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 |
Maize is one of the most important cereals of the world with its average yield of 27.8 q/ha. Maize ranks first among the cereals and is followed by rice, wheat and millets with average grain yield of 22.5, 16.3 and 6.6 q/ha, in India respectively. In Indian condition especially soil and climate, harvest index of most of varieties of maize ranges between 28 to 50% where as in some part of the world which are known for maize production, it ranges from 50-70% in USA. An experiment was conducted at Department of Agronomy, SHUATS, Naini, Prayagraj (Allahabad), U.P. in 2019-20. The soil of the experimental plots was sandy loam with low carbon contents of 0.35%, medium in available nitrogen and phosphorus i.e. 230 kg and 20 kg/ha and low in potassium contents i.e. 189 kg/ha with 6.7 PH. Prayagraj has subtropical and semi- arid climatic conditions with both extremes of temperature i.e. winter and summer. Minimum temperature during January may dip to 9-10 0c minimum and maximum to 23-24 0c whereas during May it reaches to 41-42 0c. In our present study, there were 12 treatments in 3 replications i.e 80 kg,100 kg and120kg nitrogen /ha with three PGR, NAA @40 ppm, Mepiquat Chloride @200 ppm and Putrescine @ 50 ppm. It was recorded that treatment 10 (120 kg nitrogen with 40ppm NAA) has resulted into maximum yield (5015.33 kg/ha with maximum stover yield (9162.07)kg/ha which resulted into harvest index of 35.37%, however, HI closely ranged between 35.37 to 36.27 % in all the 12 treatments. Thus, it may be concluded that under similar soil and climatic, managemental conditions in particular geographic conditions, effect of varying levels of nitrogen and use of different Plant Growth Regulators (PGR) resulted in significant variations in grain yield and total biological yield of maize but least effect on harvest index (HI).
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