Abstract
Reducing run-off and soil loss are important determinants for maintaining productivity and sustainability on sloping agriculture lands. To control water induced soil erosion, a field study was conducted during 2010–2014 to assess the impact of hedge row intercropping on soil erosion, nutrient dynamics, soil moisture and yield of finger millet (Eleusine coracana L.) on 5 and 10% land slope in combination with conservation treatments. The treatment Gliricidia + Trench planting (G + TP) reduced run-off by 29%, soil loss by 45–48%, and loss of soil organic carbon (SOC), N, P and K by 42–47, 62–65, 54–58 and 51–56%, respectively over control. Similarly for Leucaena + Trench planting (L + TP), the values were 17–19, 27–40, 28–37, 42–50, 39–49, and 37–46%, respectively, over control. Reduced run-off in the G + TP treatment increased soil moisture storage by 11–29%. Intensive pruning of Gliricidia plants for 5 years yielded greater fresh leaf biomass (12–17 Mg ha−1 year−1), whereas Leucaena yielded only 4–5 Mg ha−1 year−1. The SOC, N, P and K conservation efficiencies of G + TP were 42–47, 62–64, 54–58 and 51–56% on 5 and 10% land slope, respectively. Gliricidia hedge row intercropping showed promise for improving the conservation potential of the system by maintaining high productivity. Results of this study will act as a technical reference for the adoption of the Gliricidia based hedge row technology for increasing intercrop productivity as well as conserving soil resources in the Eastern Ghats sloping agriculture lands.
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Hombegowda, H.C., Adhikary, P.P., Jakhar, P. et al. Hedge row intercropping impact on run-off, soil erosion, carbon sequestration and millet yield. Nutr Cycl Agroecosyst 116, 103–116 (2020). https://doi.org/10.1007/s10705-019-10031-2
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DOI: https://doi.org/10.1007/s10705-019-10031-2