نوع مقاله : پژوهشی
نویسندگان
1 عضو هیئت علمی مرکز پژوهش های کشاورزی و منابع طبیعی قزوین
2 استادیار، دانشکده مرتع و آبخیزداری دانشگاه علوم کشاورزی و منابع طبیعی گرگان
3 دانشجوی دکتری مرتعداری، دانشکده منابع طبیعی، دانشگاه تهران
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
Plant species has a particular time period for growing readiness and grazing at a particular time must also stop. Moreover, rangeland soil is ready only in certain times to sever livestock. Without understanding these characteristics, determining the grazing season and livestock management and grazing is not possible. With this study, the revising of grazing rangeland management programs in similar areas with similar vegetation will be possible. So in order to determine the timing of entry and exit of livestock to and from rangeland this study was carried out in a semi-steppe rangeland in Alamot of Ghazvin province, 100 km North eastern of Ghazvin five years from 2006 to 2010. In this study, first selected floristic list of rangeland species and selected 2 valuable and important species. The two studied grass species was Dactylis glomerata (class I) and Agropyron intermedium (class II). So information of phenology plant noted in 2 stages: growth stage in every 15 days and reproductive stage in every 7 days. The results showed that A. intermedium starts its vegetative stage at beginning of (April), their flowering time is the half of Khordad (June) and its seeding phases start at beginning of Tir (July). In the last week of May, we do the seeding phase. Reproductive stage of D. glomerata began from second half of Ordibehesht (May), in Khordad entered at the flowering stage and from mid of Khordad (May) start its seeding phase. The results showed that the time of the start and end of the species growth varied in the different years in this species affected by rainfall and temperature.
کلیدواژه‌ها [English]
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