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Subject: Agronomy × Author: CHAHAL, ARVIND × End date: 2019 × Start date: 2016 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    STUDIES ON THE EFFECT OF TREE SHADE AND NITROGEN LEVELS ON NAPIER BAJRA HYBRID (Pennisetum purpureum × Pennisetum americanum)
    (CSK Himachal Pradesh Krishi Vishavavidyalaya, Palampur, 2016) CHAHAL, ARVIND; Kumar, Naveen
    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.