Spatial dependence of soybean cultivation, in a lowcarbon production system, integrated with eucalyptus forest

Dependência espacial da cultura da soja, em sistema de produção de baixa emissão de carbono, integrada com floresta de eucalipto

ABSTRACT

In a climate change scenario, a producer who decides to invest in a Crop-Forest integration system, instead of investing in conventional production, benefits. The objective the present work, which is a low carbon emission agriculture model, aimed to evaluate the effect of shading and the spatial dependence of soybean crop indices in integration with eucalyptus forest. The design adopted was that of randomized blocks with six replications and treatments composed of different horizontal distances about eucalyptus (30, 34, 38, 42 and 46 m), in two distinct areas, one with the presence of eucalyptus forest in the north and west phase and another one without the presence of eucalyptus in the northern part of the soybean cultivation area. Evaluated the photosynthetically active photons at four different times, the plant stand, plant height, and the vegetation index after 30 and 60 days of germination and finally the mass of a thousand grains and productivity. As a result, all attributes showed spatial dependence, except soybean productivity. As final considerations, the spacing of 34 m between the eucalyptus trees promote less shading. The highest average grain production in the area was found in the presence of eucalyptus on the west and north sides of the cultivation area.

Keywords
Canonical Variables; Glycine max (L.) Merrill; Multispectral; Remotely Piloted Aircraft; Vegetation Index