吉林省西部盐化黑钙土区芝麻水肥耦合效应研究

Interaction between Water and Fertilizer on Sesame Growth in Salinized Chernozem Soil Restern of Western Jilin Province

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。

Using 311-B optimum regression design,the effect of interaction between water and ferlilizer on sesame growth was studied through potculture experiment under artificial control in a plastic shed .The result shows:water was an important factor for fertilizer effect,the yield responses of sesame to the three factors were in order of water>N>K and effect of three factors>effect of two factors>effect of single factor.Water was the important restricted factor al so for N and K and to increase application rate of N、K improved the yield of sesame with sufficient water. The best design of N,K and water for high yield was : water 380.6-405.5mm,P 0.32 g; N 1.49-2.03g/basin,K 1.65-2.17g/basin.