KewalanandTiwari, Sapana2019-01-222019-01-222018-05http://krishikosh.egranth.ac.in/handle/1/5810092039A field experiment was conducted at the Sorghum Agronomy Block of Instructional Dairy farm, Nagla, Govindh Ballabh Pant University of Agriculture and Technology, Pantnagar (U. S. Nagar), Uttarakhand (India) during 2016-17. The experiment was laid out in Randomized Block Design. Treatments consisted of sole ryegrass, oat, barley and berseem, ryegrass + berseem (1:1), ryegrass + berseem (2:2), oat + berseem (1:1), oat + berseem (2:2), barley + berseem (1:1), barley + berseem (2:2) were tested in four replications. The system green fodder yield of sole oat was significantly higher than remaining treatments at first and second cuttings while at third cutting ryegrass + berseem (1:1) out yielded over remaining treatments. Number of tillers, system dry fodder yield, dry matter content, crude protein yield, digestible dry matter yield, total digestible nutrient, relative feed value, green fodder productivity, dry fodder productivity, digestible dry matter productivity and crude protein productivity was highest due to ryegrass + berseem intercropping system. Highest acid detergent fibre content was found in the fodder of sole barley, neutral detergent fibre content was highest in sole oat fodder. Nitrogen content, crude protein content and cell content was highest in sole berseem fodder. NDF was positively associated with green fodder yield, dry fodder yield and digestible dry matter yield but significantly negative with crude protein yield. ADF was negatively correlated with all the yields. There existed negative association between dry matter digestibility and green fodder yield but positive with other yields. Biogas production was highest from sole oat fodder followed by oat + berseem, The time taken for complete digestion was highest for cowdung substrate and least for berseem. Heat from biomass combustion was highest for ryegrass + berseem (1:1) fodder. On the basis of present investigation it can be concluded that ryegrass + berseem intercropping system is best for quality and quantity fodder production while oat alone or oat + berseem planting pattern was best for biogas productionennullThesis