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Abstract
Most Brazilian soils have low organic matter content, and the current management systems used in agriculture contribute to worsening this situation. The introduction of practices that lead to the increase of soil organic matter becomes more necessary for agrosystems to be sustainable, ensuring high yields because only then the production chain becomes profitable and enables agricultural production. The present work aimed to investigate the effect of intercropping practices among corn crop with different green manures in soybean agronomic parameters. The work consisted of five treatments using Brachiaria ruziziensis (Brachiaria); Raphanus sativus (Forage Turnip); Crotalaria spectabilis cv. Common (Crotalaria); Avena strigosa (Black Oats); and a control area (single maize) with five replications. Different aspects related to successor cultivation with soybean were evaluated taking into consideration agronomic aspects such as stem thickness, number of pods, plant height, the weight of one thousand grains and yield per hectare presented by the crop. The work demonstrated that brachiaria green manure in consortium with out-of-season corn crop promoted the highest plant height and number of pods for the soybean crop in succession.
Highlights
Intercropping systems are the cultivation of different plant species in the same period and area (Souza and Macedo, 2007)
The experimental unit consisted of a total area of 450 m2subdivided into plots of 5x3.6 m2, where out-of-season corn crop was cultivated intercropped with four other species, which were: T 1 - Brachiaria ruziziensis; T 2 - Raphanus sativus L (Forage Turnip); T 3 - Crotalaria spectabilis cv
The control treatment presented the highest yield (2,893 kg ha-1), not differing statistically from corn intercropped with Crotalaria spectabilis
Summary
Intercropping systems are the cultivation of different plant species in the same period and area (Souza and Macedo, 2007). According to DallAgnol et al (2010), when related to world agribusiness, soybean is among the economic activities that present the most significant growth in the last decades. This factor responds for several aspects, including the construction of an important international market supported by trade in soy products and the establishment of soy as a relevant source of vegetable protein, mainly because it attends the growing demand of the areas related to the production of animal origin, and greater elaboration and supply of technologies, which enabled the expansion of soy production to various regions of the world.
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