|Author:||Harpreet, Singh ; Hundal, S. S.|
|Book Group Author:||NA|
A field experiment was conducted on a loamy sand soil at Ludhiana, Punjab, India from June to October 1997 to evaluate the water use efficiency of the soyabean cultivars PK-416 and SL-295 grown under a line source sprinkler irrigation. The crop was sown after a uniform pre-sowing irrigation. Four variable irrigation treatments (I1, I2, I3, I4) were applied at 22, 90, 106 and 125 days after sowing (DAS). Higher amounts of water in the I4 and I3 treatments provided a better environment by avoiding moisture stress in the crop. The total crop water use amounted to 577.9, 530.0, 515.1 and 482.6 mm in PK-416 and 595.9, 542.1, 525.2 and 491.1 mm in SL 295 for the I4, I3, I2 and I1 treatments, respectively. Water use efficiency for straw and seed yield was highest for I3 and lowest for I1 in both soyabean cultivars. At a water application level beyond I3, water use efficiency decreased due to lower efficiency of the crop to utilize excess available water for increasing grain production. Dry matter production showed little differences under different water regimes. Increase in dry matter accumulation was rapid from 70 to 100 DAS and declined thereafter.
|Pages:||131 - 134|
|Journal:||Journal of Agrometeorology|
crop yield, cultivars, dry matter accumulation, plant waterrelations, seeds, soyabeans, sprinkler irrigation, straw, water useefficiency, Glycine (Fabaceae), Glycine max, Papilionoideae, Fabaceae,Fabales, dicotyledons, angiosperms, Spermatophyta, plants, eukaryotes,Glycine (Fabaceae), cultivated varieties, soybeans, spray irrigation,Field Crops (FF005) (New March 2000), Plant Breeding and Genetics(FF020), Plant Water Relations (FF062), Plant Production (FF100), SoilWater Management (Irrigation and Drainage) (JJ800) (Revised June 2002)[formerly Soil Water Management]