Introduction

The forage production in the Comarca Lagunera is intensive, so there is not enough time that allows the soil to recover. Silage corn crop in this region is second in importance with respect to the harvested area; that is why it is essential to search for strategies to recover the quality of the soils without affecting the yield.

Method

The production of silage corn was evaluated with the hybrid P3258W, from Pioneer. A commercial bio-inoculant was applied to the soil at doses of 0, 20 and 40 l ha-1, in combination with seven sources of fertilizer: vermicompost at 5 and 10 t ha-1, dairy cow manure in 80 t ha-1, inorganic fertilizer (191-75-30 NPK), and a commercial organic fertilizer at doses of 2.5 and 5 l ha-1 and the control. The experimental design was in randomized blocks, and the treatments in a split-plot arrangement, where the main plot was the bio-inoculant and the subplot was the source of fertilization. The variables evaluated were fresh and dry forage yield, plant height at harvest; soil samples taken after the harvest were evaluated for: organic matter, pH, electrical conductivity, inorganic nitrogen and phosphorus. In plant samples taken at harvest, total nitrogen and phosphorus were determined.

Results

There was significant differences in yield with respect to the fertilizer source and the best treatment was manure applied at a dose of 80 t ha-1. In the characteristics of the soil: organic matter, nitrogen and phosphorus showed significant differences among doses of soil bio-innoculant and among fertilizer sources. For plant nitrogen, differences were significant among doses of bio-inoculant and among fertilizer sources. In the case of plant phosphorus, the analysis showed a significant interaction among doses of bio-inoculant and fertilizer sources.

Conclusion

The production of silage corn can be carried out using bio-inoculants and organic fertilizers without affecting the yield and improving the content of organic matter, nitrogen phosphorus in the soil.

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