All-India Co-ordinated Research Project on Water Management, TCB College of Agriculture and Research Station, Indira Gandhi Agricultural University, Bilaspur, Chhattishgarh, 495001
1Present address: Water Technology Centre, I.A.R.I., New Delhi 110 012
A field experiment was conducted during the winter (rabi) seasons of 1996–97 to 1998–99 at Bilaspur, Chhattisgarh, to study the yield, water use and nutrient uptake of wheat (Triticum aestivum L emend. Fiori & Paol.) as affected by varieties, irrigation and nitrogen level under late-sown conditions. Among the varieties, ‘DL 788-2’ and ‘DL 803-3’ were superior to ‘GW 190’ and ‘GW 173’. Irrigation applied at 1.2 IW: CPE ratio gave significantly higher grain yield than 0.6 and 0.9 ratios. Application of 120 kg N/ha gave higher yield and yield attributes than 80 kg N/ha. Total nutrient uptake was positively influenced by irrigation and N levels. Total water use was lowest (29.60 cm), while water-use efficiency was highest with 0.6 IW: CPE. The WUE decreased with the increase in frequency of irrigation. The moisture depletion from upper soil layers (0–60 cm) was higher than lower layers (60–90 cm). However, total profile moisture contribution was highest with limited water supply (0.6 IW: CPE) and decreased with the increase in number of irrigation. Canopy temperature was comparatively low than ambient temperature under higher moisture (1.2 or 0.9/1.2 IW: CPE) than lower moisture regime (0.6 IW: CPE).
Canopy temperature, Grain yield, Irrigation, Moisture extraction, Nutrient uptake, Water use, Wheat
