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用土培方法研究了两种磷肥 (枸溶性钙镁磷肥CMP和水溶性磷肥过磷酸钙SSP)和两种非水溶性磷肥活化剂(无机矿物活化剂IA和有机活化剂OA)在石灰性土壤中对不同磷效率小麦苗期生长和基因型差异以及磷效率的影响。结果表明 ,SSP和CMP对不同磷效率基因型小麦生长的影响无显著差异 ,但对植株磷效率的影响效果明显不同。SSP可提高植株的磷吸收效率 ,CMP对提高植株的磷利用效率更有效。不同磷效率小麦生长的基因型差异在所有磷肥处理中均表现 ,但在CMP处理中的差异最大 ,不同溶解性磷肥品种可作为小麦磷效率基因型的鉴定材料。两种非水溶性磷肥活化剂对钙镁磷肥均有效 ,但作用大小和方向因小麦基因型不同而异 ,OA有利于磷高效基因型小麦的生长 ,IA对磷低效基因型小麦的生长则更加有利 ,其效果甚至超过水溶性磷肥。经IA处理的CMP能明显提高小麦植株的磷含量和吸磷量 ,并能显著增加土壤的有效磷含量
The effects of two phosphate fertilizers (CMP and SSP) and two water-insoluble phosphate fertilizers (inorganic mineral activator IA and organic activator OA) on calcareous soils Effects of Different Phosphorus Efficiency on Seedling Growth, Genotype Difference and Phosphorus Efficiency in Wheat. The results showed that the effects of SSP and CMP on the growth of different P efficient wheat genotypes were not significantly different, but the effects of SSP and CMP on plant P efficiency were significantly different. SSP can improve the phosphorus absorption efficiency of plants, and CMP is more effective to improve the phosphorus use efficiency of plants. Differences in genotypes of wheat with different P efficiency were observed in all P treatments, but were most different in CMP treatments. Different soluble P fertilizers could be used as identification materials for P efficiency genotypes in wheat. Two kinds of non-water-soluble phosphate activators were effective for both calcium and magnesium phosphates, but their size and direction varied with different wheat genotypes. OA was beneficial to the growth of high-P-efficient wheat and IA to low-efficient genotype wheat More favorable, the effect even more than water-soluble phosphate. The IA treatment of CMP can significantly improve the phosphorus content and phosphorus uptake of wheat plants, and can significantly increase the soil available phosphorus content