O manejo da adubação nitrogenada é complexo devido às diversas transformações do nitrogênio (N) que ocorrem no sistema solo-planta-atmosfera, diminuindo a eficiência da adubação, produtividade e rentabilidade das áreas de produção de feijão. Assim sendo, este trabalho teve por objetivo avaliar o efeito de diferentes fontes e doses de nitrogêni
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
-
2. Ammonia losses by volatilization from coastcross pasture fertilized with two nitrogen sources.
Ammonia losses by volatilization from five rates of urea or ammonium nitrate surfacce-applied coastcross pasture, grown on a dark red latosol (Hapludox) in Sao Carlos, SP, Brazil, under tropical altitude climate, werw measured. Volatilized ammonia was absorbes in traps placed on soil surface. The mean losses from urea applied after five sucessive cuttings of
INTERNATIONAL GRASSLAND CONGRESS. Publicado em: 2011
-
3. Ammonia loss through volatilization and foliar emission in pasture fertilized with nitrogen sources / Perdas de amônia por volatilização e emissão foliar em pastagem adubada com fontes de nitrogênio
In search of alternatives to measure ammonia (NH3) foliar emission and minimize N-NH3 losses in pasture three research works were accomplished. The two first works aimed at checking whether or not the foam absorber, which was already used to quantify N-NH3 volatilization, is also efficient to measure foliar emission without interfering in nitrogen loss proce
Publicado em: 2009
-
4. Nitrogen transformations in soil-plant system after herbicide application / Transformações do nitrogênio no sistema solo-planta após aplicação de herbicidas
Herbicide adoption might modify nitrogen dynamics in agroecossystems and, for consequence, nutrient availability for plants and microorganisms. These modifications may occur because of plant physiologic changes and/or due to herbicide effects on activity and composition of soil microbial community, which has important functions on system N modifications. In
Publicado em: 2009
-
5. Perdas de nitrogênio por volatilização e lixiviação provenientes de fertilizantes granulados NK e NS / Nitrogen losses by volatilization and leaching from a granulated fertilizer NK and NS
In order to evaluate the volatilization of N-NH3 and leaching of N from granulated mixtures NK (urea and potassium chloride) and NS (urea and ammonium sulfate) in two soils, two experiments were conducted in a greenhouse with controlled temperature and humidity. The experiment followed a completely randomized design, in factorial 12 x 2 x 2 + control treatme
Publicado em: 2009
-
6. Agronomic efficiency of the sugarcane ratoon fertilization with ammonium chloride / Eficiência agronômica da adubação de soqueira de cana-de-açúcar com cloreto de amônio
The greatest difficulty of incorporation into the soil of nitrogen fertilizer is worrying in the system of "green cane" (sugar cane harvested without burning), and once that urea is the nitrogen source most used, we can incur risks of loss by volatilization of NH3. Accordingly, an experiment was conducted in the field (Distrofic Red Oxisol clayed) to evaluat
Publicado em: 2009
-
7. Uréia com NBPT em cobertura na cultura do milho
The urea is subject to significant losses of nitrogen by immobilization, mainly by leaching and volatilization, an alternative to minimize these losses is the pretreatment with an inhibitor of urease, the NBPT [N-(n-butyl) thiophosphoric triamide]. The objective was to evaluate, in a commercial field, the effect of coverage on application of different levels
Publicado em: 2009
-
8. Perdas nitrogenadas e recuperação aparente de nitrogênio em fontes de adubação de capim elefante / Nitrogen losses and aparent recovery of nitrogen in sources of fertilization of elephant-gass
The efficiency of nitrogen fertilization is one of the key elements to grass production. The knowledge of nitrogen losses within this practice associated with the application of alternative nitrogen sources provide efficient use and flexibility in choosing between nitrogen fertilizers. The objective of this study was to evaluate nitrate leaching, ammonium vo
Publicado em: 2008
-
9. Efficiency of sources nitrogen and sulfur in chemical-bromatologic composition and some characteristics of de corn (Zea mays L.) culture in no-tillage system / Eficiência de fontes de nitrogênio e enxofre na composição químico-bromatológica e algumas características agronômicas da cultura de milho (Zea mays L.) em sistema de plantio direto
O presente trabalho foi desenvolvido no Departamento de Zootecnia da Faculdade de Zootecnia e Engenharia de Alimentos da Universidade de São Paulo FZEA/USP localizada em Pirassununga-SP no período de 16/12/2006 a 10/05/2007 em condições de campo com o cultivo do híbrido do milho super precoce GNZ-2005 em Latossolo Vermelho Amarelo distrófico férrico.
Publicado em: 2008
-
10. Ammonia volatilization of nitrogen fertilizers applied in top-dressing to maize in differents environment / VolatilizaÃÃo de amÃnia de adubos nitrogenados sob diversas condiÃÃes ambientais na cultura do milho
Experiments in laboratory and house of vegetation with two ground, one of arenaceous texture (PVAd) and another argillaceous one had been developed (NVdf), beyond a study the field, having for objective to evaluate the agronomic effectiveness of the nitrogen fertilization, evaluating losses of N for volatilization of different nitrogen seasonings: urea; urea
Publicado em: 2007
-
11. Destino do nitrogênio (15N) do fertilizante em uma cultura de café / The fate of fertilizer nitrogen (15N) in a coffee crop
The coffee is one of the most important agribusiness products of Brazil and, although its management practices are already well defined, several cropping aspects still need a deeper understanding. Among these the nutrition of the coffee plant in respect to nitrogen is one of the main subjects needing more clarification. To contribute to this aspect, several
Publicado em: 2006
-
12. Leaf Urea Metabolism in Potato. Urease Activity Profile and Patterns of Recovery and Distribution of 15N after Foliar Urea Application in Wild-Type and Urease-Antisense Transgenics1
The influence of urease activity on N distribution and losses after foliar urea application was investigated using wild-type and transgenic potato (Solanum tuberosum cv Désirée) plants in which urease activity was down-regulated. A good correlation between urease activity and 15N urea metabolism (NH3 accumulation) was found. The general accumulation of amm
American Society of Plant Physiologists.