Data/hora: 10/06/2024 01:25:54

Provedor de dados: | 90
País: | Brazil
Título: | Attributes of irrigated rice as affected by soil sodicity and potassic fertilizer application
Autores: | Carmona,Felipe de Campos; Anghinoni,Ibanor; Holzschuh,Marquel Jonas; Martins,Amanda Posselt.
Data: | 2011-06-01
Ano: | 2011
Palavras-chave: | Sodium; Potassium; Oryza sativa L.; Density; Spikelet sterility; Grain yield.
Resumo: | Soils of the coastal plains of Rio Grande do Sul, Brazil, are affected by salinization, which can hamper the establishment and development of crops in general, including rice. The application of high doses of KCl may aggravate the crop damage, due to the high saline content of this fertilizer. This study aimed to evaluate the effect of K fertilizer management on some properties of rice plant, grown in soils with different sodicity levels, and determine which attribute is best related to yield. The field study was conducted in four Albaqualfs with exchangeable Na percentages of 5.6, 9.0, 21 and 32 %. The management of KCl fertilizer consisted of the application of 90 kg ha-1 K2O broadcast, 90 kg ha-1 K2O in the row and 45 kg ha-1 K2O in the row + 45 kg ha-1 K2O at panicle initiation (PI). Plant density, dry matter evolution, height, SPAD (Soil Plant Analysis Development value indicating relative chlorophyll contents) index, tiller mass, 1,000-grain weight, panicle length and grain yield were evaluated. The plant density was damaged by application of K fertilizer in the row, especially at full dose (90 kg ha-1), at three sodicity levels, resulting in loss in biomass accumulation in later stages, affecting the crop yield, even at the lowest level of soil sodicity (5.6 %). All properties were correlated with yield; the highest positive correlation was found with plant density and shoot dry matter at full flowering, and a negative correlation with panicle length.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000300023
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832011000300023
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.35 n.3 2011
Fonte: | info:eu-repo/semantics/openAccess