Corn yield response to drainage and subirrigation in Southern Manitoba

Authors: Cordeiro, M, Rs Ranjan, S Sager, B Shewfelt
Description: Tile drains are commonly used in humid regions to deal with high water tables. However, high-value crops could benefit from subsurface drainage even under semi-arid conditions where the high intensity rainfall causes the water table to rise within the rootzone. In Southern Manitoba, seasonally high water table with high salinity has led to salinization of the rootzone, making subsurface drainage an attractive option to increase yields. The objective of this research was to evaluate agronomic performance of corn under water table management using subirrigation/tile-drainage. Four treatments were tested in this experiment: (i) no drainage with no irrigation (NDNI control), (ii) no drainage with overhead irrigation (NDIR), (iii) free drainage with overhead irrigation (FDIR), and (iv) controlled drainage with subirrigation (CDSI). The impact of these treatments on crop performance, measured by yield, kernel quality, plant biomass, and plant height, were evaluated over two growing seasons. In the first year, which was 57% wetter than 30-year average, yields were 8.48 (NDNI), 10.36 (NDIR), 10.10 (FDIR), and 9.22(CDSI) Mg ha
Keywords: tile-drainage, water table, micro-topography, corn yield
Technical field: technical_fields_app7
Session name: Soil and water
Date: 2012
Identifier: CSBE12113
Coverage: Canada

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