vahid karimian; Mohsen Farzin
Abstract
In this research, the nutrient value of Zygophyllum eurypterum, Salsola orientalis, and Sanguisorba minor during different growing periods in the winter rangelands of Gachsaran County was considered. For this purpose, sampling was done randomly and with 4 repetitions from the species in different periods ...
Read More
In this research, the nutrient value of Zygophyllum eurypterum, Salsola orientalis, and Sanguisorba minor during different growing periods in the winter rangelands of Gachsaran County was considered. For this purpose, sampling was done randomly and with 4 repetitions from the species in different periods of growth. To determine the quality, crude protein percentage (CP), acid detergent insoluble fiber (ADF), dry matter digestibility (DMD) and metabolizable energy (ME) were evaluated. The results showed that the quality indices in the studied species have significant differences (p<0.05). The highest values of crude protein percentage, dry matter digestibility percentage and metabolic energy (MJ/kg) are 16.91, 60.88 and 8.35, respectively, was observed in S. minor and the lowest values of the indices 7.39, 49.05 and 6.33, respectively, were detected in S. orientalis. Also, the highest amount of ADF was obtained in S. orientalis (45.66%) and the lowest in S. minor (36.16%). The nutrient value of the plants in different growth periods has significant differences (p<0.05). In the growth period, the highest percentage of crude protein (20.87) belongs to the Z. eurypterum, the highest percentage of digestibility (65.92) and the amount of metabolic energy (9.2 Mj/kg) was belonged to the S. minor and the lowest percentage of crude protein (8.65), dry matter digestibility percentage (57.34), and metabolic energy (7.74 Mj/kg) was belonged to the S. orientalis. The highest (36.25%) and the lowest percentage of ADF (31.50%) at this stage belong to S. orientalis and S. minor. In the flowering period, the highest amount of crude protein percentage (17.50), dry matter digestibility percentage (62.50) and metabolic energy (8.62) belong to the S. minor.
Shafagh Rastgar; Ali Darijani; Hossein Barani; Mohammad Ghorbani; Jamshid Ghorbani; Vahed Bordi Sheikh
Abstract
Forage is the main product of rangelands. So, determining its economic value as one of the main important nonmonetary functions can help managers to improve planning and optimal utilization management of rangelands. The main purpose of this study is to estimate the economic valuation of the forage of ...
Read More
Forage is the main product of rangelands. So, determining its economic value as one of the main important nonmonetary functions can help managers to improve planning and optimal utilization management of rangelands. The main purpose of this study is to estimate the economic valuation of the forage of summer rangelands in Nour-roud watershed basin in Mazandaran province. Consequently, total forage production estimated by using double method in 12 unit works. According to the heterogeneity of range forages in terms of economic and lacking organized market for transaction, have been used barely and using Replacement Cost Method (RCM). In order to homogenize the value of all forage plants, Total Digestible Nutrients (TDN) of each plant multiplied to its forage product to calculate the nutrition value of forage per rangeland unit work. According to the specified T.D.N of barely, the equivalent weight of barely, identified for each range/ha in different price scenarios (guaranteed, international and farm prices), total value of forage production calculated based on barely price. Results showed that, Forage yield equivalent to barely was estimated 276.5 kg per ha of 89826.7 usable summer rangelands. Its economic value was equivalent to 713280 Rials per hectare. Also, its average annual economic value by 3 price senarios estimated, 64.6 Milyard Rials. This amount of economic value was equal to 718900 Rials per hectare of Nour-rud rangelands. Also, the estimated forage values are only 25 percentage of total economic value of rangeland ecosystem that has been exploited as natural bequest without any investment.
