INFLUENCE OF NITROGEN AND PHOSPHORUS LEVELS ONPHYSIOLOGICAL PARAMETERS AND ECONOMICS OFSORGHUM IN EUCALYPTUS TERETICORNIS BASEDAGRISILVICULTURE SYSTEM
K. S. AHLAWAT, BIMLENDRA KUMARI1, M. K. SINGH2, VIRENDER HOODA3,ASHOK DESHWAL4 AND HANS RAJ5
Krishi Vigyan Kendra
Kurukshetra-136 118 (Haryana), India
A field experiment was conducted on sandy loam soil to study the response of various fertilizer
levels on Sorghum bicolor in 5-6 year old Eucalyptus tereticornis Sm. based agrisilviculture system. The crop growth rate increased significantly with increase in fertilizer levels up to 125 per cent of recommended dose of fertilizer at all crop growth stages in both the systems. On the basis of average of two crop seasons 36.8 and 36.7 per cent less photosynthesis, 47.5 and 46.3 per cent less transpiration, and 23.0 and 23.1 per cent less stomatal conductance at 40 days after sowing and at harvest, respectively, were recorded under eucalyptus sown sorghum than sole sorghum. Higher returns and cost/benefit ratio were recorded in agrisilviculture system than sole sorghum.
Key words : Eucalyptus tereticornis, Sorghum bicolor, stomatal conductance, photosynthesis,