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Tamil Nadu Agricultural University (2004)

Integrated rain water and nitrogen management for dryland maize under different rainfall situations

Venkata lakshmi K.

Titre : Integrated rain water and nitrogen management for dryland maize under different rainfall situations

Auteur : Venkata lakshmi K.

Université de soutenance : Tamil Nadu Agricultural University

Grade : Doctor of Philosophy (PhD) in Agronomy 2004

Résumé partiel
Field experiments were conducted at Tamil Nadu Agricultural University, Farm, Coimbatore, during North East Monsoon season of 2002 and 2003 to develop economically viable integrated rainwater and nitrogen management practice for dryland maize under different rainfall situations. The field experiments were laid out in a split-split plot design with three replications during both the years in medium black soil. Supplemental irrigation practices viz., dryland crop (I0) without receiving any supplemental irrigation, one supplemental irrigation (I1) and two supplemental irrigations (I2) through runoff recycling at moisture stress period during critical stage of the crop growth were assigned to main plots. The intercropping systems viz., sole maize (C0), maize + sunnhemp (C1) and maize + cowpea (C2) were allotted to sub plots and N levels viz., 0, 20 and 40 kg ha-1 were allotted to sub-sub plots. Observations on water collected and water losses in the farm pond, growth parameters, yield components and yield were recorded along with nutrient uptake. The economic parameters were also estimated to assess the performance of treatments.The total runoff water collected in the farm pond was 341 and 329 m3 , in which total loss accounted as 242.8 and 245.9 m3 during 2002 and 2003 respectively 80 m3 of stored water was utilized for giving two supplemental irrigations (40 m3 water needed for each irrigation). In the present investigation, rainfall during the cropping period was 331 mm in 17 days with poor distribution and early cessation resulting in lower grain yield during 2002 and 315.8 mm rainfall received in 18 rainy days with comparatively better distribution resulting in higher yield during 2003

Présentation et version intégrale (Shodhganga)

Page publiée le 23 avril 2021