Grain quality assessment of direct seeded basmati rice (Oryza sativa L.) under different irrigation regimes in Indian Punjab
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Abstract
Irrigation water, being a scarce resource, requires proper management for good quality aerobic basmati rice production. Field experiments were conducted at Punjab Agricultural University, Ludhiana to evaluate the effect of different irrigation schedules on grain quality of direct seeded basmati rice ‘Pusa Basmati 1121’. Ten treatments comprising of conventional puddled transplanting and nine in direct seeding were tested in randomized block design with four replications. Direct seeding treatments comprised of combination of withholding first irrigation for 6, 9 or 12 days after sowing and follow up irrigations at 30, 50 or 70 mm cummulative pan evaporation (CPE). The milling quality characters of rice like brown, milled and head rice recoveries were highest in conventional transplanting (81.4, 70.9 and 52.4 %, respectively) statistically at par with irrigation schedule of withholding first irrigation for 6 days and subsequent irrigations at 30 mm CPE (80.3, 69.9 and 51.1 %,respectively) significantly better than rest of the treatments.The other quality characters like protein content, minimum cooking time, elongation ratio etc. were also significantly affected by different irrigation schedules at 5 % level of significance. The maximum values of protein content (7.26 %) and minimum cooking time (23.5 minutes) were obtained in irrigation schedule of withholding first irrigation for 6 days and subsequent irrigations at 30 mm CPE whereas elongation ratio was maximum in conventional transplanting (1.87). In Indian Punjab, good quality direct seeded basmati rice can be obtained by holding the first irrigation for 6 days and then irrigating at 30 mm CPE with yields comparable to transplanted rice.
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Aerobic rice, Cooking quality, Hectolitre weight, Milling and transplanted rice
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