Author(s):
Crusciol, Carlos A.C. [UNESP] ; Artigiani, Angela C.C.A. [UNESP] ; Arf, Orivaldo [UNESP] ; Carmeis Filho, Antonio C.A. [UNESP] ; Soratto, Rogério P. [UNESP] ; Nascente, Adriano S. [UNESP] ; Alvarez, Rita C.F. [UNESP]
Date: 2018
Persistent ID: http://hdl.handle.net/11449/177509
Origin: Oasisbr
Subject(s): Cation mobility; Combined alkaline substances; Oryza sativa; Plant nutrition; Soil amendment; Cation mobility; Cation mobility; Combined alkaline substances; Combined alkaline substances; Oryza sativa; Oryza sativa; Plant nutrition; Plant nutrition; Soil amendment; Soil amendment
Description
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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 12months following application. The mixtures increased the concentrations of K, Ca, Mg, N-NO3 -, and S-SO4 2- in the subsurface layers. The sulphur concentration in the flag leaves of upland rice was higher with phosphogypsum application. The number of panicles per m2 and grain yield of upland rice were positively influenced by the surface application of soil acidity amendments and phosphogypsum mixtures.
São Paulo State University (UNESP), College of Agricultural Sciences, Department of Crop Science, P.O. Box 237
UNESP, College of Engineering, Department of Crop Science, Food Technology, and Social Economy, P.O. Box 31
UNESP, College of Agricultural Sciences
Brazilian Agricultural Research Corporation (EMBRAPA), Rice and Bean Research Center, P.O. Box 179
Federal University of Mato Grosso do Sul (UFMS), P.O. Box 112
São Paulo State University (UNESP), College of Agricultural Sciences, Department of Crop Science, P.O. Box 237
UNESP, College of Engineering, Department of Crop Science, Food Technology, and Social Economy, P.O. Box 31
UNESP, College of Agricultural Sciences
