Vol. 11, Issue 6 (2022)

Author(s):
Sudarshan Chicham, SP Singh, DS Sasode, Ekta Joshi, SK Sharma, MJ Sadawarti and PK Ausari

Abstract:
A field experiment was conducted during the year 2018-19 and 2019-20 at ICAR – CPRI-RS, Gwalior (M.P) to Evaluation of micro irrigation for improving productivity and water use efficiency in potato cv. Kufri Jyoti. The investigation comprised of sixteen treatments and each treatment was repeated thrice in split plot design. The treatments comprised of irrigation systems- S₁: drip irrigation system, S₂: sprinkler irrigation system; irrigation levels- L₁: deficit irrigation, L₂: sufficient irrigation; mulching- M₁: no mulch, M₂­: paddy straw mulch @ 5 t/ha, M₃: polythene sheet mulch (25µ thickness), M₄: spray of chemical formulation at TIS & Bulking stage (40 & 65 DAP) and their combination. The results show that plant population per plot found higher with treatment S₁L₂M₃ at 30 DAP (88.17) and at maturity (90.50); number of compound leaves/plant found higher with treatment S₁L₂M₃ at 30 DAP (39.70), at 60 DAP (53.09) and at maturity (54.90); number of tubers/plant found maximum with treatment S₂L₂M₃ at 30 DAP (2.90), at 60 DAP (12.41) and at maturity (13.04); higher root shoot ratio found higher in treatment S₁L₂M₂ at 30 DAP (0.334), at 60 DAP (0.293) and at maturity (0.297) treatment S₁L₁M₁ recorded maximum root shoot ratio; chlorophyll content found higher in treatment S₁L₂M₃ at 30 DAP (51.78), at 60 DAP (45.67) and at maturity (39.56); Fresh haulm yield (26.047 t/ha) found higher with S₂L₂M₂; Fresh tuber yield (38.415 t/ha) found higher with S₂L₂M₂; starch content of potato tuber (13.8%) found higher in treatment S₁L₁M₂; water content of potato tuber (81.84%) found higher in treatment S₁L₁M₁; N (91.074 kg/ha), P (19.891 kg/ha), K (140.855 kg/ha) uptake by potato tuber is found higher with treatment S₂L₂M₂; N (66.258 kg/ha), P (15.956 kg/ha), K (68.883 kg/ha) uptake by potato haulm is found higher with treatment S₂L₂M₂; significantly higher gross return (Rs. 1,92,075/-), net return (Rs. 1,13,056/-), B:C ratio (2.43) and harvest index (60.23%). While, minimum gross return (Rs. 1,11,045/-), net return (Rs. 33,026/-), B:C ratio (1.42) and harvest index (53.07%) recorded with treatment S₂L₁M₁.