Response of American cotton (Gossypium hirsutum) to methods of irrigation and levels of phosphorus under shallow ground water-table condition.

Book Title: NA
Year Published: 2009
Month Published: NA
Author: Bhunia, S. R.
Book Group Author: NA

A field experiment was conducted during the rainy (kharif) seasons of 2002-04 at Hanumangarh, Rajasthan, India, to study the yield, benefit:cost ratio and water use efficiency of 'RS 2013' American cotton (Gossypium hirsutum) under high ground water-table conditions. Flood irrigation gave the highest seed cotton yield (2.44 tonnes/ha), monopodials/plant (8.7) and sympodials/plant (14.6), compared with furrow, alternate furrow and alternate furrow in rotation. Height (170.3 cm), boll/plant (80.5) and boll weight (3.39 g) were higher with flood irrigation but at par with furrow irrigation and superior to the rest of the irrigation treatments. Similarly, flood irrigation gave the highest water use (384.3 mm), benefit:cost ratio (3.70) and sustainable yield index (86.54%) than all other irrigation methods. However, the highest water-use efficiency of 6.55 kg/ha-mm was recorded with furrow irrigation in rotation. Between the 2 phosphorus levels, 22.5 kg P/ha gave significantly higher seed cotton yield (2.19 tones/ha), sympodial/plant (13.3), boll/plant (75.3), boll weight (3.30) and higher sustainability yield index (79.82%) and benefit:cost ratio (3.25). Water-table depth was lowest at sowing in most of the years, thereafter water-table decreased up to the end of October and then it decreased further at harvest. Electrical conductivity (EC) of soil at harvest was highest with irrigation in alternate furrow, followed by alternate furrow in rotation, furrow and flood irrigation method. EC of groundwater was slightly higher at furrow irrigation in alternate rows, and furrow irrigation in alternate rows in rotation compared to flood and furrow irrigation treatments. The pH of the soil at harvest and groundwater at active growing stage was not affected by irrigation methods.

Pages: 364 - 366
URL: http:////,ip,url,cpid&custid=s4640792&db=lah&AN=20093150882&site=ehost-live
Volume: 79
Number: 5
Journal: Indian Journal of Agricultural Sciences
Journal ISO: NA
Organization: NA
Publisher: NA
ISSN: 0019-5022

application rates, bolls, cost benefit analysis, cotton,crop yield, electrical conductivity, furrow irrigation, irrigation,phosphorus fertilizers, plant height, plant water relations, soil pH,water use efficiency, India, Rajasthan, Gossypium, Gossypium hirsutum,Gossypium, Malvaceae, Malvales, dicotyledons, angiosperms,Spermatophyta, plants, eukaryotes, South Asia, Asia, DevelopingCountries, Commonwealth of Nations, India, phosphate fertilizers,watering, Agricultural Economics (EE110), Field Crops (FF005) (New March2000), Plant Production (FF100), Plant Water Relations (FF062),Fertilizers and other Amendments (JJ700), Soil Water Management(Irrigation and Drainage) (JJ800) (Revised June 2002) [formerly SoilWater Management]

Source: EBSCO
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