Water use efficiency in mexican wheat triticum aestivum cultivar hd m 1553 sonalika as influenced by nitrogen fertilization and irrigation management
Patil, T.T.; Khuspe, V.S.
Journal of Maharashtra Agricultural Universities 3(3): 219-223
1978
ISSN/ISBN: 0378-2395 Accession: 006914817
'Sonalika' was subjected to 3 N and 4 irrigation levels for studies of water requirement, consumptive use, water use efficiency and yield potential during the rabi seasons of 1975-76 and 1976-77 [in Golegaon India]. N fertilization at the rate of 100 kg N/ha significantly increased earhead length and grain weight per plant over 50 kg N/ha in both seasons. Earhead number and grain number per plant were significantly more with 100 kg N/ha over 50 and 75 kg N/ha. The 1000-grain weight was adversely and significantly affected in the 2nd yr. Increase in the level of irrigation beyond 130 mm CPE [cumulative pan evaporation] (I1) significantly enhanced all traits under study. Application of 100 kg N/ha significantly increased grain yield over 50 and 75 kg N/ha in 1975-76 and in pooled data. Irrigations scheduled at 40 and 70 mm CPE in 1975-76 and at 40 mm CPE in 1976-77 significantly produced higher yields. The maximum water use efficiency of 15.87 and 13.87 kg/ha mm-1 was recorded with 70 mm CPE in 1975-76 and with 130 mm CPE in 1976-77, respectively. The consumptive use recorded at the highest efficiency with 70 and 130 mm CPE was 219.4 and 179.8 mm during the 1st and the 2nd season, respectively. The seasonal water requirement ranged 270-286 mm in 130 mm CPE treatment and 451-558 mm in 40 mm CPE treatment. ETR [evapotranspiration ratio] values increased with irrigation level.