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Navjot Singh ¹, Krishan Kumar Vashist ¹, S. S. Mahal ¹, Amandeep Singh Sidhu ²

Affiliations
1 Department of Agronomy, Punjab Agricultural University, Ludhiana, Punjab, IN
2 Department of Agronomy, Krishi Vigyan Kendra (PAU), Havali Kalan, Ropar, Punjab, IN

Abstract

A field investigation was carried out in Punjab Agriculture University, Ludhiana during the Kharif 2005 to evaluate the effect of varying irrigation management practices in furrow and bed transplanted rice on irrigation water saving and water expense efficiency. Bed and furrow transplanting under various methods of irrigation i.e. (F), (Inun. B+F) and (Inun.B), were at par with each other. Pretilachlor @ 0.75kg/ha applied as sand mix one DAT gave significantly better control of weeds species in bed and furrow transplanting when irrigation water was allowed just to pass over the bed for first 15 days after transplanting under (Inun. B+F) method of irrigation in comparison to irrigation in furrow throughout after transplanting under (F) method of irrigation. The treatment 2R/F(Inun. B+F) × herbicide yielded at par, resulted in 19.9 per cent saving in total water expense, 23.9 per cent saving in terms of net water expense and 27.7 per cent increase in net water expense efficiency when compared with recommended practice × herbicide i.e. Flat(BM) × herbicide.

Keywords

Bed/furrow Transplanting, Border Method of Irrigation, Inundating, Water Expense Efficiency, Rice

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¹, ², S. S. Mahal ²

Affiliations
1 Department of Agronomy, Punjab Agr, Punjab, IN
2 Department of Agronomy, Punjab Agricultural University, Ludhiana, Punjab, IN

Abstract

A field experiment was conducted at Punjab Agricultural University Ludhiana, during late Kharif 2009-10 to study the effect of different irrigation regimes (IW/CPE ratio 0.50, 0.75, 1.00 and 1.25) and nitrogen rates (100, 125, 150 and 175 kg N ha^-1) on ischolar_main growth, nutrient uptake and yield of August sown hybrid maize. The irrigation regimes I_1.25 (3 irrigations) and I_1.00 (3 irrigations) produced the grain yield of 83.1 and 81.2 q ha^-1, respectively, which was significantly higher than the grain yield observed under I_0.75 (2 irrigations) and I_0.50 (1 irrigation). Root density was higher in surface soil layers i.e., 0-15 and 15-30 cm soil profile under adequate irrigation regimes (I_1.25 and I_1.00) which was statistically at par with each other but reverse trend was observed in deeper layers where ischolar_main density was higher under deficit irrigation regimes. Nutrient uptake by maize i.e. N, P and K was also higher at higher irrigation regimes. Among nitrogen rates, N₁₅₀ and N₁₇₅ being statistically at par with each other gave significantly higher grain yield over N₁₂₅ and N₁₀₀. Similar trend was observed for ischolar_main density in different soil layers. Total N, P and K uptake was also higher at N₁₇₅ which was significantly higher than other nitrogen levels in case of total N and P uptake whereas it was statistically at par with N₁₅₀ in case of total K uptake.

Keywords

August Sown Hybrid Maize, Irrigation Regimes, Nitrogen Levels, Root Density, Nutrient Uptake

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