Phosphorus fractions and phosphorus delivery potential of a luvisol derived from loess amended with organic materials
Phosphorus fractions and phosphorus delivery potential of a luvisol derived from loess amended with organic materials
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DOI：
10.1007/s00374-002-0488-y
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发表时间：
2002-07
影响因子：
6.5
通讯作者：
H. Scherer;S. Sharma
中科院分区：
文献类型：
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作者：
H. Scherer;S. Sharma
在 1962 年开始的一项长期田间试验中，研究了与矿物肥料相比，施用不同有机材料（农家肥 (FYM)、堆肥和污水污泥）时磷的去向。在将这些改良剂连续添加到源自黄土的鲁维土中并种植为谷类根作物序列后，收集了 38 年的土壤样本。各处理的总磷（Pt）含量较原土有所增加； NaOH-无机磷（NaOH-Pi）代表铁和铝结合的磷，是主要的无机部分。实验开始时，各种磷库可以按以下顺序定量排列：NaOH-Pi>残留P~NaHCO3-Pi>H2O-P>HCl-P。顺序变化如下：NaOH-Pi>NaHCO3-Pi>残留P~H2O-P>HCl-P，随着持续施磷和耕作，非不稳定残留P转化为不稳定NaHCO3-Pipool。此外，有机P(Po)形态(NaOH-Po和NaHCO3-Po)含量增加。与 1962 年的磷输送潜力相比，磷输送潜力（可解吸磷库）增加了 35% 至 185%。与施用矿物肥料相比，施用有机物导致土壤的磷吸附能力显着较高，而 FYM 则较低。乳酸钙可提取磷（植物有效磷）从 1962 年的 43.1 mg kg-1 土增加到 49 吨堆肥 ha-1 处理后的 175.9 mg kg-1 土。与1962年的Fe-O含量相比，不同处理的柠檬酸连二硫酸盐Fe-O含量增加了44%~154%。在盆栽试验中，黑麦草对田间土壤的除磷顺序为：FYM>堆肥=污泥>矿肥。
In a long-term field experiment, started in 1962, the fate of P applied with different organic materials [farmyard manure (FYM), compost and sewage sludge] in comparison to mineral fertilizer was investigated. Soil samples were collected after 38 years' continuous addition of these amendments to a luvisol derived from loess and cultivated to a cereal-root crop sequence. The total P (Pt) content of all treatments increased compared with the original soil; NaOH-inorganic P (NaOH-Pi) representing Fe- and Al-bound P was the dominant inorganic fraction. At the beginning of the experiment the various P pools could be quantitatively ranked in the following order: NaOH-Pi>residual P~NaHCO3-Pi>H2O-P>HCl-P. The order changed as follows: NaOH-Pi>NaHCO3-Pi>residual P~H2O-P>HCl-P, with transformations of non-labile residual P to the labile NaHCO3-Pipool with continued P fertilization and cropping. In addition, the content of organic P (Po) forms (NaOH-Poand NaHCO3-Po) increased. Ptdelivery potential (desorbable P pool) increased between 35% and 185% compared to the P delivery potential in 1962. Compared to mineral fertilizer application, the application of organics resulted in a significantly higher, and FYM in a lower, P adsorption capacity of soils. The calcium lactate-extractable P (plant-available P) increased from 43.1 mg kg–1soil in 1962 to 175.9 mg kg–1soil in the treatment with 49 t compost ha–1. The increase in the citrate-dithionate Fe-O ranged between 44% and 154% in the different treatments compared to the Fe-O content in 1962. In a pot experiment with soil from the field experiment, P removal by ryegrass was in the following sequence: FYM>compost=sewage sludge>mineral fertilizer.