Dry matter accumulation, chlorophyll and sulfur leaf in corn fertilized with different sulfur sources

I. V. Fiorini, R. G. Pinho, H. D. Pereira, L. P. M. Pires, Fabrício Vilela Andrade Fiorini, E. L. Resende
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引用次数: 5

Abstract

In Brazil, with the constant use of concentrated NPK fertilizers, sulfur became a limiting nutrient for corn plant growth and development. This research aimed to evaluate the efficiency of elemental sulfur coating the granule of fertilizer, compared with the sulfur of ammonium sulfate associated to soluble fertilizers based on NPK. The hybrid-corn DKB390 was evaluated under a completely randomized design in a factorial scheme 3x6 (three fertilizers × six phenological stages) with three replications. A soil under corn monoculture was used. Three types of formulated fertilizers (NPK) associated with sulfur (ammonium sulfate or elemental sulfur) and the control without S was used. The accumulation of the shoots and root dry matter, chlorophyll and sulfur in leafs were evaluated. The data were collected at stages: 6 leafs, 10 leafs, 14 leafs, tasselling, flowering and physiological maturity. The used fertilizers provided differences in the shoot dry matter and in the sulfur accumulation in leafs. The sulfur accumulation in corn leafs was similar among the elemental sulfur and the ammonium sulfate treatments. Elemental sulfur provided superior results in comparison to the fertilizer without sulfur and was similar to the fertilizer with ammonium sulfate.
不同硫源对玉米干物质积累、叶绿素和硫叶的影响
在巴西,由于持续使用浓缩氮磷钾肥料,硫成为玉米植株生长发育的限制性养分。本研究旨在评价单质硫包覆在颗粒肥料上的效率,并与氮磷钾型可溶性肥料中硫酸铵包覆硫进行比较。采用3 × 6(3种肥料× 6个物候期)3个重复的全随机设计对杂交玉米DKB390进行评价。采用玉米单一栽培的土壤。采用3种与硫(硫酸铵或单质硫)相关的配方肥料(NPK)和不含硫的对照。测定了叶片中茎、根干物质积累量、叶绿素和硫含量。分别在6叶、10叶、14叶、抽雄、开花期和生理成熟期采集数据。不同肥料在茎部干物质和叶片硫积累方面存在差异。单质硫处理和硫酸铵处理的玉米叶片硫积累量基本相同。单质硫的效果优于不含硫的肥料,与含硫酸铵的肥料效果相似。
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