Evaluating Soil Erosion and Nutrition Depletion on Land Use Types Intercropped with Macadamia in Tuy Duc District, Dak Nong Province

Date Received: 12-10-2017

Date Accepted: 20-11-2017

Date Published: 06-08-2025

##submissions.doi##: https://doi.org/10.31817/tckhnnvn.2017.15.10.

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Issue: Vol. 15 No. 10 (2017)

Section:

TÀI NGUYÊN VÀ MÔI TRƯỜNG

How to Cite:

Yen, L., Dung, N., & Binh, V. (2025). Evaluating Soil Erosion and Nutrition Depletion on Land Use Types Intercropped with Macadamia in Tuy Duc District, Dak Nong Province. Vietnam Journal of Agricultural Sciences, 15(10), 1365–1374. https://doi.org/10.31817/tckhnnvn.2017.15.10.

Evaluating Soil Erosion and Nutrition Depletion on Land Use Types Intercropped with Macadamia in Tuy Duc District, Dak Nong Province

Le Trong Yen , Nguyen Van Dung (*) , Vu Thi Binh

  • Tác giả liên hệ: [email protected]

    • Keywords

    Land use types, Macadamia, surface runoff, erosion, nutrition depletion

    Abstract


    Land use is one of the most important factors that affects soil erosion because land use types impact changes in soil surface, land cover, and soil nutrition. This study of agricultural land use types (coffee, pepper, and forest) intercropped with Macadamia on basalt soil in Tuy Duc district, Dak Nong province showed that these land use types clearly affected soil erosion, leaching, and soil nutrition depletion. Four treatments (Tr) were planted on a 6 - 7o slope including 1 treatment of 3 - year old Macadamia trees planted as a monoculture and 3 treatments of 3 - year old Macadamia trees intercropped with coffee, pepper, or forest trees, and 2 treatments were planted on a 12 - 13o slope including 6 - year old Macadamia trees planted as a monoculture and Macadamia intercropped with forest tress. The results of the 6 treatments showed that at the slope of 6 - 7o, treatment 2 (Tr.2; Macadamia and coffee) had the highest coverage (72.09%) and the Macadamia monoculture (Tr.1) had the lowest coverage (6.96%). Surface runoff varied from 153 to 195 mm, and the amount of soil erosion was from 10.8 to 26.4 tons/ha/year. At the slope of 12 - 13o, surface runoff was from 188 to 285 mm and soil erosion amount was from 15.6 to 33.7 tons/ha. The above results also depended on land use types. On the land use type of Macadamia monoculture planted on a slope of 12 - 13o, soil loss was 33.7 tons/ha. On land use type of Macadamia intercropped with forest trees, soil loss was only 25.3 tons/ha. Total N, P2O5 and K2O were lost more than those in available form. For example, in treatment 1 (only Macadamia), total N loss was 100.23 kg, of which, available N loss was only 25.08 kg/ha.

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