Effect of irrigation and nitrogen on soil water dynamics, productivity and input-use efficiency of Bt cotton (Gossypium hirsutum) in a Vertic Ustropept.

Book Title: NA
Year Published: 2009
Month Published: NA
Author: Bandyopadhyay, K. K. ; Prakash, A. H. ; Sankaranarayanan,K. ; Dharajothi, B. ; Gopalakrishnan, N.
Book Group Author: NA

Field experiments were conducted in Tamil Nadu, India, from 2006 to 2008, in a mixed red and black calcareous soil, to study the effect of irrigation levels (protective irrigation and irrigation at 0.6, 0.8 and 1.0 IW/CPE) and N levels (control, 60, 90 and 120 kg N/ha) on soil water dynamics, productivity and input-use efficiency of Bt cotton cv. RCH 2 under winter irrigated situations. It was observed that the seed cotton (1980-2160 kg/ha) and lint yield (700-772 kg/ha) under different irrigation treatments were statistically at par with the protective irrigation, but increased significantly due to N application. However, there was no significant difference among the 60, 90 and 120 kg N/ha rates with respect to seed cotton and lint yield. There was significant reduction in water use efficiency of cotton with the increase in the level of irrigation, but there was an increase in the water use efficiency due to N application over the control. However, there was no significant difference in the water use efficiency due to 60, 90 and 120 kg N/ha rates. The partial factor productivity of N decreased significantly with the increase in irrigation and N levels. Thus, RCH2Bt cotton hybrid may be grown with protective irrigation and 60 kg N/ha to achieve higher water and N use efficiency without significant yield reduction in winter-irrigated situation in the southern zone of the country.

Pages: 448 - 453
URL: http://0-search.ebscohost.com.catalog.library.colostate.edu/login.aspx?direct=true&AuthType=cookie,ip,url,cpid&custid=s4640792&db=lah&AN=20093179052&site=ehost-live
Volume: 79
Number: 6
Journal: Indian Journal of Agricultural Sciences
Journal ISO: NA
Organization: NA
Publisher: NA
ISSN: 0019-5022

application rates, cotton, crop yield, irrigation, nitrogenfertilizers, plant water relations, transgenic plants, use efficiency,water use efficiency, India, Tamil Nadu, Gossypium, Gossypium hirsutum,plants, Gossypium, Malvaceae, Malvales, dicotyledons, angiosperms,Spermatophyta, plants, eukaryotes, South Asia, Asia, DevelopingCountries, Commonwealth of Nations, India, genetically engineeredplants, genetically modified plants, GMOs, Madras, watering, Field Crops(FF005) (New March 2000), Plant Breeding and Genetics (FF020), PlantWater Relations (FF062), Plant Production (FF100), Fertilizers and otherAmendments (JJ700), Soil Water Management (Irrigation and Drainage)(JJ800) (Revised June 2002) [formerly Soil Water Management], GeneticEngineering, Gene Transfer and Transgenics (WW100) (New June 2002)

Source: EBSCO
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