MOHAMMAD NABI, SATPAL, NEELAM*, K. K. BHARDWAJ, NITIN BHARDWAJ, N. KHAROR, BISHAN SINGH AND SURESH KUMAR
Department of Agronomy, Department of Genetics & Plant Breeding (Forage Section), Department of Soil Science
CCS Haryana Agricultural University, Hisar-125 004 (Haryana), India
*(e-mail : email@example.com)
(Received : 01 September; Accepted : 29 September)
A field experiment was conducted at Forage Research Farm, Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar (Haryana), India during summer season of 2020 to assess the influence of organic and inorganic sources of nitrogen application on quality, yield and productivity of single-cut forage sorghum. The experiment was laid out in randomized block design with nine treatments viz. T1: Control, T2: 100% RDN (Recommended Dose of Nitrogen) through inorganic source, T3: 75% RDN through inorganic source+25% RDN through FYM, T4: 75% RDN through inorganic source+25% RDN through vermicompost, T5: 50% RDN through inorganic source +50% RDN through FYM, T6: 50% RDN through inorganic source +50% RDN through vermicompost , T7: 100% RDN through FYM, T8: 100% RDN through vermicompost, T9 : 50% RDN through FYM+50% RDN through vermicompost were replicated thrice in the experiment. Among quality parameters, maximum crude protein content (8.91%) and in-vitro dry matter digestibility (51.8%) were estimated with T2[100% RDN (Recommended Dose of Nitrogen) through inorganic source (Urea)] which were on a par with T3(75% RDN through inorganic source + 25% N through FYM) and T4 (75% RDN through inorganic source + 25% N through vermicompost) for CP and with T3, T4 and T6 for IVDMD. HCN content (anti-nutritional constituent) estimated at 30 DAS was below critical limit (200 µg/g on fresh weight basis) in all the treatments. Maximum per day productivity of green fodder, dry matter, crude protein and digestible dry matter (45640, 11980, 1070 and 6200, respectively) recorded with the application of 100% RDN through inorganic source was on a par with 75% RDN through inorganic source+25% RDN through FYM/ vermicompost. Conclusively among different nitrogen management options integrated use of inorganic and organic sources of nitrogen (75% nitrogen through urea and 25% nitrogen through vermicompost or FYM) can be a better substitute to sole application of inorganic sources (100% nitrogen through inorganic sources) to obtain the comparative results of quality parameters and yield of single cut forage sorghum.
Key words: Forage sorghum, single-cut, FYM, vermicompost, quality, HCN, crude protein and IVDMD