The study of qualitative, quantitative characteristics of lombardy and common(shirazi) poplars species in manually planted stands in Western Isfahan province

摘要

In order to study the qualitative, quantitative characteristics of a pure common ( Shirazi) poplar stand in Polkalleh & a mixed stand of Lombardy & Shirazi poplars in Karchegan, two 30-year-old stands were selected with a plantation interval ( spacing) of 2.5 × 1.5 m. in each stand, 30 2-are sample pcs ( 20×10m) were randomly selected. In each sample piece, the diameter of all the trees was measured using a diameter gage tape & the height of all the trees was measured using a Sonto gradiometer. From the center of each sample pc up to the depth of 30 cm, the soil was sampled in order to identify soil conditions. In each sample pc, quality studies such as species freshness, crown & trunk qualitative conditions & quantitative parameters (diameter at breast height total height, diameter at breast height & volume) were then conducted. The relation of height in terms of diameter at breast height elongation coefficient in terms of diameter at breast height & the number in the diametrical & height layers were also studied. SPSS and Excel Statistical software's was used for analysis. Regarding the results and production: Soil texture was analyzed for both clay stands. The pure Shirazi poplars stand is in a better situation than the Lombardy & Shirazi poplars mixed stand. Compared with the Lombardies, the Shirazis have a better situation in the Lombardy-Shirazi poplar stand.