STUDIES ON THE EFFECT OF TREE SHADE AND NITROGEN LEVELS ON NAPIER BAJRA HYBRID (Pennisetum purpureum × Pennisetum americanum)
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Date
2016
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CSK Himachal Pradesh Krishi Vishavavidyalaya, Palampur
Abstract
A long term field experiment entitled “Studies on the effect of tree shade and
nitrogen levels on Napier bajra hybrid (Pennisetum purpureum × Pennisetum
americanum)” at Research Farm of Fodder Section, Department of Crop
Improvement, CSK, Himachal Pradesh Krishi Vishvavidyalaya, Palampur under
degraded wasteland conditions was under study since Kharif 2012 and was maintained
during Kharif 2015 to have observation for the present study. Soil of the experimental
site was silty clay loam in texture, acidic in reaction, medium in organic carbon, low in
available nitrogen, medium in available phosphorus and available potassium. The
experiment was laid out in randomized block design with three replications, consisting
of ten treatments having ten combinations of two shade conditions viz. no shade and
Eucalyptus citriodora tree shade and five levels of nitrogen i.e. no nitrogen, 50, 75, 100
and 125 per cent of recommended nitrogen. Significantly better plant height, shoots
per tussock, shoots per square meter and leaf stem ratio of Napier bajra hybrid was
observed under no shade i.e. open conditions than tree shade conditions. Application of
125 per cent of recommended nitrogen resulted in significantly better plant height,
shoots per tussock and shoots per square meter. However, response of nitrogen on leaf
stem ratio was significant up to 100 per cent of recommended dose. Significantly
highest total green fodder (373.57 q ha-1), dry fodder (93.75 q ha-1) and crude protein
yields (10.26 q ha-1) and net returns (₹ 41805 ha-1) were produced with the application
of 125 per cent of recommended nitrogen. Napier bajra hybrid produced significantly
higher total green fodder (466.83 q ha-1), dry fodder (118.22 q ha-1) and crude protein
(13.10 q ha-1) yields vis-a-vis net returns (₹ 54208 ha-1) with the application of 125 per
cent of recommended nitrogen under no shade. Benefit cost ratio increased
significantly and consistently with every increase in nitrogen levels up to 100 per cent
of recommended nitrogen. Crude protein, acid detergent fibre, neutral detergent fibre,
nitrate, oxalate and calcium contents in Napier bajra hybrid forage were significantly
higher under tree shade conditions. The higher value of available soil nitrogen was
recorded in open conditions, whereas, organic carbon and available soil phosphorous
and potassium were higher under tree shade.
Description
M.Sc. Thesis
Keywords
<h1>You have exceeded your usage quota. Please contact gshukla [at] iitk.ac.in </h1>, Bajra, Agronomy