Effect of liming on chemical coniposition, physiologic quality and field performance of beans seed

Abstract

Common bean (Phaseolus vulgaris L) seeds from the cultivars IPA 7419 and Rio Tibagi, harvested from plants grown in soil that had received 0.5, 1.5 and 4.0 t/ha of dolomitic limestone, were submitted to germination and vigour tests and chemically analyzed (N, P, Ca, Mg, and Zn). Them they were seeded in two field yield trials: One in the rainy season, and the other in the dry season. In those trials, two cultivars x three seed origins (C₁ - harvested from plots that had received 0,5 t/ha of limestone; C₂ = 1.5 t/ha, and C₃ = 4,0 t/ha) - x two levels of fertilization (0-30-0 and 30-100-60 kg/ha of N-P₂O₅,-K₂O) were used. No significant difference of seed weight and germination was found among the seeds of different origins. The highest limestone dosage yielded seedlings with the greatest aerial part dry weight. Generally the amount of P, K, and Mg and the percentage of Mg in the seeds increased with the increase of the limestone quantity. In the rainy season yield trial, C₁ seeds from the cv. IPA 7419 produced the smallest initial and final stand. In the dry season, the C₁ seeds from the cv. IPA 7419 produced the smallest initial stand; in relation to the final stand, C₃ seeds were superior to C₁ seeds, but both did not differ significantly from the C₂ seeds. Only in the dry season trial did seed origins affect yield: C₃ seeds from the cv. IPA 7419 yielded more than the C₁ seeds when fertilized with 30-100-60, the highest fertilization level applied.