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All publications of “Henrique Coutinho Junqueira Franco”

11 results

Phosphate Sources and Filter Cake Amendment Affecting Sugarcane Yield and Soil Phosphorus Fractions

Amin Soltangheisi ORCID logo , Valdevan Rosendo dos Santos ORCID logo , Henrique Coutinho Junqueira Franco ORCID logo , Oriel Kolln ORCID logo , André Cesar Vitti ORCID logo , Carlos Tadeu dos Santos Dias ORCID logo , [...]

22/May/2019

ABSTRACT: The use of mineral phosphate fertilizers associated with organic residues can improve fertilizer use efficiency and consequently decrease their usage costs. Soil application of filter cake (FC) can provide nutrients and enhance physical quality. This study aimed to evaluate the effects of different phosphate fertilizers [rock phosphate (RP) and triple superphosphate (TSP)] applied at different rates (90 and 180 kg ha-1 P2O5) associated with filter cake (10 Mg ha-1 dry matter) on the soil phosphorus (P) fractions after two […]

Harvest managements and cultural practices in sugarcane

Sérgio Gustavo Quassi de Castro, Henrique Coutinho Junqueira Franco, Miguel Ângelo Mutton

01/Feb/2014

The presence of trash from the mechanical harvest of green cane on sugarcane plantations promotes changes in the agricultural management, for example, in the mechanical cultural practices of ratoon cane in-between the rows and nitrogen (N) fertilization. The goal of this study was to evaluate the performance of sugarcane in different harvest systems, associated to the mechanical cultural practices in interrows and N rates. The study was carried out on a sugarcane plantation in Sales Oliveira, São Paulo, Brazil, with […]

Incubation methods for assessing mineralizable nitrogen in soils under sugarcane

Eduardo Mariano, Paulo Cesar Ocheuze Trivelin, José Marcos Leite, Michele Xavier Vieira Megda, Rafael Otto, Henrique Coutinho Junqueira Franco

01/Apr/2013

Considering nitrogen mineralization (N) of soil organic matter is a key aspect for the efficient management of N fertilizers in agricultural systems. Long-term aerobic incubation is the standard technique for calibrating the chemical extraction methods used to estimate the potentially mineralizable N in soil. However, the technique is laborious, expensive and time-consuming. In this context, the aims of this study were to determine the amount of soil mineralizable N in the 0-60 cm layer and to evaluate the use of […]

Ammonia losses estimated by an open collector from urea applied to sugarcane straw

Eduardo Mariano, Paulo Cesar Ocheuze Trivelin, Michele Xavier Vieira, José Marcos Leite, Rafael Otto, Henrique Coutinho Junqueira Franco

01/Apr/2012

The quantification of ammonia (NH3) losses from sugarcane straw fertilized with urea can be performed with collectors that recover the NH3 in acid-treated absorbers. Thus, the use of an open NH3 collector with a polytetrafluoroethylene (PTFE)-wrapped absorber is an interesting option since its cost is low, handling easy and microclimatic conditions irrelevant. The aim of this study was to evaluate the efficiency of an open collector for quantifying NH3-N volatilized from urea applied over the sugarcane straw. The experiment was […]

Ammonium chloride as nitrogen source in sugarcane harvested without burning

Michele Xavier Vieira, Paulo Cesar Ocheuze Trivelin, Henrique Coutinho Junqueira Franco, Rafael Otto, Carlos Eduardo Faroni

01/Aug/2010

The great difficulty of incorporation of N fertilizers into the “green sugarcane” system causes concern and since urea is the most commonly used source, there is the risk of loosing NH3 through volatilization. For this reason, a field experiment was undertaken (in a Hapludox Typic) with the objective of evaluating the agronomic efficiency of ammonium chloride on stubble of the second ratoon (SP89 1115), as well as its residual effect on the subsequent cycle (third ratoon). The experimental design was randomized […]

Nutritional status of sugar cane (planted cane) in 15N experiments

Carlos Eduardo Faroni, Paulo Cesar Ocheuze Trivelin, Henrique Coutinho Junqueira Franco, André Cesar Vitti, Rafael Otto, Heitor Cantarella

01/Dec/2009

Studies with stable isotopes are becoming more common due to the increased safety of operation and quality and reliability of results. However, the use of microplots is required to decrease the costs of such studies. Since microplots are small compared to regular plot areas, the purpose of this study was to investigate whether nutritional data based on microplot samples can adequately represent the whole area, in a comparison of the nutritional status of microplot sugar cane plants at their maximum […]

Utilization of Boron (10B) derived from fertilizer by sugar cane

Henrique Coutinho Junqueira Franco, Paulo Cesar Ocheuze Trivelin, André César Vitti, Rafael Otto, Carlos Eduardo Faroni, João Gabriel Tovajar

01/Dec/2009

The response to B in agricultural systems of sugar cane is still an unexplored issue; B application has however recently been widely publicized and used with a certain degree of frequency. The use of 10B-labeled fertilizers may further contribute to clarify this practice. With the objective of evaluating sugar cane use of B (10B) derived from fertilizer (boric acid), an experiment was conducted under field conditions in the 2005/2006 growing season. The experiment consisted of the installation of microplots (2 […]

Root system distribution of sugar cane as related to nitrogen fertilization, evaluated by two methods: monolith and probes

Rafael Otto, Paulo Cesar Ocheuze Trivelin, Henrique Coutinho Junqueira Franco, Carlos Eduardo Faroni, André Cesar Vitti

01/Jun/2009

Few studies on sugar cane have evaluated the root system of the crop, in spite of its importance. This is mainly due to the difficulty of evaluation and high variability of results. The objective of this study was to develop an evaluation method of the cane root system by means of probes so as to evaluate the mass, distribution and metabolically active roots related to N fertilization at planting. For this purpose, an experiment was conducted in an Arenic Kandiustults […]

Straw mineralization and root growth of sugar cane as related to nitrogen fertilization at planting

André Cesar Vitti, Paulo Cesar Ocheuze Trivelin, Heitor Cantarella, Henrique Coutinho Junqueira Franco, Carlos Eduardo Faroni, Rafael Otto, [...]

01/Dec/2008

The experiment was conducted with the sugar cane variety SP81 3250, in a commercial area of the sugar mill São Martinho (Pradópolis-SP), on a clay-texture Rhodic eutrustox. The experimental had a randomized block design with four replications. Bags containing straw enriched with 15N (1.07 % 15N atoms) equivalent to 9 t ha-1 dry matter were placed on the soil surface between the sugar cane plant rows in all treatments (0, 40, 80 and 120 kg ha-1 of N). After 14 […]

Utilization by sugar cane of nitrogen applied at planting

Henrique Coutinho Junqueira Franco, Paulo Cesar Ocheuze Trivelin, Carlos Eduardo Faroni, André Cesar Vitti, Rafael Otto

01/Dec/2008

The 15N balance of N sources in the soil-plant system is of great value in studies of N transformation in different agroecosystems. In the sugarcane agroecosystem, the cane plant response to N fertilization for Brazilian conditions is not fully understood and the use of N fertilizer labeled with 15N can help clarify this issue. To evaluate the urea-N utilization by sugarcane at plant cane harvest, two experiments were developed with the variety SP81-3250, in commercial sugarcane fields. The experiments were […]

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