Influence of foliar application of boron and TIBA on photosynthetic parameters visa- vis productivity of sunflower (Helianthus annuus L.) under variable sowing dates

Authors

  • BUTA SINGH DHILLON Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana-141 004
  • P. K. SHARMA Department of Agronomy, Punjab Agricultural University, Ludhiana-141 004

DOI:

https://doi.org/10.54386/jam.v20i1.496

Keywords:

Chlorophylls,, dry matter partitioning, Helianthus annuus, PAR

Abstract

Field experiments were conducted during spring 2014 and 2015 at Punjab Agricultural University, Ludhiana, to study the effect of staggered sowing on photosynthetic parameters and the productivity of sunflower (Helianthus annuus L.) in relation to foliar application of boron (B) and TIBA (Tri iodo benzoic acid-TIBA). The experiment was laid out in split plot design with three sowing dates (January 20, February 10 and March2) in main plots and eight foliar spray treatments (Control, water spray, B @ 110, 220, 440 ppm, TIBA @ 100, 200 and 400 ppm) in sub plots replicated thrice. The results indicated that delay in sowing caused significant reduction in biological and seed yield of sunflower probably due to significant reduction in photosynthetic parameters coupled with reduction in crop duration from 119 to 92 days. Foliar application of boron and TIBA improved the dry matter accumulation by leaf and seed as well as total but dry matter accumulation by stem did not vary at 90 DAS. Marked improvement in photosynthetic parameters coupled with better growth indices due to TIBA- 100, 200 and 400 ppm and boron 220 and 440 ppm increased crop productivity over control and water spray by way of improved DM partitioning. Correlation studies indicated significant positive correlation of seed yield with PAR, chlorophyll content and stomatal conductance at 90 DAS, emphasizing the importance of higher growth and photosynthetic
rate during reproductive period for best yield accrual from sunflower. 

Downloads

Published

01-03-2018

How to Cite

BUTA SINGH DHILLON, & P. K. SHARMA. (2018). Influence of foliar application of boron and TIBA on photosynthetic parameters visa- vis productivity of sunflower (Helianthus annuus L.) under variable sowing dates. Journal of Agrometeorology, 20(1), 16–21. https://doi.org/10.54386/jam.v20i1.496

Issue

Vol. 20 No. 1 (2018): March

Section

Research Paper

License

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

This is a human-readable summary of (and not a substitute for) the license. Disclaimer.

You are free to:

Share — copy and redistribute the material in any medium or format

Adapt — remix, transform, and build upon the material

The licensor cannot revoke these freedoms as long as you follow the license terms.

    Under the following terms:

    Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

    NonCommercial — You may not use the material for commercial purposes.

    ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.

    No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

    Notices:

    You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation.

    No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.