Mapeamento de atributos e planejamento amostral para latossolos utilizando suscetibilidade magnética, cor e relação solo-paisagem
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2013-08-22
Autores
Siqueira, Diego Silva [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
O atual contexto nacional da agricultura e da ciência do solo demonstra a importância sobre desenvolvimento de protocolos para delineamento de unidades de mapeamento detalhado do solo e planejamento amostral estratificado. O presente trabalho tem como objetivo utilizar a suscetibilidade magnética (SM), cor do solo e relação solo-paisagem no mapeamento de atributos e planejamento amostral para Latossolos. Foram coletadas 86 amostras em intervalos regulares de 30 m em uma transeção. Nas laterais da transeção, foram coletadas 150 amostras em intervalos de 159 metros (densidade de um ponto a cada 2,5 ha) em 380 ha. Os atributos granulométricos, químicos, SM e cor do solo foram analisados juntamente com resultados de NDVI (Índice de Vegetação por Diferença Normalizada) para os anos de 2009, 2010 e 2011, além de dados da planta coletados em campo. Os resultados da análise “Split Moving Windows” para SM correlacionaram-se com teor de argila (r=0,7; p<0,01), matiz (r=0,4; p<0,05) e NDVI 2010 e 2011 (r=-0,3; p<0,01). Os resultados mostraram que as áreas de manejo específico definidas podem auxiliar no delineamento de unidades de mapeamento detalhado com base na relação solo- -paisagem e variabilidade espacial da SM. Para o estudo do planejamento amostral, em parte da área (150 ha), foram coletadas 60 amostras na densidade de um ponto a cada 2,5 ha com amostragem simples e composta ( 3 subamostras). Diferentes densidades amostrais (um ponto a cada 3; 4; 5; 6; 7; 8 e 9 ha) foram obtidas na área de 380 ha, retirando-se pontos aleatoriamente. Os mapas de krigagem da SM, teor de argila e saturação por bases elaborados com amostragem simples e compostas tiveram índice de concordância (d) próximo de 1. A correlação dos mapas de krigagem nas densidades amostrais de um ponto a cada 2 a 7 ha foi de 0,9. Para as densidade de um ponto a cada 8 e 9 ha, foram encontradas correlações...
The current national context of agriculture and soil science demonstrates the importance of developing protocols for delineation of units of detailed mapping soil and stratified sampling. This paper aims to use the magnetic susceptibility (MS), soil color and soil-landscape relationship in mapping attributes and sample design for Oxisols. 86 samples were collected at regular intervals of 30 m on a transect. On the sides of the transect 150 samples were collected at intervals of 159 meters (density of one point every 2.5 ha) in 380 ha. The texture attributes, chemical, MS and color were considered together with the results of NDVI (Normalized Difference Vegetation) for the years 2009, 2010 and 2011, and plant data collected in the field. The results of analysis Split Moving Windows correlates to SM-RAM with clay content (r = 0.7, p <0.01), hue (r = 0.4, p <0.05) and NDVI 2010 and 2011 (r = -0.3, p <0.01). The results showed that the specific management of areas can assist in the design of detailed mapping units based on soil-landscape relationship and spatial variability of MS. For the sample planning study, in part of the area (150 ha), 60 samples were collected at a density of one point every 2.5 ha with simple sampling and composite (3 subsample). Different sample densities (one point every 3; 4; 5; 6; 7; 8 and 9 h) were obtained in the area of 380 ha removing dots at random. The kriging maps of MS, clay content and base saturation made with simple sampling were composed at an index of agreement (d) close to 1. The correlation maps of kriging sampling densities of one point every 2 to 7 ha was 0.9. For the density of a point every 8 and 9 were found correlations ranging from 0.4 to 0.7. There was agreement of kriging map of clay content in the density of one point every 2.5 ha with the map of SM in the density of each point to 7 ha (d = 0.9). The SM can be used to improve estimates of ...
The current national context of agriculture and soil science demonstrates the importance of developing protocols for delineation of units of detailed mapping soil and stratified sampling. This paper aims to use the magnetic susceptibility (MS), soil color and soil-landscape relationship in mapping attributes and sample design for Oxisols. 86 samples were collected at regular intervals of 30 m on a transect. On the sides of the transect 150 samples were collected at intervals of 159 meters (density of one point every 2.5 ha) in 380 ha. The texture attributes, chemical, MS and color were considered together with the results of NDVI (Normalized Difference Vegetation) for the years 2009, 2010 and 2011, and plant data collected in the field. The results of analysis Split Moving Windows correlates to SM-RAM with clay content (r = 0.7, p <0.01), hue (r = 0.4, p <0.05) and NDVI 2010 and 2011 (r = -0.3, p <0.01). The results showed that the specific management of areas can assist in the design of detailed mapping units based on soil-landscape relationship and spatial variability of MS. For the sample planning study, in part of the area (150 ha), 60 samples were collected at a density of one point every 2.5 ha with simple sampling and composite (3 subsample). Different sample densities (one point every 3; 4; 5; 6; 7; 8 and 9 h) were obtained in the area of 380 ha removing dots at random. The kriging maps of MS, clay content and base saturation made with simple sampling were composed at an index of agreement (d) close to 1. The correlation maps of kriging sampling densities of one point every 2 to 7 ha was 0.9. For the density of a point every 8 and 9 were found correlations ranging from 0.4 to 0.7. There was agreement of kriging map of clay content in the density of one point every 2.5 ha with the map of SM in the density of each point to 7 ha (d = 0.9). The SM can be used to improve estimates of ...
Descrição
Palavras-chave
Levantamentos do solo, Mapeamento do solo, Geofisica, Geologia - Métodos estatísticos, Latossolo, Soil surveys
Como citar
SIQUEIRA, Diego Silva. Mapeamento de atributos e planejamento amostral para latossolos utilizando suscetibilidade magnética, cor e relação solo-paisagem. 2013. xx, 109 p. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, 2013.