Seyed Ali Hoseini; Mansour Mesdaghi; Serkis Pambukhchyan
Volume 21, Issue 2 , August 2014, , Pages 189-197
Abstract
Determination of forage quality is one of the fundamental factors for suitable management. There are spatial and temporal variations in quality of rangeland species. In this study, forage quality of five important grasses of Bromus tomentellus, Poa angustifolia, Festuca ovina, Agropyron ...
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Determination of forage quality is one of the fundamental factors for suitable management. There are spatial and temporal variations in quality of rangeland species. In this study, forage quality of five important grasses of Bromus tomentellus, Poa angustifolia, Festuca ovina, Agropyron intermedium and Agropyron trichophorum were measured at three phenological stages (vegetative growth, full flowering and seed ripening) in summer rangelands of Golestan province. For this purpose, five replications were randomly selected from each phenological stage. Quality factors of crude protein, ADF, crude fiber, dry matter digestibility and metabolizable energy were measured using in vitro procedures. The results obtained from chemical analysis were analyzed in a factorial experiment at randomized complete block design with SAS software. Results showed that forage quality differed significantly for different species as well as at different phenological stages (p<0.05). Among studied species, the highest forage quality was related to Bromus tomentellus while the lowest was related to Agropyron trichophorum. The highest and the lowest forage quality were recorded for vegetative growth and seed ripening stages, respectively.
Seid ali Hoseini; Mansur Mesdaghi; Cerkis Pambokhchyan
Volume 18, Issue 4 , September 2012, , Pages 637-651
Abstract
To find an accurate and rapid method of estimating herbage standing crop, clipping and weighing, double sampling, and comparative yield methods were compared in two vegetation types of grasslands and one cushion shrubland in Sar-Aliabad summer rangelands of Golestan province. In representative stands ...
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To find an accurate and rapid method of estimating herbage standing crop, clipping and weighing, double sampling, and comparative yield methods were compared in two vegetation types of grasslands and one cushion shrubland in Sar-Aliabad summer rangelands of Golestan province. In representative stands of each vegetation type, eighty 1-m2 plots were clipped and weighed. In double sampling method, 16 plots were estimated and clipped. In comparative yield method, standard (reference) plots were used as the highest yield belonged to the reference plot 5 and the lowest yield belonged to the reference plot 1. A highcorrelation was found between estimated and clipped plot in double sampling method. There was also high correlation between reference plots and their weights, so estimation of double sampling and ranks of comparative yield method were corrected by using regression equations. There were no significant differences among 3 methods, but time consumption of double sampling was better than the other methods. So, because of extensive application of double sampling method in grasslands and shrublands and its high accuracy and precision this method of yield estimation is recommended for the study area.