Ratoon Rice Response to Diff erent Fertilizer Doses in Irrigated Condition

Th e response of diff erent fertilizer doses was studied on the ratoon crop as well as main crop. Th e diff erent fertilizer doses under the study were F1 (N=90, P2O5 = 45, K2O=50, S=13, Zn = 4: in kg ha-1), F2 (N=105, P2O5 = 55, K2O=60, S=13, Zn = 4: in kg ha-1), F3 (N=120, P2O5 = 65, K2O=70, S=13, Zn = 4: in kg ha-1), F 4(N =135, P2O5 =75, K2O=80, S=13, Zn=4: in kg ha-1) and F5 (N=150, P2O5 = 85, K2O = 90, S=13, Zn = 4: in kg ha-1). In the main crop, the highest grain and biological yields were produced by F3 dose. Th e highest straw yield was produced by F4 dose. Th e lowest grain yield and the lowest biological yield were produced by F1 dose and the lowest straw yield was produced by F2 dose. Th e highest crop duration was found using F1 dose and the shortest crop duration was found using F3 doses. In the ratoon crop, the highest grain yield, straw yield and biological yield was produced by F5 dose whereas the lowest grain yield, straw yield and biological yield was achieved with F1 dose. Th e longest crop duration was observed using F2 dose and the shortest crop duration was recorded using F5 dose.