|Author:||Bharambe, P. R. ; Shelke, D. K. ; Oza, S. R. ; Vaishnava, V. G.|
|Book Group Author:||NA|
Field experiments were conducted during 1993/94 and 1994/95 on a Parbhani clay soil (Vertisol) in Maharashtra, India. Two planting patterns (normal and paired) and four irrigation schedules were used in the study (irrigation at 40% evapotranspiration (ET), 60, 80 and 100% ET). Soil water content was determined gravimetrically up to 0.60 m depth by sampling at sowing, before and after each irrigation and at harvest, and the soil water potential corresponding to moisture content at 0-0.30 m depth was worked out by using soil moisture characteristic curves. Water potential in the 3rd leaf of cotton plants from the top was measured at 14.00 h. Maximum water content was observed below the dripper point and it followed a decreasing trend with increasing spatial distance from the dripper. The soil moisture profile increased with increasing irrigation depth (irrigation schedules). The soil moisture distribution pattern was more or less similar under both planting patterns. The soil water potential varied from -50 to -300 kPa during August to November under the different irrigation schedules. The highest leaf water potential was maintained under the 80 and 100% ET schedules. However, it decreased at lower irrigation schedules under both planting patterns. Seed cotton yield significantly increased due to the drip irrigation system. Irrigation schedule at 60% ET under group planting was found to be optimum for cotton. The consumptive water use of cotton followed an increasing trend with the frequency of irrigation, with the highest at 100% ET. Water use efficiency was highest at 80% ET.
|Pages:||303 - 305|
|Journal:||Journal of the Indian Society of Soil Science|
clay soils, cotton, crop yield, evapotranspiration,irrigation, irrigation scheduling, leaf water potential, leaves, plantwater relations, soil types, soil water content, soil water potential,spatial distribution, trickle irrigation, Vertisols, water use, wateruse efficiency, India, Maharashtra, Gossypium, Malvaceae, Malvales,dicotyledons, angiosperms, Spermatophyta, plants, eukaryotes, SouthAsia, Asia, Developing Countries, Commonwealth of Nations, India,watering, Field Crops (FF005) (New March 2000), Plant Water Relations(FF062), Plant Production (FF100), Soil Physics (JJ300), Soil WaterManagement (Irrigation and Drainage) (JJ800) (Revised June 2002)[formerly Soil Water Management]