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以芝麻为供试作物,以吉林省西部的盐化黑钙土为供试土壤,采用二次饱和D-最优回归设计(311—B方案),通过人工控制条件下的盆栽试验,研究了不同供水、不同氮和钾施用量条件下,芝麻的水肥耦合效应。结果表明:水是肥效发挥好坏的重要限制因子;氮、钾、水三因素对芝麻的增产效应次序为水>氮>钾,三因素配合效应>二因素配合效应>单因素效应;水分是氮、钾二因子协调发挥作用的重要限制因素,在供水充足的情况下,适当的提高氮、钾肥的用量,可使产量增加;对芝麻来说,获得高产的氮、钾、水最佳施用方案为:浇水量为380.6～405.5mm;P2O5施用量为45.0kghm-2的情况下,N施用量为70.0～95.0kghm-2,K2O的施用量为77.4～101.6kghm-2。
Taking sesame as the test crop, the saline soil of calcareous soil in the west of Jilin Province was used as tested soil. The secondary saturated D-optimal regression design (311-B plan) was used to study the effects of Water and Fertilizer Coupling Effects of Sesame under Different Water Supply and Nitrogen and Potassium Fertilizer Levels. The results showed that: water is an important limiting factor for fertilizer to play a good or bad effect. The order of increasing effect of selenium, nitrogen, potassium and water on three seasons is water> nitrogen> potassium, three factors combined effect> two factors combined effect> single factor effect; Nitrogen, potassium two factors play an important role in the coordination of an important factor in adequate water supply, the appropriate increase in the amount of nitrogen and potassium, can increase production; for sesame, access to high-yielding nitrogen, potassium, water, the best application The plan was as follows: watering amount was 380.6 ~ 405.5mm; when P2O5 was 45.0kghm-2, N application rate was 70.0-95.0kghm-2 and K2O was 77.4-101.6kghm-2.