Response of rice cultivars to zinc in sodic soil
The response of rice cultivars to Zn in sodic soil were investigated. The treatments consisted of 3 levels of zinc in the main plot i.e. 0, 25 and 50 kg of ZnSO4 ha-1 and two native land races Bejhari and Kalmuhil; two salt tolerant rice cultivars, Vikash and CSR-10 and two popular high yielding varieties Sarjoo-52 and PB-1 in the sub plots replicated four times. Yield of different rice cultivars increased significantly with increasing levels of zinc upto 50 kg ha-1. The grain yield of Bejhari was at par with Kalmuhi during both the years whereas the grain yield of Vikash, CSR-10, Sarjoo-52 and PB-1 differed significantly from each other within their groups. The uptake of zinc by grain and straw increased significantly with increasing levels of zinc upto 50 kg ZnSO4 ha-1 during both the years. The zinc utilization efficiency of different rice cultivars declined with increase in the rates of zinc application. Zinc utilization efficiency was higher in the varieties Bejhari,CSR-10 and Sarjoo-52. The two native land races Bejhari and Kalmuhi responded less to zinc application as compared to salt tolerant rice cultivars and HYVs.
Author : U.N. Singh and B.N. Tripathi
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