Agro-economic aspects of liming and fertilization of sprinkler irrigated rice and bean crop
Seven field experiments were conducted to obtain agroeconomic information about liming and fertilization of common bean (Phaseolus vulgaris L.) and of upland rice (Oryza sativa L.). In the 1st experiment there were 36 plots, half of these received liming and the rest half did not receive liming. All the plots received fertilization at the rate of 50-100-60 kg/ha of N-P2O5-K2O, respectively. In the 2nd experiment, plots; with and without liming, six did not receive fertilization (00-00-00), six received same fertilization of the earlier, and remaining six received 70-120-82 kg/ha of N-P2O5-K2O, respectively. The lime was applied for three times during the experimental period, totaling 7.6 t/ha (lime neutralizer power = 100%). The 6th experiment consisted of treatments with increasing levels of formulated fertilizer (0, 200, 400, 600, 800 and 1000 kg/ha). In the 7th experiment, increasing levels of N were tested (0, 30, 60, 90 and 120 kg/ha). Total yield of bean during the experiment period increased 54% by liming and benefit/cost ratio was 9.3. For rice, yield increase was 14%. Common bean responded up to maximum level of N (120 kg/ha) applied as topdressing. For bean crop maximum economic level was 359 kg/ha applied through 4-50-16 formulation, with net benefit of 8.6 bags of 60 kg each and benefit/cost ratio of 1.3.
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| Format: | Digital revista |
| Language: | por |
| Published: |
Pesquisa Agropecuaria Brasileira
1994
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| Online Access: | https://seer.sct.embrapa.br/index.php/pab/article/view/4220 |
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