Vol. 7, Issue 2 (2019)
Water productivity and nutrient uptake of direct seeded early Ahu rice under medium land situation
Author(s): Dibyarishi Bhattacharjya, Krishna Bharadwaj, Abhijit Sarma, Kakali Konwar, Kushal Sarmah, JC Das and Uddipana Shandilya
Abstract: A field experiment was carried out at Assam Agricultural University, Jorhat to find out water productivity and nutrient uptake of direct seeded early ahu rice under medium land situation. The treatments consisted of 4 irrigation regimes viz. irrigation at 80% available water till onset of pre-monsoon rain (I1), irrigation at 70% available water till onset of pre-monsoon rain (I2), irrigation at 60% available water till onset of pre-monsoon rain (I3) and rainfed (I4) as main plot and 3 nutrient management treatments viz. full P as basal + ½ N and ½ K at 20 DAS + ½ N and ½ K at 40 DAS (N1), full P as basal, 1/3 N and 1/3 K as basal + 1/3 N and 1/3 K at 20 DAS + 1/3 N and 1/3 K at 40 DAS (N2) and full P as basal, ½ N and ½ K as basal + ¼ N and ¼ K at 20 DAS + ¼ N and ¼ K at 40 DAS (N3) as sub plot and control (transplanted early ahu rice with recommended water and fertilizer management practices). Experimental findings revealed that irrigation at 80% available water till onset of pre monsoon rain (I1) recorded the highest nutrient (N, P and K) uptake and water productivity of the crop. Among the nutrient management treatments, the highest nutrient uptake and water productivity were recorded under full P as basal + ½ N and ½ K at 20 DAS + ½ N and ½ K at 40 DAS (N1). The direct seeded rice recorded lower water use and higher water productivity and nutrient balance than transplanted crop.
Pages: 2113-2117 | 348 Views 50 Downloads
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How to cite this article:
Dibyarishi Bhattacharjya, Krishna Bharadwaj, Abhijit Sarma, Kakali Konwar, Kushal Sarmah, JC Das, Uddipana Shandilya. Water productivity and nutrient uptake of direct seeded early Ahu rice under medium land situation. Int J Chem Stud 2019;7(2):2113-2117.
