Effect of seeding time row spacing, and plant density of yields of forage sorghums
Several field experiment were conducted to observe the performance of introduced hybrid forage sorghums, to compare them with native varieties and to study the effects of row spacing, plant density, and seeding time on dry matter production. For the the competition tests, the best local corn variety was introduced in order to compare its production with that of the forage sorghums. The native varieties of forage sorghum, Lavrense, Fartura and Santa Eliza, gave the highest production of dry matter, 14.67, 13.67 and 12.90 tons per hectare, respectively. The following year a new experiment was set up to determine the best plant population for forage sorghum in this area. The densities consisted of 9, 12 and 15 plants per meter in the row. The results again showed that the native varieties were more productive. There were no significant effects of density. Interaction efforts between plant density and variety were also non-significant. A third experiment was conducted on the native Santa Eliza variety. Three plant densities were studied. The row spacings were 0.60, 0.80 and 1.00 meters and the plant densities in the row were 10 and 20 plants per meter planted singly and two plants per hill planted 0.25 meters apart in the row. The results showed no significant effect for row spacing or for plant density. The intercation row spacing X plant density was significant. This experiment was repeated twice in two years. The fourth and last experiment was conducted during three consecutive years. Six seeding times, starding on October 25 and at 10-day intervals were analysed. The results did not show any effect of the seeding time on dry matter production, except for the first year of the experiment. In this case, there was a significant difference between the planting date of October 25 and November 27 with the Santa Eliza variety. The dry matter production of the two varieties Fartura and Santa Eliza, which were compared in the experiment, did not show any significant difference.
| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | por |
| Published: |
Pesquisa Agropecuaria Brasileira
2014
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| Online Access: | https://seer.sct.embrapa.br/index.php/pab/article/view/17421 |
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