Journal of FARM SCIENCES, Vol 25, No 1 (2012)

Font Size:  Small  Medium  Large

Effect of irrigation schedule and planting geometry on growth and yield of stevia (Stevia rebaudiana Bertoni.)

Y.R. Aladakatti, Y.B. Palled, M.B. Chetti, S.I. Halikatti, S.C. Alagundagi, P.L. Patil, V.C. Patil, A.D. Janawade

Abstract


A field experiment was conducted  in medium black, clayey soil under irrigated conditions to assess the response of stevia to irrigation schedules and planting geometry. Highest dry leaf yield of stevia (cumulative of five cuttings) was obtained with irrigation scheduled at 1.2 IW/CPE (10.54 t ha-1) which was on par with irrigation scheduled at 1.0 IW/CPE (10.32 t ha-1) and significantly lower dry leaf yield was with irrigation scheduled at 0.8 IW/CPE (9.36 t ha-1). Planting geometry of 30 cm x 20 cm recorded the highest cumulative total dry leaf yield (11.12 t ha-1) which was comparable with the dry leaf yield obtained with the planting geometry of 30 cm x 30 cm (10.89 t ha-1). Significantly lower dry leaf yield was recorded with planting geometry of 45 cm x 30 cm (8.73 t ha-1). Interaction effects of irrigation schedules and planting geometry on dry leaf yield of stevia were not significant. Consumptive use of water was highest with irrigation scheduled at 1.2 IW/CPE (2373.2 mm) closely followed by 1.0 IW/CPE  (1903.8 mm). The study revealed that irrigation schedule at 1.0 IW/CPE i.e., irrigation at 60 mm cumulative pan evaporation (CPE) with  planting geometry of 30 cm x 30 cm (1,11,111 plants ha-1)  was found optimum for higher stevia dry leaf yield and higher water use efficiency. Based on the average daily evaporation the irrigation interval of 9-10 days during kharif, 5-6 days during summer and 7-8 days during rabi season can be recommended in similar soil and agro climatic conditions.

Full Text: PDF