EFFECT OF ZINC MANAGEMENT AND VARIETIES ON YIELD AND ZINC BIOFORTIFICATION IN RICE (Oryza sativa L.)
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Date
2015
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Institute of Agricultural Sciences, Banaras Hindu University
Abstract
the importance of zinc concentration in rice grain, the present investigation “Effect of zinc management and varieties on yield and zinc biofortification in rice (Oryza sativa L.)” was conducted at Agricultural Research Farm, Institute of Agricultural Sciences, Banaras Hindu University. The experiment was laid out in randomized block design with three replication consists of three varieties viz., HUR 105 [V1], HUBR 2-1[V2] and PHB-71 [V3] and seven zinc management treatments i.e. Control [Z0], Zn (EDTA) @ 0.5 kg ha-1 at basal [Z1], Zn (EDTA) @ 0.25 kg h-1 at basal + 0.25 kg ha-1 at maximum tillering stage[Z2], Zn (EDTA) @ 1.0 kg ha-1 at basal [Z3], Zn (EDTA) @ 0.5 kg ha-1 at basal + 0.5 kg ha-1 at maximum tillering stage[Z4], Zn (EDTA) @ 0.05% 3 spray at 15 days interval (starting with maximum tillering stage)[Z5] and Zn (EDTA) @ 0.25 kg ha-1 at basal + Zn (EDTA) @ 0.05% spray at maximum tillering stage[Z6]. Among the varieties ‘PHB-71’ recorded significantly higher with all growth parameters, yields attributes and yield over ‘HUR 105’ and ‘HUBR 2-1. Zinc management had also significant influence on growth parameters, yield attributes and yield of rice. The treatment, Zn (EDTA) 0.25 kg ha-1 at basal + Zn (EDTA) 0.05% spray at maximum tillering stage (Z6) recorded significantly higher growth parameters, yield attributes and yield of rice followed by Zn (EDTA) 0.5 kg ha-1 at basal + 0.5 kg ha-1 at maximum tillering stage (Z4). In respect to zinc content in rice grain, the variety HUBR 2-1 recorded significantly maximum Zn content followed by ‘HUR 105’ than PHB 71. The zinc management treatment, Zn (EDTA) 0.05% 3 spray at 15 days interval (starting with maximum tillering stage) (Z5) recorded significantly maximum zinc content followed by Zn (EDTA) 0.25 kg ha-1 at basal + Zn (EDTA) 0.05% spray at maximum tillering stage (Z6) and Zn (EDTA) 0.5 kg ha-1 at basal + 0.5 kg ha-1 at maximum tillering stage (Z4). Rice varieties and zinc management treatment significantly interact with each other and maximum zinc content was recorded with HUBR 2-1 × Zn (EDTA) 0.05% 3 sprays at 15 days interval (starting with maximum tillering stage). The varieties had non-significant variation in respect to gross return, net return and benefit: cost ratio. However, Zn (EDTA) 0.25 kg ha-1 at basal + Zn (EDTA) 0.05% sprays at maximum tillering stage (Z6) recorded maximum net return and B: C ratio than other zinc management practices. Quality parameter such as hulling percentage, protein content and protein harvest PHB-71’ (V3) recorded higher value than HUR 105’ (V1) and ‘HUBR 2-1(V2) whereas, the maximum milling and head rice recovery was recorded with HUR 105’ (V1) which was followed by ‘HUBR 2-1(V2) and PHB-71’ (V3). Zinc management had significant influence on all the quality parameters and recorded maximum with Zn (EDTA) 0.25 kg ha-1 at basal + Zn (EDTA) 0.05% spray at maximum tillering stage (Z6).
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Keywords
Rice, varieties, zinc, biofertification, growth, yield, quality, economics