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标题：Phosphorus use efficiency of upland rice cultivars on Cerrado soil Eficiência no uso de fósforo de cultivares de arroz em solos de Cerrado
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作者：Eduardo Lopes Cancellier ; Diogo Ribeiro Brandão ; Joedna Silva 等
期刊名称：AMBIÊNCIA
印刷版ISSN：2175-9405
出版年度：2012
卷号：8
期号：2
页码：307-318
DOI：10.5777/ambiencia.2012.02.06
出版社：Universidade Estadual do Centro-Oeste do Paraná, UNICENTRO
摘要：Rice ( Oryza sativa L.) is one of the most economically important cereal in developing countries and the phosphorus is the most deficient nutrient in the majority of Brazilian soils because their low natural level and high adsorption capacity, therefore it is a crop limiting factor.Rice cultivars have differentiated nutritional requests and tolerances about stress of essential nutrients.This work aimed to evaluate the efficiency about use and response to phosphorus application in upland rice cultivars (BRS-Primavera, BRS-Caiapó, BRSMG-Curinga, BRSMG-Conai, BRS-Sertaneja, BRS-Bonança and Epagri-109) in Cerrado soil.To simulate environments with low and high phosphorus levels were utilized levels of 20 and 120 kg ha-1 of P2O5 respectively.The experimental data were submitted to individual and joint analysis of variance applying the F test.Phosphorus influenced each cultivar differently and were not identified efficient cultivars about use and responsive to its application.The cultivars Epagri-109, BRS-Sertaneja and BRSMG-Conai are indicated to farming systems with high level of phosphorus.The cultivars BRS-Bonança, BRSMG-Curinga, BRS-Primavera and BRS-Caiapó are indicated to farming systems with low level of phosphorus.
关键词：Oryza sativa L.;abiotic stress;mineral stress.