Nitrogen (15N) use efficiency for fertilization managements of maize and common bean using mixtures of polymer sulfur coated urea and conventional urea

• Grant number: 17/25813-5
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: April 01, 2019
• End date: June 30, 2021
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Paulo Cesar Ocheuze Trivelin
• Grantee: Pedro Lopes Garcia
• Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

Nitrogen (N) is the most required nutrient by maize and common bean, being necessary in low quantities at the beggining and in adequated quantities during the development of both crops. Urea is the main N source but it has a low N Use Efficiency (NUE) that is associated with N losses when this source is applied on the soil surface. A manner to increase NUE would be to use mixtures of polymer sulfur coated urea (URSP) and conventional Urea (U). However to recommend accurately these mixtures in the current cropping systems, it is necessary to know the participation of each source of the mixture (U+URSP) in the uptake by the plants. Therefore, it is necessary to label each fraction of the mixture (U+URSP) with 15N isotope. Thus, the main objective of the present work is to evaluate the N fertilizer use efficiency (NUEF) by maize and winter common bean, applying mixtures of U+URSP (15N-labelled) on certain straw immediately after sowing in no tillage. The specific objectives will be to evaluate in field experiments: a) NUEF by maize and winter common bean; b) the nitrogen (15N) in plants from the fractions of the mixtures (U+URSP) during the maize and commom bean cycle; c) residual nitrogen (15N) in the soil at the end of the crops cycles; d) NUE using the difference method; e) dry mass and macronutrients accumulation of the aerial part of plants during the crops development; f) the maximum rate of dry mass and macronutrients accumulation; g) the mineral N of the soil along the crops cycles; h) C/N ratio and amount of straw produced by the previous crop; i) fertilizer ammonia volatilization; j) grain yield. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

GARCIA, PEDRO LOPES; TRIVELIN, PAULO CESAR OCHEUZE. Methods to quantify the nitrogen derived from the fertilizer in maize applying blends of controlled-release and NBPT-treated urea. JOURNAL OF PLANT NUTRITION, v. N/A, p. 11-pg., 2022-04-29. (17/25813-5, 17/24516-7)

GARCIA, PEDRO LOPES; SERMARINI, RENATA ALCARDE; TRIVELIN, PAULO CESAR OCHEUZE. Nitrogen Fertilization Management with Blends of Controlled-Release and Conventional Urea Affects Common Bean Growth and Yield during Mild Winters in Brazil. AGRONOMY-BASEL, v. 10, n. 12, DEC 2020. (17/25813-5, 17/24516-7)

GARCIA, PEDRO LOPES; SERMARINI, RENATA ALCARDE; ANA FILHO, CARLOS ROBERTO DE SANT; BENDASSOLLI, JOSE ALBERTINO; BOSCHIERO, BEATRIZ NASTARO; TRIVELIN, PAULO CESAR OCHEUZE. N-15-Fertilizer Recovery in Maize as an Additional Strategy for Understanding Nitrogen Fertilization Management with Blends of Controlled-Release and Conventional Urea. AGRONOMY-BASEL, v. 10, n. 12, DEC 2020. (17/25813-5, 17/24516-7)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

GARCIA, Pedro Lopes. Nitrogen (15N) use efficiency for fertilization managements of maize and common bean using mixtures of polymer-sulfur coated urea and conventional urea. 2021. Doctoral Thesis - Universidade de São Paulo (USP). Centro de Energia Nuclear na Agricultura (CENA/STB) Piracicaba.