期刊
ARCHIVES OF AGRONOMY AND SOIL SCIENCE
卷 60, 期 6, 页码 735-746出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/03650340.2013.836595
关键词
rice; nutrient constraints; grain yield and quality; foot slope; soil fertility
Soil nutrient deficiencies can affect rice yield and grain mineral content wherever they occur, but an understanding of their effect on upland rice production in humid forest zone of West Africa is still limited. Therefore, a nutrient omission trial was conducted on foot slope soil in 2003, 2004 and 2005 in Cote d'Ivoire using rice variety WAB 56-104. The effect on rice grain yield (GY) and nutrient content of complete fertilizer (Fc with nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg) and zinc (Zn)) was compared with Fc from which a specific nutrient was excluded (Fc - N, Fc - P, Fc - K, Fc - Ca, Fc - Mg and Fc - Zn). Before the trial, soil K (0.10cmolkg(-1)) and Mg (0.20cmolkg(-1)) contents were suitable, but available P-Bray I (4.2mgkg(-1)) was found to be deficient. In course of the study, K, Mg and P deficiencies were observed. An antagonistic effect was observed between rice GY and grain concentrations in P, Mg and Ca for treatments Fc - Mg, Fc - P and Fc - K, respectively. Therefore, the use of P, K and Mg fertilizers is recommended for successive cropping seasons in order to rich stable and high rice yield while decreasing of grain concentrations in P, Mg and Ca can be observed.
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