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Bioscience Journal
Article . 2011
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Análise espacial da distribuição longitudinal de sementes de milho em uma semeadora-adubadora de precisão

Authors: Marques Santos, Alessandro Jose; Gamero, Carlos Antonio; de Oliveira, Rone Batista; Villen, Andreia Correa;

Análise espacial da distribuição longitudinal de sementes de milho em uma semeadora-adubadora de precisão

Abstract

In the operation of sowing with planter numerous factors interfere with the establishment of the plant stand, among them, the longitudinal distribution of seeds depending on the displacement speed can significantly affect crop productivity.The present study aimed the evaluation of longitudinal distribution of maize seeds in two different speeds of dislocation of a precision grain drill, through classical and geostatistics. A regular grid sample, totalizing 100 points in each area, was built with 10-meter distance among the points. Each sample point comprised 3.6m(2) (1.8 x 2.0) where the percentage of acceptable, double and fail spacing among the plants was measured after sowing at 4.58 and 5.94 km h(-1) speed of dislocation. Classical and geostatistics were used for data analyses. The percentage of acceptable and failed spacing has shown significant difference between 4.58 and 5.94 km h(-1) speed. The results has shown absence of spatial dependence regarding the percentage of the studied spacing (acceptable, fail and double) at both speeds, showing that studies and statistical inferences can occur based on parameters of classical statistics for distances higher than the shortest one used in the sampling.

O objetivo do presente trabalho foi avaliar a distribuição longitudinal de sementes de milho em duas velocidades de deslocamento de uma semeadora-adubadora de precisão, através da estatística clássica e geoestatística. Para isso, foi construída uma malha de amostragem em grid regular com distância entre os pontos de 10 m, totalizando 100 pontos amostrais em cada área. Cada ponto amostral constituiu uma área de 3,6 m2 (1,8 x 2,0 m), onde se mediu a percentagem de espaçamentos aceitáveis, duplos e falhos entre plantas, após semeadura nas velocidades de deslocamento de 4,58 e 5,94 km h-1. Os dados foram analisados pela estatística clássica e geoestatística. A percentagem de espaçamentos aceitáveis e falhos apresentou diferença significativa entre as velocidades de 4,58 e 5,94 km h-1. Os resultados indicaram ausência de dependência espacial para as percentagens de espaçamentos estudados (aceitáveis, falhos e duplos) nas duas velocidades, indicando que estudos e inferências estatísticas podem ser realizados com base em parâmetros da estatística clássica para distância maior que a menor utilizada na amostragem.

Country
Brazil
Keywords

Seed distribution, Agricultural Sciences, distribuição de sementes, S, QH301-705.5, Agriculture, Pure nugget effect, Spatial variability, Classical statistics, estatística clássica, variabilidade espacial, Biology (General), Efeito pepita puro

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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