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首页> 外文期刊>International journal of soil science >Phosphorus Availability in Calcareous Soil Amend with Chemical Phosphorus Fertilizer, Cattle Manure Compost and Sludge Manure
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Phosphorus Availability in Calcareous Soil Amend with Chemical Phosphorus Fertilizer, Cattle Manure Compost and Sludge Manure

机译：用化学磷肥，牛粪堆肥和污泥肥修正石灰性土壤中磷的有效性

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Addition of organic manure could improve the soil physical and chemical conditions. Besides it might also increase the efficiency of added P fertilizers and provide additional sources of nutrients. Information on the availability of P following chemical fertilizer and compost addition to soil may help in better management of P fertilization. The aim of this work was to study the combined effect of various levels and kinds of organic and chemical P fertilizer on P availability in a calcareous soil, through an incubation experiment. Treatments included four rates of added P (20, 40, 80 and 160 mg P2O5 kg-1 soil) and control, one from an inorganic source (KH2PO4) and two from organic sources (Cattle manure and Sludge compost). The soil was incubated at 25°C and was maintained at 80% water holding capacity . Change in the amount of available P was measured during 16 weeks. By increasing the time of incubation, P availability in soil significantly decreased for both organic compost and inorganic fertilizer. It is concluded that the most critical time of incubation is the first week. In this time the soil loses almost 50% of the added P. Inorganic P fertilizer yielded more extractable P compared to the two organic sources only in the first week while the rest of incubation period, the amount of P available from the cattle manure compost was significantly higher.
机译：添加有机肥可以改善土壤理化条件。此外，它还可以提高添加的磷肥的效率并提供更多的养分来源。有关化肥和向土壤中添加堆肥后磷的有效性的信息可能有助于更好地管理磷肥。这项工作的目的是通过孵化实验研究各种水平和种类的有机和化学磷肥对钙质土壤中磷有效性的综合影响。处理包括四种添加磷的比例（分别为20、40、80和160 mg P 2 O 5 kg -1 土壤）和对照，一种无机来源（KH 2 PO 4 ）和两种有机来源（牛粪和污泥堆肥）。将土壤在25℃下孵育并保持在80％的持水量。在16周内测量了有效磷含量的变化。通过增加孵化时间，有机堆肥和无机肥料在土壤中的磷利用率均显着下降。结论是，最关键的孵育时间是第一周。在这段时间内，土壤损失了几乎50％的磷。仅在第一周，无机磷肥料与两种有机来源相比就产生了更多的可提取磷，而在潜伏期的其余时间内，可从牛粪堆肥中获得的磷量为明显更高。

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