2011, Issue-3 & 4, Volume 3

GROWTH PATTERN AND BIOMASS YIELD OF STEVIA REBAUDIANA (BERT.) GROWN UNDER POLYHOUSE CONDITIONS IN RELATION TO CLIMATE CHANGE.

Pradeep Kumar Jena1, Ashwani Kumar Goyal2 and Arvind Bhardwaj3

1Deptt.of Botany, Govt. P.G. College, Noida1

2Km. Mayawati Rajakiya Mahila Snatkottar Mahavidyalaya, Badal Pur

3Natural Drugs & Botanicals, Ghaziabad3

Corresponding author email: pradeepherbs@gmail.com

Abstract: Climate change affects the earth’s temperature, precipitation, hydrological cycles, frequency and intensity of heat waves and many extreme events, which has a great impact on agricultural production. On the wake of the climatic change, polyhouse farming is the only way to protect crops and manage a better yield than in normal climatic condition. It protects crops from wind, rain, radiation, and precipitation, etc again it facilitates the farmers not to depend on the monsoon for the cultivation but allow scheduling of the production according to the market needs.

A polyhouse experiment was conducted during winter season of 2011 at Government P.G College, Noida to study the effect of polyhouse condition on the growth pattern and biomass yield in Stevia rebaundiana (Bert.). The experiment was laid out in two different environmental conditions as Polyhouse environment and the other one is Control (open field) environment. Forty five days old Stevia seedlings are planted with row spacing 40-45 cm and between each plant 25 cm in well prepared field of both the environments in the month of january-2011 and the crop was established successfully. The studies on growth pattern, leaf area and biomass yield were made after an interval of 15 days from the date of transplantation till four month stage. In the present study it is revealed that polyhouse environment trigger the production of plant material especially leaf numbers, leaf fresh weight, plant height and total biomass considerably over open climatic condition, where the growth of the plant is ceased in the January as crop was frost-susceptible.

Keywords: Climate change, market needs, polyhouse, protect crops, Stevia rebaudiana

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