SATPAL, B. GANGAIAH, N. KUMAR, S. DEVI, N. KHAROR, K. K. BHARDWAJ, P. KUMARI, B. L. SHARMA, NEELAM AND S. KUMAR
Forage Section, Department of Genetics & Plant Breeding, 4Department of Botany & Plant Physiology, 6Department of Soil Science and Department of Agronomy, CCS Haryana Agricultural University,
Hisar-125 004 (Haryana), India
ICAR – Indian Institute of Millets Research, Hyderabad-500 030 (Telangana), India
*(e-mail : firstname.lastname@example.org)
(Received : 10 July 2021; Accepted : 10 September 2021)
Field experiment was made to assess the impact four graded levels of recommended fertilizer doses (RDF 0, 50, 100 and 150% with 75.0-13.2-24.9 kg N-P-K/ha as RDF) on fodder productivity, quality and economics of six single cut forage sorghum [Sorghum bicolor (L.) Moench] genotypes (SPV 2584, SPV 2587, SPV 2593, CSV 21F, CSV 30F and SH 1519) at Hisar (Haryana), India during kharif season of 2020 using Split plot design with two replications. Results revealed that ‘SPV 2584’ ‘SPV 2593’ and ‘SH 1519’ with identical green and dry fodder yields i.e. 51.74 and 12.75 t/ha (mean) have excelled both checks CSV 21F and CSV 30F by 8 & 8 and 11 & 13 per cent, respectively and are promising from crude protein, digestible dry matter yield and net income wise also. Check cultivar “CSV 30F’ that fared very badly for both fodder quality and net income generation point of view; however, was most efficient from dry fodder yields/ kg N-P-K uptake. CSV 21F has lowest HCN content (54 µg/g) while SPV 2584, the highest (89.8 µg/g). High fodder producing genotypes (SPV 2584, SPV 2593 and SH 1519) are more depletive of soil nutrients. Among RDF levels, significant improvement was seen in leaf area index values only with 150% RDF application over RDF and thus RDF was best for realizing the fodder yield and also for economics. Fertilizers (RDF) have contributed to 20.2, 40.3 and 49.9% green, dry fodder yield and net income enhancements at the test site as compared to 0% RDF i.e. unfertilized control (42.26, 8.26 t/ha and 19,528). Inherent soil fertility (0% RDF) has contributed to 105.3-9.94-92.0 kg/ha N-P-K uptake of forage sorghum crop producing highest dry fodder/kg NPK uptake (78.4-831.0-89.8 kg fodder / kg N-P-K) and uptake got 2.08-2.88-1.89 times more with RDF use. Application of 150% RDF has not only reduced the soil NP uptake over RDF but also produced highest dry fodder/kg NPK application (61.8-458.0-78.1 kg fodder/kg N-P-K). HCN content increased from 60 to 96 µg/g as RDF increased from 0 to 150% RDF. It is concluded that single cut forage sorghum genotypes SPV 2584, SPV 2593 and SH 1519 are promising and application of 100% RDF (75.0-13.2-24.9 kg/ha N-P-K) was recommended for higher fodder yield, quality and income.
Key words:Forage sorghum, single-cut, genotypes, fertilizer levels, fodder yield, HCN, crude protein and IVDMD