International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 2
First page : (173) Last page : (179)
Article doi: http://dx.doi.org/10.18782/2320-7051.2580
Response of Irrigation Frequency and Nitrogen Levels on Relative Water Content, Canopy Temperature, Water Potential and Chlorophyll Content of Late Sown Wheat
Mukesh Kumar*, R.K. Pannu, Bhagat Singh and A.K. Dhaka
Department of Agronomy, CCS Haryana Agricultural University, Hisar-125004, India
*Corresponding Author E-mail: mukeshkumarkainwal@gmail.com
Received: 11.02.2017 | Revised: 23.02.2017 | Accepted: 25.02.2017
ABSTRACT
To study the response of irrigation frequency and nitrogen levels on relative water content, canopy temperature, water potential and chlorophyll content of late sown wheat, an experiment was carried out at the CCS Haryana Agricultural University, Hisar during Rabi seasons of 2010-11 and 2011-12. The experiment consisted of three irrigation frequencies viz. one irrigation at CRI, two irrigations at CRI and heading and four irrigations at CRI, late tillering, heading and milking stage in main plots and five nitrogen levels viz. control (0 kg N ha-1), 50 kg N ha-1, 100 kg N ha-1, recommended dose of nitrogen (150 kg N ha-1) and 200 kg N ha-1 in sub-plots was laid out in strip plot design with four replications. Results of experiment revealed that among the plant water relation parameters recorded at anthesis, the relative water content (RWC) and leaf water potential (LWP) at the level of two and four irrigations was significantly higher than one irrigation. The higher leaf water potential and relative water contents were associated with higher photosynthetic rate. However, canopy temperature (CT) and canopy temperature depression (CTD) at the level one irrigation was significantly higher than two and four irrigations. The nitrogen applied at the rate of 200 kg ha-1 maintained significantly higher LWP than control (0 kg N ha-1). Chlorophyll index recorded on flag leaf decreased consistently with increase in plant age after anthesis. Chlorophyll index increased significantly with increased levels of irrigations at anthesis. Chlorophyll index was significantly higher upto 150 kg N ha-1 at 7, 14, 21 and 28 days after anthesis during both the years. The increase irrigation number from one to two, two to four and one to four irrigations increased the grain yield of wheat by about 25.1, 20.4 and 50.6 % during 2010-11 and 21.0, 21.9 and 47.5 % during 2011-12, respectively. Grain yield increased significantly upto 150 kg N ha-1.
Key words: irrigation frequency, nitrogen levels, relative water content, water potential, late sown wheat
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Kumar, M., Pannu, R.K., Singh, B. and Dhaka, A.K., Response of Irrigation Frequency and Nitrogen Levels on Relative Water Content, Canopy Temperature, Water Potential and Chlorophyll Content of Late Sown Wheat, Int. J. Pure App. Biosci.5(2): 173-179 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2580
