CAJ | 학술논문

　　采用分根法，通过盆栽试验，以四元二次回归正交旋转组合设计，研究了根系分区交替灌溉条件下灌水量和氮、磷、钾肥用量对番茄果实中有机酸含量的影响。通过回归分析，建立了番茄有机酸含量与水肥因子的数学模型。结果表明，在其他因子为中间水平时，番茄果实中的有机酸含量，随灌水量增加呈线性减小趋势；随施氮量增加表现为线性增长；随施磷量、施钾量增加呈开口向下抛物线型变化。交互效应表现为，灌水量与施钾量、施氮量与施磷量对番茄有机酸积累有显著的正交互作用。认为增施氮磷肥会增大番茄果实有机酸含量，合理施用钾肥、减小灌水量也促使番茄中有机酸的积累。
　　채용분근법，통과분재시험，이사원이차회귀정교선전조합설계，연구료근계분구교체관개조건하관수량화담、린、갑비용량대번가과실중유궤산함량적영향。통과회귀분석，건립료번가유궤산함량여수비인자적수학모형。결과표명，재기타인자위중간수평시，번가과실중적유궤산함량，수관수량증가정선성감소추세；수시담량증가표현위선성증장；수시린량、시갑량증가정개구향하포물선형변화。교호효응표현위，관수량여시갑량、시담량여시린량대번가유궤산적루유현저적정교호작용。인위증시담린비회증대번가과실유궤산함량，합리시용갑비、감소관수량야촉사번가중유궤산적적루。
Quadratic orthogonal regressive rotation design with four factors was used to investigate the effects of irri-gation amount and fertilizer rates of nitrogen ,phosphorus and potassium on organic acid content in tomato by pot experi-ment under alternate partial root-zone irrigation ,and the regression model on water and fertilizer and organic acid content in tomato was established .The results showed that ,if other factors were at zero codes ,the organic acid content in tomato decreased linearly with the increase of irrigation amount ,while it increased linearly with the increase of nitrogen fertilizer rate .The relationship between organic acid content and phosphorus fertilizer rate or potassium fertilizer rate showed a changing trend as opening downward parabola .There were positive interaction effects between irrigation amount and potassium fertilizer rate ,and between nitrogen fertilizer rate and phosphorus fertilizer rate .It was indicated that increas-ing the fertilizer rates of nitrogen and phosphorus could raise the organic acid content of tomato effectively ;proper appli-cation of potassium fertilizer and proper reduction of irrigation water could also improve the accumulation of organic acid in tomato .