| Research on water production function of spring maize in Hetao Irrigation District (ID) of Inner Mongolia based on Jensen model |
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| DOI：10.7606/j.issn.1000-7601.2016.03.13 |
| Key Words: water sensitive indexes Jensen model spring maize water requirements water production function assessment |
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| Abstract: |
| In order to systematically analyze the effects of water deficit in different growth stages to the yield of maize in whole growth period, carried out the assessment on timely irrigation. Based on the Jensen model and water balance equation, using the moisture test data and history mearured information, researched the water sensitive index, water requtrements and maximal yield of maize in Hetao ID, established the time change equation of water requirements with the water sensitive index, inclued two forms as Three Parameters Formular and Logistic Equation, on 10 days scale, the simulated results by both of them were very close. Through the back and instance test, there was a good consistence between estimated yield and measured yield, the correlation coefficient of return result was above 0.92, the samples with relative error less than 15% were accounted for 80%. The correlation coefficients tested by the instances were between 0.63 to 0.69, the samples with relative error less than 20% were accounted for 80% to 100%, the simulated results were basically conformed to the reality. |
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