Nutritional status and foliar fractions of P in coffee plants according to phosphate fertilization

作者：Pereira Reis Thiago Henrique; Furtini Neto Antonio Eduardo; Gontijo Guimaraes Paulo Tacito; Guerra Antonio Fernando; Caputo de Oliveira Cesar Henrique

来源：Pesquisa Agropecuaria Brasileira, 2013, 48(7): 765-773.

DOI：10.1590/S0100-204X2013000700009

• Coffea arabica
• irrigated coffee
• hydric stress
• inorganic phosphorus
• organic phosphorus
• high density planting

The objective of this work was to evaluate, in the rainy and dry seasons, the nutritional status and foliar fractions of P in coffee plants, according to phosphate fertilization, and to determine their relation with coffee yield. The cultivar Rubi MG-1192 of Arabic coffee was used under central-pivot, with high density (7,143 plants per ha) on Rhodic Hapludox, in the Cerrados' region. From 2002 to 2010, the following annual doses of P were used: 0, 50, 100, 200, and 400 kg ha(-1) P2O5. Foliar samples were taken after harvest, in July (dry season), and before grain filling stage, in December (rainy season). Foliar P contents were evaluated in 2009 and 2010, and the coffee yield, from 2008 to 2011. Coffee yield responded linearly to doses up to 400 kg ha(-1) of P2O5. In high yielding conditions, with high P supply, foliar ranges of P are probably different from the ones reported in literature. The reserve of inorganic phosphorus in coffee leaves increases in plants with improved P supply, which ensures greater metabolic activity of plants during periods of drought stress and enables higher productivity.

• 出版日期2013-7