文献类型： 外文期刊

第一作者： Xavier, Maxuel Fellipe Nunes

作者： Xavier, Maxuel Fellipe Nunes;Flores, Rilner Alves;Casaroli, Derblai;Capuchinho, Frank Freire;Dapper, Felipe Puff;do Carmo, Riandra Tenorio;Santos, Glenio Guimaraes;Damin, Virginia;Lima, Mateus de Leles;Campos, Cid Naudi Silva;Verma, Krishan Kumar

作者机构：

关键词： Foliar spray; leaf fertilization; nitrate and ammonium in the soil; photosynthetic efficiency; Saccharum spp; sustainable production

期刊名称：JOURNAL OF PLANT NUTRITION （ 影响因子：2.1； 五年影响因子：2.4 ）

ISSN： 0190-4167

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Sugarcane is the primary renewable energy source in Brazil, necessitating efficient and sustainable production practices. This study assessed the impact of nitrogen sources and their combination of silicon as foliar application on carbon dioxide (CO2) emissions and physiological characteristics of sugarcane cultivated in tropical environment. The experiment was conducted using the second sugarcane ratoon (variety CTC-04), as 2x5 factorial design, with two sources of N-fertilizer (urea and calcium ammonium nitrate - CAN, association with DMPSA - 3,4-dimetilprirazol succinico, nitrification inhibitor) and different silicon concentrations such as 0, 150, 300, 450, and 600 g ha(-1). Photosynthetic leaf gas exchange, water use efficiency, pigments, CO2 emissions (ECO2), ammonium and nitrate levels in the soil were observed. The results were subjected to analysis of variance using the F test along with polynomial regression and mean comparison tests. Using urea as a source of nitrogen, there was an increase in internal CO2 concentration of the plants by 19% in relation to treatment with calcium ammonium nitrate association with DMPSA (CAN + DMPSA). Nevertheless, urea increased ECO2 emissions into the atmosphere by up to 15.3% higher compared to CAN + DMPSA application. Foliar application of Si (300 g ha(-1)) reduced plant transpiration rate (21%), irrespective the source of N-fertilizer utilized. Thus, it is concluded that the use of calcium ammonium nitrate associated with a nitrification inhibitor is an interesting strategy for reducing CO2 emissions, as well as Si is capable of reducing the plant's transpiration rates, making it efficient in the use of water.

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