【摘要】 １９９４～１９９６年在黄土高原陕西渭北旱塬进行了向日葵的养分限制因子与高产高效施肥试验，结果表明，Ｎ、Ｐ、Ｋ是向日葵产量的限制因子。Ｆｅ、Ｚｎ、Ｍｇ、Ｃｕ、Ｍｎ、Ｂ为非限制因子，限制因子对向日葵的产量效应Ｋ＞Ｎ＞Ｐ，经济效应最佳施肥指标Ｎ１６３．２１～１６９．８９ｋｇ／ｈｍ２，Ｐ２Ｏ５１２８．６０～１３１．９１ｋｇ／ｈｍ２，Ｋ２Ｏ１８１．３７～１９０．０９ｋｇ／ｈｍ２。更多还原

【Abstract】 From 1994 to 1996, the experiment of soil nutrient as yield limitation factors and fertilizer supply index of high yield and great profit in sunflower had been carried out in Weibei dryland, loess plateau, Shaanxi. The result showed that N,P and K were the yield limitation factors of sunflower. Fe,Zn,Mg,Mn,Cu and B were not the yield limitation factors. The yield responses of sunflower to the limitation factors were in the order of K 2O>N>P 2O 5. The fertilizer supply ranges of optimum enconomic benefit were N 163.21～169.89 kg/hm 2, P 2O 5 128.60～131.91 kg/hm 2, K 2O 181.37～190.09kg/hm 2.更多还原