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Research on Irrigation Technology Elements of Wheat and Maize in Bed Planting and Furrow Irrigation

Author: ZhaoZuo
Tutor: WangJianZhong
Course: Agricultural Soil and Water Engineering
Keywords: Integration ridge Soil infiltration Flow advance and subside Combination oftechnical elements Optimization and evaluation
CLC: S275.3
Type: Master's thesis
Year: 2013
Downloads: 20
Quote: 0
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This study through a large number of field trials and theoretical analysis, optimized andevaluated the irrigation technology elements of wheat and maize in bed planting and furrowirrigation such as ridge width, groove width, groove depth and slope. Draw the followingpreliminary conclusions:(1) Collected a large number of experimental data, calculated the cumulative infiltrationof a combination of elements of different irrigation, after analysis shows: Potential gradientand infiltration area has significant impact on cumulative infiltration. Groove width andgroove depth changes cause changes in wetted perimeter, ridge width changes affect the waterpotential gradient, ridge width and groove width has a greater impact on cumulativeinfiltration, groove depth was less affected and slope only influent infiltration waterdistribution(2) Through the analysis of water infiltration after six hours of wetting front, concludedas follows: Groove width, ridge width and groove depth has a greater impact on the wettingfront, the slope is less affected, and the wetting front curve on the first part of ditch and thetail part of ditch are difference.(3) Through the combination of elements of different irrigation water movementexperimental observations and theoretical analysis, the results showed that: The slope has thegreatest impact, followed by the ridge width, groove width and groove depth.(4) Irrigation efficiency Ea and the irrigation uniformity Ed two indicators as irrigationquality standards, established the irrigation quality evaluation model, using MATLABsoftware to optimize the70cm and110cm ridge width under different furrow irrigationtechnology feature a combination of the quality of irrigation; then set orthogonal experimentfor the combination of elements of different irrigation techniques, range analysis results showthat: slope and ridge width have the greatest impact, as the main factors, the impact of thegroove width and groove depth is small, as a secondary factor. More reasonable combinationof technical elements: the ridge width is70cm, the groove width is40cm, groove depth is20cm and slope is1‰.

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CLC: > Agricultural Sciences > Agricultural Engineering > Irrigation and water conservancy > Irrigation technology > Ground irrigation
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