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Soil fertility, plant nutrition, and grain yield of upland rice affected by surface application of lime, silicate, and phosphogypsum in a tropical no-till system

Texto completo
Autor(es):
Crusciol, Carlos A. C. [1] ; Artigiani, Angela C. C. A. [1] ; Arf, Orivaldo [2] ; Carmeis Filho, Antonio C. A. [1] ; Soratto, Rogerio P. [1] ; Nascente, Adriano S. [3] ; Alvarez, Rita C. F. [3]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Sao Paulo State Univ UNESP, Coll Agr Sci, Dept Crop Sci, BR-18610307 Botucatu, SP - Brazil
[2] UNESP, Coll Engn, Dept Crop Sci Food Technol & Social Econ, BR-15385000 Ilha Solteira, SP - Brazil
[3] UNESP, Coll Agr Sci, Botucatu, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: CATENA; v. 137, p. 87-99, FEB 2016.
Citações Web of Science: 18
Resumo

The development of technologies that provide rapid acidity amelioration of the soil profile through the surface application of amendments and phosphogypsum, such as no-till (NT) systems, is extremely important to provide adequate chemical conditions in tropical soils with low natural fertility, which limits the grain yield of upland rice (Oryza sativa L.). Thus, this study aimed to evaluate the effects of surface applications of lime, silicate, and phosphogypsum, applied individually or in mixtures, on the chemical properties of the soil profile in an NT system and to determine their effects on the nutrition, yield components; and grain yield of upland rice. The experiment was designed as a completely randomized block with eight treatments replicated four times. The combination of phosphogypsum with lime and/or silicate improved the surface and subsurface soil chemical properties 12 months following application. The mixtures increased the concentrations of K, Ca, Mg, N-NO3-, and S-SO42- in the subsurface layers. The sulphur concentration in the flag leaves of upland rice was higher with phosphogypsum application. The number of panicles per m(2) and grain yield of upland rice were positively influenced by the surface application of soil acidity amendments and phosphogypsum mixtures. (C) 2015 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 03/09914-3 - Sistemas de produção agrícola em semeadura direta
Beneficiário:Ciro Antonio Rosolem
Linha de fomento: Auxílio à Pesquisa - Programa PRONEX - Temático