Sources, levels and methods of potassium application in soil
A field experiment was carried out on a Red-Yellow Podzolic (Palendult) soil from the Itapoã soil mapping unit at Viamão, RS, Brazil, in 1981/82. to determine the efficiency of K sources (KCl, K2SO4 and KAISiO4 (kalsilite), the methods of application (broadcast with incorporation, in rows, and broadcast on the soil surface) and doses of zero, 150 and 300 kg/ha of K, on dry matter production and K uptake by millet (Pennisetum americanum (L.) Leeke) plants. There was neither effect of sources nor off methods of K application on dry matter production. The effect of K was significant up to the rate of 150kg/ha and 300kg/ha of K, respectively, on dry matter production and K uptake. Methods of application did not show any effect on the K absorption by millet. K absorption was higher when KCl was applied, in comparison with kalsilite application, while K2SO4 showed intermediate and nonsignificant values between these two sources.
| 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/15049 |
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| Summary: | A field experiment was carried out on a Red-Yellow Podzolic (Palendult) soil from the Itapoã soil mapping unit at Viamão, RS, Brazil, in 1981/82. to determine the efficiency of K sources (KCl, K2SO4 and KAISiO4 (kalsilite), the methods of application (broadcast with incorporation, in rows, and broadcast on the soil surface) and doses of zero, 150 and 300 kg/ha of K, on dry matter production and K uptake by millet (Pennisetum americanum (L.) Leeke) plants. There was neither effect of sources nor off methods of K application on dry matter production. The effect of K was significant up to the rate of 150kg/ha and 300kg/ha of K, respectively, on dry matter production and K uptake. Methods of application did not show any effect on the K absorption by millet. K absorption was higher when KCl was applied, in comparison with kalsilite application, while K2SO4 showed intermediate and nonsignificant values between these two sources. |
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