Offered Papers Theme A: Efficient Production from Grassland
Description
Forage production is a most important vegetation attribute in rangeland analysis and evaluation and use in management practices. Artemisia sieberi covered about 47% of the rangeland area in Iran and scientists need to know the best method for analysis and evaluation of this species. Clipping and weighing has high precision, but this method is time-consuming and expensive and alternative methods are required. Russian scientists developed a biometric method based on plant dimensions and suggest this method for rangelands in the Middle East (discussed by Dianati, 2003). In America, Muray (1982) used plant dimensions for yield estimation and regression models for estimating production. This method required the selection of a lot of individual plants for each species to draw curves and estimate forage production. The critical stage of this method is the determination of the relationship between plant dimensions and yield. The research showed that in A. sieberi the best relationship with yield is from height (H) and the sum of diameters (D1 +D2). This relationship should be calculated separately for each species. In this study this method was tested with the Artemisia type in Iran.
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Comparison of a Biometric Method with Clipping and Weighing Method for Estimating the Yield of Artemisia sieberi (Case Study Zarand-e-Save Region)
Forage production is a most important vegetation attribute in rangeland analysis and evaluation and use in management practices. Artemisia sieberi covered about 47% of the rangeland area in Iran and scientists need to know the best method for analysis and evaluation of this species. Clipping and weighing has high precision, but this method is time-consuming and expensive and alternative methods are required. Russian scientists developed a biometric method based on plant dimensions and suggest this method for rangelands in the Middle East (discussed by Dianati, 2003). In America, Muray (1982) used plant dimensions for yield estimation and regression models for estimating production. This method required the selection of a lot of individual plants for each species to draw curves and estimate forage production. The critical stage of this method is the determination of the relationship between plant dimensions and yield. The research showed that in A. sieberi the best relationship with yield is from height (H) and the sum of diameters (D1 +D2). This relationship should be calculated separately for each species. In this study this method was tested with the Artemisia type in Iran.
