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化学肥料的广泛应用虽然大大提高了作物的生产能力,但是由它引起的水源污染和土地质量下降却使人们产生了严重的忧虑。通过改良作物品种和改进施肥方法,提高肥料利用率已有了大量的研究。目前,利用植物生长调节剂改变作物的矿质营养吸收特性已成为热门的研究课题之一。 已经发现,在多种作物中,PP_(333)会改变组织内矿质营养元素的含量。Swietlik和Miller(1984)报道,PP_(333)增加苹果幼苗叶片和枝干中钙的含量,减少钾的含量。Atkinson(1986)发现施用PP_(333)后,苹果叶片中钾和磷的含量减少,不过在田间条件下叶片中含氮量增加,而在盆栽时叶片含氮减少。相反,Wielanc和Wampel(1985)认为PP_(333)对苹果幼苗叶片和根组织内氮、磷、钾和镁水平无显著的影响。由于PP_(333)抑制了植株生长和改变了植株体内养分的分配。故组织内营养元素的含量变化不能反映植株对矿质营养元素吸收的实际情况。本试验的目的是通过水培的方法,研究PP_(333)处理对水仙植株吸收矿质营养元素的效应。
Although the wide application of chemical fertilizers has greatly increased the productivity of crops, water pollution caused by it and the decline of land quality have caused serious concerns. Much research has been done to improve fertilizer use by improving crop varieties and improving fertilization practices. At present, the use of plant growth regulators to change the mineral nutrient absorption characteristics of crops has become a hot research topic. It has been found that PP 333 changes the content of mineral nutrients in a variety of crops. Swietlik and Miller (1984) reported that PP_ (333) increased the content of calcium and reduced the content of potassium in leaves and branches of apple seedlings. Atkinson (1986) found that the content of potassium and phosphorus in apple leaves decreased after application of PP_ (333), but nitrogen content increased in leaves under field conditions and decreased in leaves when potted. In contrast, Wielanc and Wampel (1985) concluded that PP 333 had no significant effect on nitrogen, phosphorus, potassium and magnesium levels in the leaves and roots of apple seedlings. Because PP_ (333) inhibited plant growth and changed the allocation of nutrients in plants. Therefore, changes in the content of nutrients within the organization can not reflect the plant’s absorption of mineral nutrients in the actual situation. The purpose of this experiment was to investigate the effect of PP 333 on the absorption of mineral nutrients by Narcissus plants.