NITROGEN LEACHING LOSSES ON A VOLCANIC ASH SOIL AS AFFECTED BY THE SOURCE OF FERTILISER

Revista De La Ciencia Del Suelo Y Nutricion Vegetal Pub Date : 2006-01-01 DOI:10.4067/S0718-27912006000200005

M. Alfaro, S. FranciscoSalazar, B. DenisseEndress, L. JuanCDumont, B. AldoValdebenito

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引用次数: 26

Abstract

ABSTRACT An intact lysimeters study was carried out to measure the potential nitrogen (N) losses onan andisoil of Southern Chile with different fertilisers. The treatments tested were: fishslurry (FS), dairy slurry (DS), potassium nitrate (IF) and a control treatment (C), with no Naddition. An equivalent amount of 150 kg of total N ha -1 was applied to each lysimeter andthen the equivalent to 1260 mm of rainfall was irrigated over a 90 days period. Leachatesamples were analysed for nitrate, nitrite, ammonia and organic N (No). Total N losseswere calculated as the product between drainage and the respective N concentration in theleachates. Lowest N losses were obtained in the control and FS treatments (66 kg N ha -1 )and the greatest amount was obtained in the IF treatment (261 kg N ha -1 ). Nitrogen wasmainly lost as nitrate and No (each was 49% of the total N losses). High soil organic matterof andisoils can be more relevant than fertiliser for N leaching losses. Palabras claves: Lodo de pescado, purines de lecheria, fertilizante inorganico, calidad deagua

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受肥料来源影响的火山灰土壤氮淋失

摘要采用完整溶渗仪研究了不同肥料对智利南部地区土壤中氮(N)的潜在损失。试验处理为:鱼浆(FS)、乳浆(DS)、硝酸钾(IF)和不添加氮的对照处理(C)。在每台渗滤仪上施用相当于150公斤总氮ha -1的量，然后在90天内灌溉相当于1260毫米的降雨量。对浸出液样品进行硝酸盐、亚硝酸盐、氨和有机氮(No)分析。总氮损失计算为排水与渗滤液中各自氮浓度的乘积。对照和FS处理氮素损失最小(66 kg N ha -1)， IF处理氮素损失最大(261 kg N ha -1)。氮素主要以硝态氮和硝态氮的形式损失(各占氮素总损失的49%)。与肥料相比，高土壤有机质和油类对氮淋失的影响更大。Palabras claves: Lodo de pescado，嘌呤de lecheria，无机肥，calidad deagua

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Revista De La Ciencia Del Suelo Y Nutricion Vegetal

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