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| Titel: |
Response of wetland rice to potassium in farmers' fields of the Barind tract of Bangladesh |
| Auteur: |
Saleque, M. A. Saha, P. K. Panaullah, G. M. Bhuiyan, N. I. |
| Verschenen in: |
Journal of plant nutrition |
| Paginering: | Jaargang 21 (1998) nr. 1 pagina's 39-47 |
| Jaar: |
1998-01 |
| Inhoud: |
Six trials were conducted in the dry and wet seasons on potassium (K)-deficient Barind soils (Aeric Haplaquept) to evaluate the response of rice to potassium (K) fertilizer. The application of 30 kg K ha-1 significantly increased rice grain yields at all the test locations. In some cases, grain yield increased consistently up to 120 kg ha-1 of applied K. Rice yield responded quadratically to K application. The calculated maximum K doses were 114 kg ha-1 for the dry season and 165 kg ha-1 for the wet season. The calculated optimum doses of K application were 100 kg ha-1 and 147 kg ha-1 for the dry season and wet season, respectively. Application of K fertilizer increased K content only in the straw, but not in the grain. The K use efficiency of wetland rice at 30 kg K level was 16.7 kg grain kg-1 applied K in the dry season and 10.0 to 33.3 kg grain kg-1 applied K in the wet season. The K uptake by rice was higher in the dry season than in the wet season. The average apparent K recovery at 30 kg K ha-1 application level was 59%, which decreased gradually with an increase in the K dose. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 18 van 18 gevonden artikelen
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