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Asian Journal of Applied Sciences

Year: 2014  |  Volume: 7  |  Issue: 6  |  Page No.: 453 - 469

Distribution of Water and Nitrogen in Soil under Drip and Microsprinkler Irrigation Fertigation of Garlic (Allium sativum L.) Crop

S. Sivasakth, Manoj Khanna, Man Singh, S.S. Parihar, D.K. Singh, Raj Kumar and R.N. Sahoo


Nitrogen (N) is an essential plant nutrient which is taken up by the crops throughout the growing season. Field experiments were conducted on microirrigation fertigation in garlic crop during the crop growing season of 2008-09 and 2009-10 year (both drip and micro sprinklers). Four levels of nitrogen treatments namely 0, 40, 80 and 120 kg N ha-1 with three replications were applied in both the methods of irrigation in Randomized Block Design (RBD). Water requirement of garlic crop was estimated by using Penman-Monteith method. Periodic soil samples were collected along the lateral (at emitter, 12.5 and 25 cm from emitter ) as well as across the lateral (15 and 30 cm from the emitter) at three soil depths (0-15, 15-30 and 30-45 cm) in both methods of irrigation. The plant samples were also collected during the harvest in both the season. It was observed that the soil water content was relatively higher in upper profile and near the emitter in all the three observations at 24, 48 and 72 h after fertigation in both drip and microsprinkler irrigation. The results revealed that N concentration in active root zone (15-30 cm) in microirrigation was more than the initial N content. In the same layer adequate nitrogen availability was observed. Available nitrogen decreased from emitter to the boundary wetting zone in drip fertigation in contrary to microsprinkler fertigation. Nitrogen leaching was higher in drip fertigation than the microsprinkler due to more vertical movement of soil water leading to the movement of the nitrogen beyond the root zone. Nitrogen balance for the study indicated that leaching of nitrogen beyond the root zone increased with the level of nitrogen applied in both the methods of irrigation.

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