Abstract
A study was undertaken at Regional Research and Technology Transfer Station, Chiplima, Sambalpur, Odisha on rice var. khandagiri during summer season of 2011, 2012 and 2013 in split plot design with three irrigation schedule (main plots) and three date of transplanting (sub plots). Experimental results indicated that the irrigation schedules at one day after disappearance of ponded water (DPW) recorded the highest grain yield of 3.07 t ha-1 which was at par with irrigation schedule at 2-days after DPW. Both the irrigation schedules were significantly superior over 3-days after DPW. The date of transplanting on 15th January produced highest grain yield (3.11t ha-1) which was significantly superior to other transplanting date on 30th January and 15th February. Highest water use efficiency was observed with irrigation schedule at 3-days after DPW (43.7 kg ha-cm-1) and transplanting on 15th January(43.2 kgha-cm-1). The treatment that received irrigation schedule at 1-day after DPW registered the highest dry matter heat use efficiency (3.62 kg ha-10C day-1) and grain yield heat use efficiency(1.84 kg ha-10C day-1).The transplanting on 15th January produced highest dry matter heat use efficiency(3.83 kg ha-10C day-1) and grain yield heat use efficiency(2.05 kg ha-10C day-1) which was significantly superior to other transplanting dates of 30th January and 15th February.
Highlights
Rice (Oryza sativa L.) plays an important role in providing food to two third of the world population inAsian countries
Heat use efficiency (HUE) i.e efficiency of utilization of heat in terms of drymatter accumulation or economic yield of rice depends on solar radiation interception, leaf area development and crop management practices (Aggarwal et al.2015)
Keeping the above facts in to consideration, the present investigation was planned to find out proper transplanting date and irrigation schedule for rice cultivation during summer season
Summary
Rice (Oryza sativa L.) plays an important role in providing food to two third of the world population inAsian countries. In India, demand for rice is growing every year and it is estimated that by 2025AD the requirement would be 140 million tonnes. To sustain present food self-sufficiency and to meet future food requirements, India has to increase its rice productivity bythree per cent per annum (Thiyagarajan and Selvaraju, 2001).Date of transplanting is a vital factor that affects grain yield of summerrice considerably. Irrigation plays a vital role in increasing the productivity of rice though the efficiency and productivity of water are very low due to percolation losses and higher water requirement. It is essential to find out proper irrigation schedule especially during dry season to maintain proper growth and yield of rice. Keeping the above facts in to consideration, the present investigation was planned to find out proper transplanting date and irrigation schedule for rice cultivation during summer season
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