| Analysis of gray association between soil water with rainfall under the full coverage double-ridge with plastic and water utilization rate for maize |
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| DOI：10.7606/j.issn.1000-7601.2009.01.18 |
| Key Words: double ridges with full film coverage soil water storage gray association analysis maize water utilization rate |
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| Abstract: |
| The rain water utilization, soil water storage, water conservation and water supply ability were studied under double ridges with full film coverage.The results showed that the average water storage during 15 d measure time periods under double ridges with full film mulching was 14.7 mm, 17.9 mm and 29.6 mm more than that under full tiling with plastic, half coverage and no coverage respectively. The gray association order of 4 cultivation patterns was open ground (0.727) >double ridges with full film mulching (0.645) > full tiling with plastic (0.641) > half coverage (0.635) .It means that accepting rain ability of double ridges with full mulching was second only open ground.Under double ridges with full mulching, water coefficient of maize (Zea may) was 35.9%、10.5% and 17.1% lower than open ground, hat under full tiling with plastic, half coverage and full tiling with plastic coverage respectively, and water utilization rate was 10.41, 3.34 and 4.95 kg/ (mm·hm2) higher respectively.The promotion of planting maize under double ridges with full mulching would increase water use efficiency in the rain-fed agriculture regions. |
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