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Agronomy 2018, 8(12), 283; https://doi.org/10.3390/agronomy8120283

Phosphate Sources and Their Placement Affecting Soil Phosphorus Pools in Sugarcane

1
Federal University of Alagoas, Av, Manoel Severino Barbosa Bom Sucesso, Arapiraca, AL 57309-005, Brazil
2
Center for Nuclear Energy in Agriculture (CENA), University of Sao Paulo (USP), Av. Centenário, 303-São Dimas, Piracicaba, SP 13400-970, Brazil
3
Brazilian Bioethanol Science and Technology Laboratory (CTBE), Giuseppe Máximo Scalfaro, 10.000-Guará, Campinas, SP 13083-100, Brazil
4
Agency Paulista for Agribusiness Technology (APTA), Rodovia SP 127, km 30. Bairro: Vila Fátima, Piracicaba, SP 13400-970, Brazil
5
“Luiz de Queiroz” College of Agriculture, University of São Paulo, 11 Pádua Dias Avenue, Piracicaba, SP 13418-900, Brazil
*
Author to whom correspondence should be addressed.
Received: 11 October 2018 / Revised: 21 November 2018 / Accepted: 23 November 2018 / Published: 27 November 2018
(This article belongs to the Special Issue Soil Phosphorus Dynamics: Agronomic and Environmental Impacts)
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Abstract

Phosphate fertilizer placement at sugarcane (Saccharum spp.) establishment can strongly influence the distribution of soil P pools over crop cycles, and has a great influence in the availability of this nutrient to plant uptake. Our main objective was to evaluate sugarcane yield as well as changes in the distribution of soil P pools, under phosphate fertilizer sources and their management, over two years of sugarcane cultivation. The experiment was established in August 2013 with two phosphate sources (TSP (triple superphosphate) and RP (Bayovar rock phosphate)) and three application methods: as broadcast, at planting furrow and combining half broadcast/half plant furrow, all at the rate of 180 kg ha−1 soluble P2O5 being applied at crop establishment. Sugarcane yield and P uptake was evaluated, and soil was sampled after harvest in August 2015 to analyze P fractions. Substantial amounts of P derived from fertilizers were accumulated as inorganic and/or organic moderately labile P. Broadcast application of TSP was not able to enhance total P in 0–40 cm layer compared to control treatment. In general, TSP was more effective to supply P for sugarcane and keep more of this nutrient in all labile fractions in the soil. However, the potential residual effect of RP (Ca-P) is expected in the following years, slowly solubilizing over the time. View Full-Text
Keywords: triple superphosphate; rock phosphate; phosphorus fractionation; broadcast application; banded application; Saccharum spp. triple superphosphate; rock phosphate; phosphorus fractionation; broadcast application; banded application; Saccharum spp.
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Rosendo dos Santos, V.; Soltangheisi, A.; Junqueira Franco, H.C.; Kolln, O.; Vitti, A.C.; Santos Dias, C.T.; Pavinato, P.S. Phosphate Sources and Their Placement Affecting Soil Phosphorus Pools in Sugarcane. Agronomy 2018, 8, 283.

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