Effect of spacing and fertilizers doses on HCN content of multicut forage sorghum (SPV 2242) under irrigated condition

A field experiment was conducted to find out the effect of spacing and fertilizer doses on HCN content of multi-cut forage sorghum at TNAU, Coimbatore during Kharif, 2016. The experiment was laid out in split plot design replicated thrice using SPV2242 as the test variety. The treatments consisted of four different spacings (30 x 10 cm, 30 x 15 cm, 30 x 20 cm and 30 x 25 cm) along with three fertilizer doses (75% RDF, 100% RDF and 125% RDF). In addition, recommended application of FYM @ 25 t/ha was followed. The lower HCN content was recorded in 30 x 10 cm spacing (83.7, 79.6 and 77.4 ppm at first, second and third cut, respectively). With regard to fertilizers, application of 75% RDF recordedthe lower HCN content (110.8, 100.2 and 91.7 ppm) at first, second and third cut of multicut forage sorghum. The results revealed that increased plant populationwith lowest rate of fertilizer application decreases the HCN content of multicut forage sorghum and it improves the fodder quality.