Abstract
A field study was conducted in sandy loam soil to monitor the crop performance and irrigation water productivity of direct dry seeded rice under soil matric potential based intermittent irrigation at different growth stages. The treatments included four soil matric potential based irrigation scenarios viz 10-10-10, 10-20-10, 10-10-20 and 20- 20-20 kPa at 3-leaf to panicle initiation (PI), PI to flowering and flowering to physiological maturity stages during 2011-12. The yield attributes viz panicle density, grains per panicle and thousand grain weight were statistically similar in all the treatments. The biomass and tiller density at different growth stages did not vary with differential irrigations. The grain and biomass water productivities, though higher during 2011 than in 2012, were statistically similar under different irrigation scenarios. Soil matric potential at 10 cm depth indicated sufficient drying of soil (>20 kPa) under the wettest (10-10-10 kPa) treatment and >40 kPa in the driest (20-20-20 kPa) treatment.
Mahesh Chand Singh, Naveen–Gupta , S.S. Kukal. (2016) Land and water productivity of direct seeded rice in relation to differential irrigation scenarios in Indian Punjab, The Journal Soil & Environment , Volume 35, Issue 1.
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