In order to study phenology, some growth indices and qualitative and quantitative characteristics of potato cultivars (Savalan, Sante and Cozima) an experiment was conducted for one ...
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In order to study phenology, some growth indices and qualitative and quantitative characteristics of potato cultivars (Savalan, Sante and Cozima) an experiment was conducted for one year (2010-2011) at Behbahan Agriculture Research Station. The experimental design was randomized complete block design with three treatments and three replications. Tubers were planted at mid January 2010 and were harvested at mid May 2011. The results indicated that the yield of potato in Khouzestan province is lower than that in temperate regions due to the long sprout development stage and high temperature during the tuber bulking stage. The duration of the vegetative stage was short and the maturation stage was not observed. The haulm and tuber growth rate increased during the early season while reached a maximum value, following decline in the late season. The tuber and crop growth rate of Savalan cultivar (19.4 and 21.72 g m-2 day-1 respectively) was higher than other cultivars. Therefore, this cultivar produced the highest yield of tuber dry weight (4.20 t ha-1). The maximum of relative growth rate (0.598 g g-1 day-1) and maximum of tuber growth rate (0.320 g g-1 day-1) belong to Savalan and Cozima cultivars respectively. Cozima cultivar produced the highest total and marketable yield (19.91 and 18.38 t ha-1 respectively). In regard to, total and marketable yield the difference between Cozima and Savalan cultivars was not significant. Savalan cultivar produced the highest tuber dry weight percentage (22.38)
An experiment was conducted to determine bulbing time and growth analysis of Safid Behbehan, Gholi Gheseh Zanjan, Kamarei Khomain, Dorcheh Esfahan and Safid Ghom Landraces at Seed and ...
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An experiment was conducted to determine bulbing time and growth analysis of Safid Behbehan, Gholi Gheseh Zanjan, Kamarei Khomain, Dorcheh Esfahan and Safid Ghom Landraces at Seed and Plant Improvement Institute in Karaj at 2007 based on randomized complete block design with three replications. Seeds were sown in nursery in early February and seedlings were transplanted in early May. Bulbing occurred in landraces from a photoperiod of 14 h and 21min (11 June) to 14 h and 32 min (7 July). The results of growth analysis showed a slow growth (about 75 days after emergence) and a rapid growth after that. Leaf blade growth continued after bulbing in all landraces, exception in Safid Qom landrace, that leaf blade growth stopped approximaitly simultaneously with bulbing. Also mentioned landrace had the highest bulb growth rate, crop growth rate and leaf area index . A high significant positive correlation ( r =0. 69 ) was found between relative growth rate and net assimilation rate.Safid Behbahan landrace produced the minimum yield. According to results, we recommended Safid Qom landrace for planting at Karaj region.
