Desempenho produtivo da soja em função da população e distribuição de plantas na fileira

Abstract

The objective of this work was to evaluate the productive performance of soybean cultivated in lowlands, submitted to different spacing between plants in the sowing row. The work was developed over two agricultural harvests (2017/18 and 2018/19 harvests), the experimental design was of blocks to the case, composed of eight treatments and four repetitions, being: T1 - witness treatment) Spacing of 8 cm between plants, 1 plant per hole-¹; T2) Spacing of 6-10-6 cm between plants, 1 plant per hole-¹; T3) Spacing of 4-12-4 cm between plants, 1 plant per hole-¹; T4) Spacing of 16 cm between plants, 2 plants per hole-¹; T5) Spacing of 6-6-10 cm between plants, 1 plant per hole-¹; T6) Spacing of 4-4-12 cm between plants, 1 plant per hole-¹; T7) 16 cm spacing between plants, 3 plants per hole-¹; T8) Spacing of 45 cm between plants, 4 plants per hole-¹, with 32 plots with dimensions of 3.0 x 2.5 (7.5 m²). The plants were arvested in a useful area of 3.0 m². In the sample collected by plot, 20 plants were selected at random for the procedure of analysis of individual variables in each plant, being: plant height, number of secondary stems, number of vegetables from the main and secondary stems, number of grains from the main stem and secondary, weight of grains of the main and secondary stem and weight of one thousand grains of the main and secondary stem. From the total sample collected, the analyzes of soybean grain productivity and weight of a thousand grains were carried out. The soybean productivity does not vary due to the spatial distribution of soybean plants in the row up to 45 cm and variation of up to 47.6% in the plant population per hectare. The plant population per hectare has a greater influence on the productivity components when compared to the distribution of plants in the sowing row.