Isotopic of nitrogen and chemical analysis of deferred grazing marandu palisadegrass fertilized with urea and poultry litter

Abstract

This study aimed to evaluate and quantify the methodology of stable isotopes, 15 N values for the organic fertilizer (chicken manure) and inorganic (urea). In addition to evaluating the incorporation rate, chemical half-life and analysis thereof, for possible traceability through the pasture fertilized with different sources of N. The technique of employment with use of tracer stable isotope 15 N possible to estimate the changes in the N soil, even in the face of the various changes that take place concurrently. The methodology determines the path of both N isotopes ( 15 N and 14 N), providing information about the system and estimating N transformation rates The experimental work was conducted at the Faculty of Veterinary Medicine and Animal Science, UNESP Botucatu. An area of 576m 2 was used for the parcels, which were divided between the 3 treatments with 4 repetitions each: T1 -control treatment without fertilization; T2 -fertilization with urea and T3 -organic fertilizer with poultry litter. The grass was cut every 15 days, three months after fertilization, for a total of four periods of grazing exclusion. Experimental samples were analyzed for the isotopic nitrogen and crude protein, neutral detergent fiber, acid detergent fiber, cellulose, hemicellulose and lignin composition. Degradation of poultry litter, the sand bag method was analyzed by linear regression. δ 15 N forage, fodder percentage of nitrogen, percentage of total nitrogen sheet, δ 15 N on the sheet, and δ 15 N at the helm were different between treatments. To this end collection, difference was observed for% Total Nitrogen, % Total N in sheet, % Total N in the trunk and% Total N at the helm. The crude protein analysis revealed significant differences between treatments, while the crude protein and lignin differ according to time after fertilization. The technique of N stable isotope effectively distinguish the composition of organic and inorganic fertilizers in deferred grazing pastures of Urochloa brizantha cv. Marandu. Forage quality was not influenced by the source of N. , utilizada para as parcelas foi dividida em 3 tratamentos com 4 repetições cada, segundo os tratamentos: T1 -tratamento testemunho sem adubação; T2 -adubação com ureia e T3 -adubação orgânica com cama de frango. Após três meses, o capim foi cortado a cada 15 dias, totalizando quatro períodos de vedação. As amostras colhidas no experimento foram analisadas em relação ao sinal isotópico do nitrogênio e composição química de proteína bruta, fibra em detergente neutro, fibra em detergente ácido, celulose, hemicelulose e lignina. A degradação do adubo cama de frango, pelo método do litter bag, foi analisada por meio de regressão. Existe diferença para δ 15 N na forragem em relação aos tratamentos utilizados, assim como para porcentagem de Nitrogênio na forragem, porcentagem de Nitrogênio Total na Folha, δ 15 N na folha, δ 15 N no perfilho. Para o efeito coleta houve diferença para %Nitrogênio Total, %N total na folha, %N total no colmo e % N total no perfilho. Para an...

Replacement of liming and NPK fertilization with turkey litter in degraded areas grown with Urochloa decumbens

“…Other studies indicated that the use of litter in agriculture added chemical elements that could improve chemical, physical, and biological attributes of the soil (ARRUDA et al, 2014;SILVEIRA JÚNIOR et al, 2015;LIMA et al, 2016;OLIVEIRA et al, 2016). Arruda et al (2014) evaluated the effect of poultry litter in substitution for chemical fertilizers on elephant grass pasture in Botucatu, São Paulo, and observed that regardless of the application form -single or split dose -the litter used as nitrogen fertilizer replaced urea in the cover fertilization of elephant grass.…”

Agronomic traits, chemical composition and silage quality of elephant grass fertilized with poultry litter

“…Thus, knowledge of this value is important in the calculation of nutrient replacement required by crops. In the present study, the dry matter content was 43.32%, below the value of 87% obtained by Lima et al (2016).…”

“…Poultry litter has important concentrations of nitrogen, phosphorus, potassium, and micro minerals such as copper and zinc (Oviedo-Rondon, 2008;Lima et al, 2016). According to Costa et al (2015), there is a necessity for studies on the use of poultry litter as organic fertilizer in the productivity of cultures.…”