Effect of different levels of zinc on growth and uptake ability in rice zinc contrast lines (Oryza Sativa L.)

Rice (Oryza sativa) is the worlds’ most important cereal and potentially an important source of zinc (Zn) for people who eat mainly rice. Zinc deficiency being a major constraint to reduce the potential yield of rice. To improve Zn delivery by rice, plant Zn uptake and internal allocation need to be better investigated. Field experiments were carried out to find out the effect of three different levels of zinc on rice zinc contrasting lines, high zinc groups and low zinc groups. The experiments revealed that increased Zn supply induced increased plant Zn uptake rate throughout the crop development in both high zinc groups and low zinc groups. The highest effect was observed when treated with 30kg ZnSO4 /ha irrespective of zinc groups. However, high zinc groups showed better uptake ability in zinc content and overall performance in growth characteristics. This studies could help in identifying for genotypes with high zinc uptake ability in zinc content for further breeding programs.

Author(s): Muamba J. Kabeya* and Ambara G. Shankar

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