|Author:||Rajanna, A. E. ; Ramachandrappa, B. K. ; Nanjappa, H. V. ; Soumya, T. M.|
|Book Group Author:||NA|
A field experiment was conducted during the summer season of 2000 at the Main Research Station, University of Agricultural Sciences, Hebbal, Bangalore, Karnataka, India, to determine the effects of irrigation and fertilizer rates on the soil plant water status and yield of baby maize (Zea mays). Treatments comprised: seven irrigation schedules and two fertilizer levels. The maximum husked (11.28 t/ha), dehusked (2.99 t/ha) and fodder yields (24.12 t/ha) of baby maize were recorded with irrigation at 1.0 IW:CPE ratio throughout the crop growth stages, which were significantly superior over irrigation at 0.75 IW:CPE ratio during 41 DAS to harvest and throughout the crop growth stages. Irrigation at 0.75 IW:CPE ratio during 10-25 DAS recorded higher water use efficiency of 29.76 kg/ha-mm, with a total water requirement of 361.6 mm. Irrigation schedule at 1.0 IW/CPE ratio throughout the crop growth stages resulted in higher available soil moisture (51.09-53.35%) and lower soil moisture tension (-90 to -101 Kpa) in the 0- to 30-cm soil layer. Consequently, leaf water potential (-671 Kpa) and relative water content were significantly higher compared to other irrigation levels. Vegetative stage followed by development of baby maize stage is critical for moisture stress as indicated by crop susceptibility and yield response factors. Application of 150:75:40 kg NPK/ha resulted in significantly higher husked (10.56 t/ha), dehusked (2.58 t/ha) and green fodder yields (21.18 t/ha) compared to the 100:50:27 kg NPK/ha treatment.
|Pages:||74 - 82|
|Journal:||Mysore Journal of Agricultural Sciences|
application rates, crop growth stage, crop yield, husks,irrigation, irrigation scheduling, leaf water potential, maize, plantwater relations, soil water, water content, water requirements, wateruse efficiency, India, Karnataka, Zea mays, Zea, Poaceae, Cyperales,monocotyledons, angiosperms, Spermatophyta, plants, South Asia, Asia,Developing Countries, Commonwealth of Nations, India, corn, hulls,Mysore, soil moisture, watering, Field Crops (FF005) (New March 2000),Plant Water Relations (FF062), Plant Production (FF100), Fertilizers andother Amendments (JJ700), Soil Water Management (Irrigation andDrainage) (JJ800) (Revised June 2002) [formerly Soil Water Management]