Componentes de produção da soja em sistemas de manejo do solo

Abstract

Soil management systems can lead to different forms of conditions for root development and consequent development of plants. Therefore, the objective of this study was to evaluate the effect of soil management systems: no mobilization, minimum cultivation, cross-scarification plus one harrowing, scarification and one harrowing, two-stage plowing and one harrowing, in the agronomic components of soybean resistance to penetration. The work was developed at the FAECA Experimental Farm of Agricultural Sciences of the Federal University of Grande Dourados - UFGD, in Dourados-MS, in a dystroferric Red Latosol, with a very clayey texture. A randomized block design with six treatments and four replicates was used. The evaluations were: plant stand, plant height, stem diameter, first pod insertion, number of pods, one thousand grain mass and yield and also resistance to penetration. It was observed that even the non-mobilization management system with greater resistance to penetration in relation to the other preparations had no difference in productivity, which did not require any type of soil preparation operation. Because the soil surface was irregular and with large amounts of aggregates, it was observed a difference in the plant stand and consequently, it interfered in the number of pods per plant.