Yield and yield components of wheat subjected to water stress under rainfed conditions in Pakistan.

Book Title: NA
Year Published: 2003
Month Published: NA
Author: Kazmi, R. H. ; Khan, M. Q. ; Abbasi, M. K.
Book Group Author: NA
Abstract:

Pot experiments were conducted to study the effects of water stress on the yield and yield components of wheat cultivars Inqlab-91, Chakwal-97, Rawal-87, and Kohsar-95. The treatments comprised control, i.e. 4 recommended irrigations at tillering (30 days after sowing, DAS), heading initiation (60 DAS), anthesis (90 DAS), and grain filling (120 DAS); terminal drought, i.e. only one irrigation at 30 DAS; post-anthesis drought, i.e. irrigations at 30 and 60 DAS; irrigations at 60, 90, and 120 DAS; pre-anthesis drought, i.e. irrigations at 90 and 120 DAS. Data were recorded for flag leaf area, ear stalk length, number of grains per spike, and grain yield per plot. The flag leaf area and ear stalk length significantly decreased by 14 and 36%, respectively, when wheat was subjected to water stress. The proportional reduction in yield was 40% with 3 irrigations and 98% with pre-anthesis drought depending on the extent and degree of stress. The results showed that wheat could withstand and tolerate drought only up to anthesis. The critical stage for moisture in wheat started 60 days after germination, and was more severe at 90 days. Inqlab-91 was drought tolerant.

Pages: 315 - 323
URL: http:////0-search.ebscohost.com.catalog.library.colostate.edu/login.aspx?direct=true&AuthType=cookie,ip,url,cpid&custid=s4640792&db=lah&AN=20033205967&site=ehost-live
Volume: 51
Number: 3
Journal: Acta Agronomica Hungarica
Journal ISO: NA
Organization: NA
Publisher: NA
ISBN: NA
ISSN: 0238-0161
DOI: NA
Keywords:

crop growth stage, crop yield, cultivars, droughtresistance, flag leaf, irrigation, leaf area, plant development, plantwater relations, pot experimentation, water stress, wheat, Pakistan,Triticum, Triticum aestivum, Poaceae, Cyperales, monocotyledons,angiosperms, Spermatophyta, plants, eukaryotes, Triticum, South Asia,Asia, Developing Countries, Commonwealth of Nations, cultivatedvarieties, drought tolerance, watering, Field Crops (FF005) (New March2000), Plant Breeding and Genetics (FF020), Plant Water Relations(FF062), Plant Production (FF100), Soil Water Management (Irrigation andDrainage) (JJ800) (Revised June 2002) [formerly Soil Water Management]

Source: EBSCO
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