Investigation of correlation between germination and growth components in cotton under waterlogging and temperature treatments

摘要

Waterlogging is one of the problems in cotton fields which affects germination and growth of cotton . Following rainfall is declined soil and environment temperature and can cause considerable damages to the crop. To investigate the correlation between components of the germination and growth in cotton under different levels of waterlogging and temperature, an experiment wa s carried out in laboratory and green house at Gorgan University of Agricultural Sciences and Natural Resources in Iran during the 2010 - 2011 cropping seasons. Experimental treatments were the waterlogging period duration (0, 24, 48 and 96 h) and temperatur e (16, 20 and 25 .C) . The results showed that increasing the waterlogging period duration from 0 to 96 h and decreasing the temperature from 25 to 16 .C led to decrease in germination rate, seedling dry weight and normal seedling percentage in cotton. Also , the results showed with increasing the waterlogging period duration and decreasing the temperature decreased leaf area, plant height and dry weight, chlorophyll and Fv/Fm ratio. However, the interaction of waterlogging period duration and temperature wa s significant only on leaf area, plant height and dry weight. Also the results showed that there was high correlation between germination and growth components in cotton, so that these results can be used for evaluation of germination and growth of this pl ant under different waterlogging and temperature treatments.