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Residual Effect of Green Manure with Different Grass/Legume Ratios on the Sequential Cultivation of Broccoli and Brachiaria

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Abstract

The objective of this research was to examine how the same amount of N provided by pure or mixture composition of legume and grass affects the growth and yield of the first following crop (broccoli) and two more subsequent crops (broccoli and brachiaria grass). The first broccoli crop was fertilized with jack bean (JB) and pearl millet (PM) in the following proportions (%): control, 100JB, 75JB25PM, 50JB50PM, 25JB75M, and 100PM. The treatment residual effect was measured on a second broccoli crop and brachiaria grass, with no addition of fertilizer. Biochemical metabolism, canopy area, dry matter production, fresh matter yield, and nitrogen (N) accumulation were evaluated. In broccoli crops (first and residual), higher canopy area, fresh matter yield, dry matter, N accumulation, protein, and amino acid concentrations were detected with 100JB and 75JP25PM compared to the control. In the third crop (brachiaria grass), a greater residual effect on the dry matter and N accumulation were obtained with 25JB75PM and 100PM compared to the control. Protein, amino acids, growth, yield, dry matter production, and N accumulation reached the highest values in two successive broccoli crops when fertilized with mixtures with a higher proportion of JB. A higher residual effect is obtained in brachiaria grass fertilized with higher proportion of pearl millet.

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Acknowledgements

We would like to thank CNPq for the financial assistance to the project. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001. Professor Wagner L. Araujo provided scientific support for the metabolic analysis. Sincere gratitude to field/laboratory technicians (Jose Francisco Duarte and Mariana Barros) who assisted in making the study successful.

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Correspondence to Maristela Watthier.

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Watthier, M., Peralta-Antonio, N., Oliveira, F.S. et al. Residual Effect of Green Manure with Different Grass/Legume Ratios on the Sequential Cultivation of Broccoli and Brachiaria. J Soil Sci Plant Nutr 22, 619–630 (2022). https://doi.org/10.1007/s42729-021-00683-x

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  • DOI: https://doi.org/10.1007/s42729-021-00683-x

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