Effects of different harvesting intensities and phenological stages on soluble carbohydrate reserve variabilities of Halocnemum strobilaceum and Halostachys caspica (Case study: Rangelands of Gomishan city, North-Western of Golestan Province)
Subject Areas : GeneticMajid Sharifi-Rad 1 , Gholamali Heshmati 2 , Mohammad Bagher Bagherieh-Najjar 3
1 - Department of Rangeland Science, Agricultural
Sciences and Natural Resources University of Gorgan, Iran
2 - Department of Rangeland Science, Agricultural
Sciences and Natural Resources University of Gorgan, Iran
3 - Department of Biology, Golestan University, Gorgan, Iran
Keywords: Rangeland management, Halostachys caspica, Harvesting intensity, Halocnemum Strobilaceum, Phenological stages, Soluble carbohydrate,
Abstract :
This study examines the variability in soluble carbohydrate reserves of Halocnemum strobilaceum and Halostachys caspica at various harvesting intensities (no harvesting (as control), 25%, 50%, and 75%) and different growth stages (vegetative, flowering, and seeding) in the aerial (stems) and underground (root) parts. The results showed that different harvesting intensities had significant effects on soluble carbohydrate reserves in the two species (P≤0.05). In both species no harvesting (control) had maximum soluble carbohydrate reserves and with increasing of harvesting intensity, the soluble carbohydrate reserves significantly decreased so, due to the negative effects of 50% and 75% harvesting levels on soluble carbohydrate reserves, more than 25% harvesting level must be avoided as it damages the soluble carbohydrate reserves of the species. Also the results showed that plant growth stage and plant part type had significant effects on soluble carbohydrate reserves in the two species. In terms of the total amount of soluble carbohydrate (stem+ root), there was significant difference between two species. With the growth progresses, the amount of soluble carbohydrates significantly increased in both species. Therefore, we can consider the seeding stage as the best time for grazing in the studied species.
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