ACCUMULATION OF PHOSPHORUS FRACTIONS AND CONTAMINATION POTENTIAL IN VINEYARD SOILS IN THE SOUTHERN REGION OF THE STATE OF SANTA CATARINA, BRAZIL

被引:12
作者
Schmitt, Djalma Eugenio [1 ]
Comin, Jucinei Jose [2 ]
Ceretta, Carlos Alberto [3 ]
Gatiboni, Luciano Colpo [4 ]
Tiecher, Tales [5 ,6 ]
Lorensini, Felipe [5 ,6 ]
Heinzen, Janaina [7 ]
Ambrosini, Vitor Gabriel [7 ]
de Moraes, Marcel Pires [7 ]
Brunetto, Gustavo [5 ]
机构
[1] Univ Fed Santa Catarina, Agr Ecosyst Grad Program PGA, Rural Engineer Dept ENR, BR-88034000 Florianopolis, SC, Brazil
[2] Univ Fed Santa Catarina, Rural Engineer Dept ENR, BR-88034000 Florianopolis, SC, Brazil
[3] Univ Fed Santa Maria, Soil Sci Departmen SSD T, BR-97105900 Santa Maria, RS, Brazil
[4] Univ Santa Catarina State UDESC, BR-88520000 Lages, SC, Brazil
[5] Univ Fed Santa Maria, SSD, BR-97105900 Santa Maria, RS, Brazil
[6] CAPES, Brasilia, DF, Brazil
[7] Univ Fed Santa Catarina, BR-88034000 Florianopolis, SC, Brazil
来源
REVISTA BRASILEIRA DE CIENCIA DO SOLO | 2013年 / 37卷 / 05期
关键词
phosphate fertilization; phosphorus chemical fractionation; phosphorus adsorption isotherms; environmental contamination; Vitis sp; NO-TILLAGE; ADSORPTION CHARACTERISTICS; PHOSPHATE; SORPTION; FORMS; SAVANNA;
D O I
10.1590/S0100-06832013000500015
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
In vineyards, if phosphate is applied both before planting and at intervals during growth without consideration of technical criteria, the soil P fractions may be increased and their proportions altered. This study was carried out to evaluate the accumulation of P fractions and the parameters of the adsorption isotherm in a sandy Typic Hapludalf soil in vineyards with a history of successive and excessive phosphate fertilization. In December 2010, two vineyards were selected, one 4 and the other 15 years old, in Urussanga, State of Santa Catarina (Brazil). Three trenches were dug in each area and soil was collected from the 0-5, 5-10 and 10-20 cm depth ranges. The soil samples were dried in a forced-air oven, sieved and subjected to chemical analyses, P chemical fractionation and P adsorption isotherms. Excessive phosphate fertilization, before and during cultivation, particularly in the older vineyard and, consequently, with a longer history of phosphate fertilization, increased the inorganic P concentrations to the depth of 20 cm, especially in labile fractions extracted by anion exchange resin and NaHCO3 in the non-labile fraction, as well as in the non-labile fraction extracted by 1.0 mol L-1 HCl. The application of phosphate fertilizers and the long cultivation period increased the P levels in the organic labile fraction extracted by 0.5 mol L-1 NaHCO3, and especially in the moderately labile fraction extracted by 0.1 and 0.5 mol L-1 NaOH. Phosphate fertilization of older vineyards, i.e., cultivated for 15 years, increased the amounts of P desorbed in water, indicating a risk of contamination of surface waters and groundwater. The phosphate fertilization before planting, without considering the results of soil analysis, and during cultivation, disregarding the results of soil analysis, leaf analysis and expected yield, led to a reduction in the maximum P adsorption capacity in the 0-5 cm layer of vineyard 2, indicating saturation of part of the reactive particle adsorption sites.
引用
收藏
页码:1256 / 1266
页数:11
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