Effect of irrigation and nitrogen on soil water dynamics, productivity and input-use efficiency of Bt cotton (Gossypium hirsutum) in a Vertic Ustropept.
Year: 2009
Type: article
Abstract: A field experiment was conducted during 2006-08 in a mixed red and black calcareous soil at Coimabtore to study the effect of irrigation levels (protective irrigation and irrigation at 0.6 IW/CPE, 0.8 IW/CPE, 1.0 IW/CPE) and N levels (control, 60 kg N/ha, 90 kg N/ha and 120 kg N/ha) on soil water dynamics, productivity and input-use efficiency of 'RCH 2' Bt cotton (Gossypium hirsutum L.) under winter irrigated situation. It was observed that the seed cotton (1 980-2 160 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 nitrogen application. However there was no significant difference among 60, 90 and 120 kg N/ha 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 increase in the water-use efficiency due to N application over no nitrogen control. However, there was no significant difference in the water-use efficiency due to 60, 90 and 120 kg N/ha. The partial factor productivity of nitrogen 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 nitrogen-use efficiency without significant yield reduction in winter-irrigated situation in the southern zone of the country.
Language: English
Subfield: Soil Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W78637118