نتایج جستجو برای: مرغ cynodon dactylon l
تعداد نتایج: 621394 فیلتر نتایج به سال:
Facilitative interactions between neighboring plants can influence community composition, especially in locations where environmental stress is a factor limiting competitive effects. The longleaf pine savanna of the southeastern United States is a threatened and diverse system where seedling recruitment success and understory species richness levels are regulated by the availability of moist mi...
هدف از تحقیق حاضر شناسایی و ارزیابی گونههای گیاهی مقاوم به فلزات سنگین در منطقه نفتخیز پازنان گچساران بود. از مرکز آلودگی، سه محدوده 0 تا 500 متر، 500 تا 1000 متر و 1000 متر تا 1500 انتخاب گردید. در هر محدوده، 30 پلات 2× 2 مستقر و ویژگیهای پوشش گیاهی برداشت شد و 15 نمونه خاک، از منطقه جمعآوری شد. برای اندازهگیری فلزات سنگین سرب و نیکل از دستگاه icp-oes استفاده شد. شاخصهای tf، bcf و bac ج...
Turfgrasses are the most important cover plants in the world. Quality evaluation of the turfgrasses is usually done by experienced evaluators using color texture, density and uniformity. The results obtained by different evaluators may be different, leading to researcher’s concern. Therefore, some quantitative methods have been used for increasing the aquracy and stability in results. In this s...
We evaluated the allelopathic effect of invasive species Cynodon dactylon from a natural grassland and overseeding intersowing with legumes fertilization phosphorus, on two native grasses, Paspalum notatum dilatatum. Due to what was observed in fertilized grasslands, where cover C. increases, P. decreases dilatatum is not affected, it expected that allelochemicals grasslands would have negative...
BACKGROUND AND OBJECTIVES The homologous group of sweet grasses belongs to the Pooideae subfamily, but grass pollen species from other subfamilies can also cause allergy, such as Cynodon dactylon (Chloridoideae) and Phragmites communis (Arundinoideae). C dactylon and P communis have not been included in the sweet grasses homologous group because of their low cross-reactivity with other grasses....
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید