Autecological study of Bothriochloa ischaemum in Golestan province, Iran

Subject Areas : forest

Gh  Abarsaji ¹ (عضو هیئت علمی مرکز تحقیقات کشاورزی و منابع طبیعی ، گلستان ، ایران)
امرعلی  Shahmoradi ² (عضو هیئت علمی موسسه تحقیقات جنگل ها و مراتع کشور، تهران، ایران)
صدیقه  Zarekia ³ (دکترای مرتعداری و محقق مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان یزد، یزد ، ایران)

Received: 2014-04-14 Accepted : 2014-10-04 Published : 2015-02-20

Keywords: Golestan province, Phenology, Bothriochloa ischaemum, Autecology, Habitat,

Abstract :

Studying of autecology of Bothriochloa ischaemum with the aim to find and use the applicable information in rangeland improvement and development programs were carried out. The first was provided habitat. Then were selected two different areas (Tangrah and Gorgan) as study sites. Sampling was carried out by random-systematic method. The ecological characteristics (topographic, climatic, edaphic), canopy cover, density, frequency were investigated. Root system, phenology, preference value and Forage quality were measured. Result showed Bothriochloa ischaemum is grown in these sites as pure and homogeneous. The rainfall in tangrah and Gorgan sites are 866 and 533 mm and mean temperature is 15.66 and 17.8 degree centigrade. Bothriochloa ischaemum is grown on rocky regions and southern slopes 25-80% at 239-1660 m from sea. Soil studies showed that Bothriochloa ischaemum appears on soils with silt–loam and loam texture. Mean canopy cover in Gorgan and Tangrah sites are 88.5 and 78% and density is 1800 and 1600 in hectare. Root system is weaved intensity and it penetrates in the soils to 50 cm. Initial growth occurs end of February, flowering early July, seed ripening end of august and seed falling at the middle of September. Regeneration very good and germination percent is more than 80%. Thousand seeds weigh is 0.23 gr. Seed planting accomplished in original site and most of seeds germinated. This species is heavily grazing.

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