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Asian Journal of Crop Science
  Year: 2009 | Volume: 1 | Issue: 1 | Page No.: 49-57
DOI: 10.3923/ajcs.2009.49.57
Some Physiological Parameters and Sugar Concentration Changing of Sugar Beet (Beta vulgaris L.) Under Controlled Climatical Conditions
A. Yadollahi and Z. Shojaei Asadiyeh

Abstract:
This research was conducted to investigate the impact of night temperature and light intensity on growth indices and sugar content of sugar beet (Triploid Multigerm Iran-Karaj 1 variety, type N-E) in a Mediterranean climate (North West of Iran) at Moghan Agro-industry and Livestock Co. from April 2001 to February 2002. Its lower sugar contents were reported than those normally grown in other sugar beet growing regions. Sugar beet crops were cultivated with full automatic controlled environment (night temperature and light intensity) facilities in an experimental farm. Data were collected 80 days after planting using a completely randomized block design with four replications using 7 treatments. The treatments consisted of night temperature 15°C (T1) and 10°C (T2), increase of light intensity (L), night temperature 15°C and increase of light intensity (T1L), night temperature 10°C and increase of light intensity (T2L), a greenhouse control (C1) and a control without greenhouse (C2). The total dry matter and leaves area of sugar beet were measured to calculate the growth indices including shoot crop growth rate, total crop growth rate, leaf area index and net assimilation rate from 20 days after planting. After 140 days, some samples were taken from the roots of sugar beet and pulp in order to determine the sugar content. This sampling procedure was carried out every 10 days up to 210 days after planting. Model development showed that the best equation, Y = aebx (Y is the sugar content, e, the napery logarithm, a and b are coefficient and x is one of the growth indices), was obtained from data regression. The growth indices were negatively correlated well (p<0.001) with sugar content. Hence, the low sugar content could be due to the warm nights and slight light intensity during days.
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How to cite this article:

A. Yadollahi and Z. Shojaei Asadiyeh, 2009. Some Physiological Parameters and Sugar Concentration Changing of Sugar Beet (Beta vulgaris L.) Under Controlled Climatical Conditions. Asian Journal of Crop Science, 1: 49-57.

DOI: 10.3923/ajcs.2009.49.57

URL: https://scialert.net/abstract/?doi=ajcs.2009.49.57

 
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