Performance of different varieties of mint (Mentha arvensis L.) under poplar based agroforestry system
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Date
2018-06
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The present investigation entitled “performance of different varieties of mint (Mentha arvensis L.) under poplar based agroforestry system” was carried out during 2017 at Experimental Site of Agroforestry Research Centre, Patharchatta, G.B. Pant University of Agriculture and Technology, Pantnagar. The experiment was laid out in Factorial Randomized Block Design with two farming systems (open farming system and poplar based agroforestry system) and four varieties of Mentha arvensis namely CIM Saryu, CIM Kranti, Kosi and Saksham with four replications. Vegetative parameters of different varieties of Mentha arvensis such as plant height, number of branches per plant and plant spread was maximum under open farming system as compared to poplar based agroforestry system. The maximum total fresh herbage yield of 224.00 q ha-1 and 109.25 q ha-1 was recorded in variety Kosi under open farming system and polar based agroforestry system. The maximum total above ground dry matter production was 414.96 g m-2 in CIM Kranti under open farming system. Oil content of 1.21% and 1.27% was maximum in CIM Kranti at 1st and 2nd harvest under open farming system. Total oil yield of 186.19 l ha-1 was maximum under open farming system but it was 72.72 l ha-1 under poplar based agroforestry system. CIM Kranti variety yielded maximum oil of 270.38 l ha-1 under open farming system. The gross returns of ` 4,52,661.50 and net returns of ` 3,47,522.40 ha-1 was obtained from variety CIM Kranti under open farming system and ` 2,36,227.00 and ` 1,45,073.50 ha-1 respectively, from poplar based agroforestry system. The maximum B: C ratio of 3.30 and 1.59 was also estimated for CIM Kranti under open farming system and poplar based agroforestry system, respectively. Under poplar based agroforestry system, maximum evolved CO2 was 127.26 mgC in Kosi variety whereas minimum was 108.83 mgC in Saksham variety. However, under open condition, total evolved CO2 being 96.49 mgC was minimum after 30 of days incubation period.
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