Nutrient deficiencies and their symptoms in upland rice
2011
Mghase, J.J. | Shiwachi,H. | Takahashi, H. | Irie, K., Tokyo Univ. of Agriculture, Sakuragaoka 1-1-1, Setagayatey Tokyo, 156-8502(Japan). Graduate School of Agriculture
Four upland rice varieties namely Norin 26 (Japonica type), Yar 2 (Indica type) and NERICA 1 and NERICA 4 were grown in nutrient solutions separately deficient of one of the following elements: N,P,K,Ca and Mg, to examine deficiency symptoms as well as the effects on growth and grain yield. All varieties showed similar response to any of the deficient nutrient element at different levels. P and N deficiencies were the most growth limiting factors at the early growth period of all varieties. NERICA 1 and NERICA 4 varieties recorded the lowest yield reduction due to nutrient deficiencies. The results indicate that NERICA varieties which are interspecific hybrids of Oryza sativa L. and Oryza glaberrima Steud have relative advantage over their cultivated rice parent O. sativa L., which was represented by Norin 26 and Yar 2, for cultivation under nutrient deficient low fertile soil of the upland ecosystems.
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