Ash from the thermal gasification of pig manure—effects on ryegrass yield, element uptake, and soil properties
Ash from the thermal gasification of pig manure—effects on ryegrass yield, element uptake, and soil properties
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猪粪热气化产生的灰分——对黑麦草产量、元素吸收和土壤性质的影响
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
B. Yusiharni
中科院分区：
文献类型：
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作者：
K. Kuligowski;R. Gilkes;T. Poulsen;B. Yusiharni
研究了热解气化猪粪灰（GA）和无石灰气化猪粪灰（LF-GA）对酸性土壤（pH 4.5）性质及黑麦草（Lolium rigidum Gaudin）生长和元素吸收的影响。GA是一种有效的石灰剂（添加2%提高土壤pH值从4.5到7.9）; GA和LF-GA增加土壤电导率和碳酸氢盐可提取的磷（P）。土壤施肥LF-GA支持略高于GA（1.5-1.7 v. 1.2-1.5克DM/公斤土壤）的第一次收获，由于更大的初始P的可用性在pH 6的植物干物质（DM）产量。然而，随后两次收获的植物产量相似，因为随着时间的推移，土壤酸度将石灰溶解在未经处理的灰烬（GA）中。灰处理的土壤和磷酸二氢钙（MCP）处理的土壤的最大产量相似。相对农艺有效性的磷源为三个收获，植物磷含量的基础上，与MCP的值相比，分别为6，11和12%的GA和19，10和33%的LF-GA。磷利用的内部效率是相似的所有三个磷源，每次收获，产量的差异主要是磷供应的差异的后果。用火山灰施肥的植物中的重金属浓度很小，在监管范围内。在一般情况下，灰的应用并没有系统地影响元素（Al，B，Cd，Mg，Mn，Fe，Pb，S，Se）在植物中的浓度。
Effects of thermally gasified pig manure ash (GA) and lime-free gasified ash (LF-GA) on properties of an acidic soil (pH 4.5) and the growth and elemental uptake of ryegrass (Lolium rigidum Gaudin) were investigated. The GA was an effective liming agent (2% addition raised soil pH from 4.5 to 7.9); both GA and LF-GA increased soil electrical conductivity and bicarbonate-extractable phosphorus (P). Soil fertilised with LF-GA supported slightly higher plant dry matter (DM) yield than GA (1.5–1.7 v. 1.2–1.5 g DM/kg soil) for the first harvest, due to greater initial P availability at pH 6. However, plant yields for the subsequent two harvests were similar, as soil acidity dissolved lime in untreated ash (GA) over time. Maximum yields for ash-treated soil and soil treated with mono-calcium phosphate (MCP) were similar. Relative agronomic effectiveness of P sources for three harvests, based on plant P content compared with values for MCP, were 6, 11, and 12% for GA and 19, 10, and 33% for LF-GA. Internal efficiency of P utilisation was similar for all three P sources for each harvest, indicating that differences in yield were mostly a consequence of differences in P supply. Heavy metal concentrations in plants fertilised with ash were minor and within regulatory limits. In general, application of ash did not systematically affect the concentrations of elements (Al, B, Cd, Mg, Mn, Fe, Pb, S, Se) in plants.