猪粪和磷肥对石灰性土壤无机磷组分及有效性的影响

 通过室温培养一盆栽试验研究了施用猪粪和磷肥后石灰性土壤无机磷组分的变化以及不同无机磷组分对黑麦草吸磷量的贡献。结果表明，施用猪粪和磷肥显著地提高了石灰性土壤Ｃａ２－Ｐ、Ｃａ－Ｐ含量，Ａｌ－Ｐ和Ｆｅ－Ｐ也有一定的增加，其中磷肥的影响大于猪粪；Ｃａ２Ｆ和Ｃａ８－Ｐ对黑麦草吸磷总量的直接贡献和间接贡献都大于Ａｌ－Ｐ和 Ｆｅ－Ｐ。

Effects of Pig Slurry and P Fertilizer on Inorganic-P Fractions of Soils and Their Availabilities

Incubation and pot experiments were carried out to study the changes of inorganic-P frac- tions in calcareous soils after application of pig slurry and P fertilizer and their contribution to the amount of P uptake by rye grass. The results indicated that: Application of pig slurry and P fertilizer increased the contents of Ca2-P and Ca8-P significantly and Al-P and Fe-P slightly. P fertilizer, however, showed greater effect on the increment of inorganic-P fractions than pig slurry; The direct and indirect contribu- tion of Ca2-P and Ca8-P to total amount of P uptake by rye grass was higher than that of Al-P and Fe-P.