Use of Aluminum‐ and Iron‐Rich Residues to Immobilize Phosphorus in Poultry Litter and Litter‐Amended Soils
Use of Aluminum‐ and Iron‐Rich Residues to Immobilize Phosphorus in Poultry Litter and Litter‐Amended Soils
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使用富含铝和铁的残留物固定家禽垫料和垫料改良土壤中的磷
DOI：
10.2134/jeq2000.00472425002900060027x
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发表时间：
2000
影响因子：
2.4
通讯作者：
C. Mulchi
中科院分区：
文献类型：
--
作者：
E. Codling;R. Chaney;C. Mulchi
家禽生产集中在马里兰州的东海岸，那里的沙质土壤中倍半氧化物含量很低。水质已受到径流和磷的浸出从家禽凋落物改良的田地。由于磷是地表水富营养化的限制性养分，因此磷的运动是主要关注的问题。本研究的目的是(i)评价富铝饮用水处理渣（DWTR）和富铁渣（IRR）还原水溶性磷和Bray和Kurtz no的能力。家禽凋落物和三种长期凋落物改良土壤中的1-可提取磷（bk - 1p），以及（ii）确定这些残留物对改良凋落物和土壤中的pH和电导率（EC）的影响。采用DWTR和IRR四种比率处理家禽凋落物和土壤，在25°C下孵育7周。在第2周、第4周和第7周取样凋落物和土壤。这两种物质都增加了凋落物和土壤的pH值。在所有速率下，DWTR对凋落物中水溶性磷和bk - 1p均有较好的降低效果。在25和50 g kg -1速率下，IRR对水溶性磷的减少与DWTR相当，但DWTR在降低bk - 1p浓度方面的效果是IRR的两倍。结果表明：在家禽凋落物和长期凋落物改良土壤中掺入富Al和富Fe残余物可显著降低土壤中水溶性磷和bk - 1p；这些残留物可能有助于减少家禽凋落物和凋落物改良田的P径流和淋滤。
Poultry production is concentrated on Maryland's eastern shore on areas with sandy soils low in sesquioxides. Water quality has been affected by runoff and leaching of phosphorus from poultry litter-amended fields. Phosphorus movement is of major concern because P is a limiting nutrient for eutrophication in surface water. The objectives of this study were to (i) evaluate the ability of Al-rich drinking water treatment residue (DWTR) and iron-rich residue (IRR) to reduce water-soluble P and Bray and Kurtz no. 1-extractable phosphorus (BK-1 P) in poultry litter and three long-term litter-amended soils and (ii) determine the effects of these residues on pH and electrical conductivity (EC) in the amended litter and soils. Poultry litter and soils were treated with four rates of DWTR and IRR and incubated for 7 wk at 25°C. Litter and soils were sampled at 2, 4, and 7 wk. Both residue materials increased the pH of the litter and the soils. The DWTR was more effective in reducing both water-soluble P and BK-1 P in litter at all rates. At the 25 and 50 g kg -1 rates, reductions in water-soluble P with IRR were comparable with that of DWTR, but DWTR was twice as effective as IRR in reducing BK-1 P concentration. The results showed that water-soluble P and BK-1 P in poultry litter and long-term litter-amended soils can be substantially reduced by incorporating residues rich in Al and Fe; these residues may be useful for reducing P runoff and leaching from poultry litter and litter-amended fields.