نوع مقاله : مقاله پژوهشی
نویسندگان
گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه تهران، استان البرز، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
ABSTRACT
The objective of this study was to investigate the effect of content and size of stones on the water infiltration in two loamy and sandy loam soils. For this, two series of repacked soil samples, with loamy and sandy loam textures, containing mass contents of 0, 10, 20, 30 and 40 percent fine, 4-4.75, and coarse, 7.9- 15.8, mm stones, were prepared separately. The soil mixtures were packed and compacted into 50 cm high cylinders with an inner diameter of 21.5 cm, the cumulative infiltration of both series of the soil samples were measured by using the Marriott system. The presence of the stones in both sandy loam and loamy soils increased the cumulative infiltration compared to the treatments with no stones. The average amount of water infiltration in loamy treatments, mixed with fine and coarse stones were respectively, 25.286 and 104.212 percent, higher than sandy loam treatments, mixed with fine and stones. Fine stones in sandy loam and coarse stones in loamy soils, had the highest effect on the increase of cumulative infiltration. However, some fluctuations were observed under the stone content of 20 percent and results showed, the stones do not always increase the amount of water infiltration in the soil, also the effect of the stone size on the water infiltration depends on the stone content. The results also indicated, the stone affects the amount of water infiltration in both soils by affecting the total soil bulk density, and the fine earth bulk density.
کلیدواژهها [English]
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