---

作 者 ：李志坚 林治安 赵秉强 袁亮 李燕婷 温延臣

期 刊 ：植物营养与肥料学报 2013年 19卷 5期 页码：1183-1191

关键词：增值磷肥；潮土；土壤培养；无机磷组分；

Keywords:value-added phosphate fertilizers, incubation, soil inorganic phosphorus fraction,

摘 要 ：在实验室条件下制备了海藻酸磷肥、腐植酸磷肥和氨基酸磷肥3种增值磷肥，利用室内土壤培养试验研究增值磷肥对潮土无机磷组分及其变化的影响。结果表明， 1）培养180 d后，普通磷肥（磷酸一铵,下同）和增值磷肥均显著提高了土壤速效磷含量，并降低了土壤pH； 施用增值磷肥提高土壤速效磷的幅度为34.6～41.92 mg/kg，高于普通磷肥； 施用增值磷肥降低土壤pH的幅度为0.23～0.36个单位,高于普通磷肥。2) 与普通磷肥相比，增值磷肥明显降低土壤对磷的固定，腐植酸、海藻酸和谷氨酸增值磷肥处理的固定率分别比普通磷肥降低7.32%、7.13%和11.99%。3）培养180 d后，与普通磷肥处理相比，增值磷肥均提高土壤Ca₂-P、 Ca₈-P 和 Al-P含量，减缓Al-P 向 Fe-P 的转化。

Abstract:In this study, the value-added phosphate fertilizers were made by combining humic acid, alginic acid and glantamic acid with mono-ammonium phosphate (MAP), and the composition and transformation of inorganic phosphorus in calcareous soil were studied under laboratory incubation condition. The results show that the soil available phosphorus contents are significantly increased and soil pH is significantly decreased after 180 days’ incubation with the application of phosphate fertilizers, whether they are MAP or the value-added phosphate fertilizers. The soil available phosphorus contents are increased by 34.6 mg/kg to 41.92 mg/kg and soil pH decreased by 0.23 to 0.36 with the application of the value-added phosphate fertilizers. The value-added phosphate fertilizers decrease the P fixation obviously. Compared to the MAP treatment, the P fixation percentages of humic acid phosphate fertilizer, alginic acid phosphate fertilizers and glantamic acid fertilizers are decreased by 7.32%, 7.13% and 11.99%, respectively, and the value-added phosphate fertilizers increase the contents of Ca2-P, Ca8-P and Al-P and retard the transformation from Al-P to Fe-P.

---