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首页> 外文期刊>Soil Research >Phosphorus budget and organic phosphorus fractions in response to long-term applications of chemical fertilisers and pig manure in a Mollisol
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Phosphorus budget and organic phosphorus fractions in response to long-term applications of chemical fertilisers and pig manure in a Mollisol

机译：长期施用化肥和猪粪中磷的磷收支和有机磷含量

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摘要

This paper describes the effects of chemical fertiliser and pig manure application on the phosphorus (P) balance and changes of soil organic P (P-o) fractions in a Mollisol following 14 years of maize-soybean-wheat rotation in Northeast China. The experiment was designed according to the local crop rotation and management system, consisting of a control treatment with no fertiliser application, a treatment with chemical nitrogen (N) and P fertilisers, and a treatment with chemical N and P fertilisers plus pig manure. The results suggest that the levels of local chemical fertiliser applications seem to balance the P removal by the crops, while the additional P in the pig manure resulted in substantial accumulation of P in the soil despite greater crop production. Analysis of P-o fractions showed that long-term cultivation without fertilisation reduced the soil labile P-o. Additions of P through application of chemical fertilisers only preserved the labile P-o content, whereas addition of chemical P fertiliser plus pig manure increased the labile P-o content. Comparison between 1993 and 2007 soil samples indicates that the moderately labile P-o content declined in all treatments, whereas the non-labile Po content increased. These results suggest that the moderately labile P-o may be transformed into labile P-o and P-i, and that some active P fractions were immobilised during long-term cultivation. Adding fertiliser increased P availability and alleviated soil P immobilisation.
机译：本文描述了14年玉米-大豆-小麦轮作后，化肥和猪粪的施用对土壤中磷（P）平衡和土壤有机磷（P-o）组分变化的影响。该实验是根据当地作物轮作和管理系统设计的，包括不施肥的对照处理，化学氮肥和磷肥的处理以及化学氮磷肥加猪粪的处理。结果表明，局部化学肥料的施用水平似乎平衡了作物对磷的去除，尽管猪场产量增加，但猪粪中的额外磷仍导致土壤中磷的大量积累。对P-o组分的分析表明，不施肥的长期栽培减少了土壤不稳定的P-o。通过施用化学肥料添加磷只能保留不稳定的P-o含量，而添加化学P肥料加猪粪可以增加不稳定的P-o含量。 1993年和2007年土壤样品之间的比较表明，在所有处理中中等不稳定的P-o含量均下降，而非不稳定的Po含量则增加。这些结果表明，中等不稳定的P-o可以转化为不稳定的P-o和P-i，并且在长期培养过程中固定了一些活性P组分。添加肥料增加了磷的利用率，减轻了土壤对磷的固定。

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