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黄土高原向日葵产量的土壤养分限制因子与施肥指标研究
Soil nutrient as yield limitation factors and fertilizer supply index of sunflower in loess plateau
【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。
【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.
【Key words】 Sunflower Limitation factor Fertilizer supply index Loess plateau;
- 【文献出处】 中国油料作物学报 ,CHINESE JOURNAL OF OIL CROP SCIEVES , 编辑部邮箱 ,1998年04期
- 【分类号】S565.506
- 【被引频次】13
- 【下载频次】106