The Effect Of Water-fertilizer Coupling On The Quantitative Index Of Summer Squash In Greenhouse

This experiment is goal variable (Y) with 3 factor 5 horizontal twice general revolving combination designs, with output, with fill water quantity (X₁) ,use nitrogen quantity (X₂), use potassium quantity(X₃) 3 factor is decision variable, get Summer Squash output for 3 because of the regression model of variable:Y=81109.5+1917. 0X₁ +4500.0X₂+1300. 5X₃-1521. 0X₁² - 1167. 0X₂² -1917. 0X₃²-3483.0X₂X₃. Analysis result shows:1. The effect of three factors on the yield of squash increased by degree in the series of N >H₂O>K₂O This result with the result that forefathers study about squash for the size of the uptake of nutrition element appearance coincide. In this experiment, water becomes to affect the second factor after squash output house nitrogen vegetarian meal, explains that in the growth course of squash, nitrogen vegetarian meal is for squash growth grows up and the influence of output level the influence that is higher than water.2 The interaction among these three factors existed. There is positive interaction among them in the level lower than 0.6302 and 1.9280, 0.6302 and 0.3392, 3.9704and -3.9970;and negative interaction among them higher than the levels.3. By simulation with computer, the amount of N, H₂O and K₂O for the highest yield were 2815.5m³/hm², 447kg/hm², 36kg/hm² respectively.Pass for model reach best fill water quantity, nitrogenous fertilizer and potash fertilizer match than use quantity verify , part with most differ from match than with peasant fill water generally apply fertilizer level contrast , since planting Man length Man thick Leafamount leaf area Melon thick melon length, merchandise rate, solubility sugar and V_c content aspect blade nutrition index and the forms, is higher than other two handlings. From model choose good income to fill water quantity, nitrogenous fertilizer and potash fertilizer match than output highest, production cost, production profit and production investment efficiency are first hm^-2 of 0.58×10⁴, first hm^-2 of 1.93×10⁴ and the / Yuan of 3.33 Yuan respectively, cultivate effect is better than obviously other match than. Prove that the model that founded is accurate and reliable. With the management index guidance production of this fertilizer water quantification, the output that can not only raise squash is also worthed for guiding the section fat efficiently fair contract culture of water saving that realizes the agriculturalmodern and sunlight greenhouse production of computer control and having important theoretical value and application.