Vol. 10, Issue 5 (2021)

Author(s):
Banashri Lodh, SN Jena, RK Paikaray and JK Nayak

Abstract:
A field experiment was conducted at Central Research Station of the College of Agriculture, OUAT, Bhubaneswar, during two consecutive kharif and rabi seasons of 2017-18 and 2018-19. Maize crop was taken as rabi crop after the kharif rice to study the influence of residual nutrient provided to rice and direct effects of different weed management practices on its growth, yield attributes, yield and nutrient uptake. Among the nutrient management practices, 50% STBN + 50% VC (i.e. 50% soil test based nitrogen and 50% nitrogen was supplied through vermicompost) recorded the highest dry matter accumulation (1442 g/m²), kernel yield (6.36 t/ha), and NPK uptake by succeeding maize crop. Among the weed management practices, combined application of topramezone @25g a.i. + atrazine @ 250g a.i./ha as tank mix resulted the maximum kernel yield 7.18 t/ha. With respect to the total nutrients (NPK) uptake, treatment comprising 50%STBN + 50%VC recorded highest total nutrient uptake i.e 111.7Kg/ha nitrogen (75 Kg in kernel+36.7 Kg in stover), 40.7 Kg/ha phosphorus (30.5 Kg in kernel+10.2 Kg in stover) and 137 Kg/ha potassium (35 Kg in kernel+102 Kg in stover). Among the weed management practices, treatment comprising Topramezone @25g a.i. + Atrazine @ 250g a.i./ha as tank mix recorded highest value of nutrient uptake, 127.9 Kg/ha nitrogen, 46.2 Kg/ha phosphorus and 152 Kg/ha potassium. Weedy check recorded minimum nutrient uptake of 51.7-15.9-71 Kg/ha nitrogen phosphorus and potassium respectively.