National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
One field experiment was conducted in the winter season of the year 2016-2017 to determine the effects of agro-climatic factors on crop developmental rate (CDR) of grass pea (Lathyrus sativus L.). CDR of a phenological stage is simply the reciprocal of the duration of that particular stage. Grass pea (variety: ‘Prateek’) was sown on nine different dates (26th October, 2nd November, 9th November, 16th November, 23rd November, 30th November, 7th December, 14th December and 21st December). Entire crop growing period was divided into four phenological stages viz. vegetative stage, reproductive stage, pod developmental stage and maturity stage. CDR during vegetative stage showed decreasing trend while during the later three stages CDR were found to increase gradually from first date of sowing to the last date of sowing. Results showed that Growing degree day (GDD), Heliothermal units (HTU) were positively correlated with CDR. Air and soil temperatures played significant beneficial role on CDR. Regression equations were developed by using SPSS 16.0 version for prediction of CDR. Regression analysis showed that the linear equations involving morning actual vapour pressure during reproductive phase and diurnal temperature range during maturity stage which could explain 98% and 98.9% of the total variability in CDR respectively.
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