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首页> 外文期刊>Canadian Journal of Soil Science >Papermill biosolids and alkaline residuals affect crop yield and soil properties over nine years of continuous application.
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Papermill biosolids and alkaline residuals affect crop yield and soil properties over nine years of continuous application.

机译：在连续应用九年后，造纸厂的生物固体和碱性残留物会影响作物的产量和土壤特性。

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摘要

Residues from paper and wood mills are a valuable source of nutrients for field crops, but little is known about the effectiveness of repeated applications over many years. A study was initiated at Yamachiche, QC, to assess the effect of continuous applications over 9 yr of combined papermill biosolids (PB), applied alone or with several liming by-products, on grain yield, plant nutrient accumulation, and soil fertility in a loamy soil cropped to grain corn, dry bean, and soybean. The PB treatments (0, 30, and 60 Mg wet ha-1) and liming by-products [calcitic lime (CL), lime mud (LM), wood ash (WA)], and two magnesium residuals, each at 3 Mg wet ha-1 along with (30 Mg PB ha-1) were surface applied annually at post-seeding. In the last 6 yr, the two treatments receiving magnesium residuals were replaced with 90 Mg wet PB ha-1 and mineral N fertilizer (MIN), respectively. Repeated annual applications of LM followed by CL increased soil pH the most (up to 1.4 unit). Crop yields were not significantly affected by treatments in the first 3 yr but subsequent applications of PB at 90 Mg ha-1 increased yields in grain corn (+1.9 Mg ha-1) and dry bean (+0.77 Mg ha-1) relative to the control, while PB with WA increased yield in soybean (+0.85 Mg ha-1). The PB at 30 Mg wet ha-1 with supplemental N (average of 45 kg N ha-1), or at 60 Mg wet ha-1 applied alone, achieved yields comparable with MIN treatment under corn. The PB applications increased soil organic matter and all major soil nutrients except K and Mg. The results of this study indicate that PB and alkaline residuals can be effectively applied to agricultural soils over many years although PB exceeding 60 Mg wet ha-1 yr-1 induce significant nitrate leaching.
机译：造纸厂和木厂的残留物是大田作物营养的重要来源，但多年重复使用的效果鲜为人知。在QC的Yamachiche开展了一项研究，以评估连续施用9年以上的造纸厂生物固体（PB）联合施用（单独施用或与几种石灰副产物一起施用）对谷物产量，植物养分积累和土壤肥力的影响。种植玉米，干豆和大豆的沃土。 PB处理（0、30和60 Mg湿ha -1 ）和石灰副产品[钙化石灰（CL），石灰泥（LM），木灰（WA）]和两种每年在播种后对镁残留量进行表面处理，每个残留量为3 Mg湿ha -1 和（30 Mg PB ha -1 ）。在过去的6年中，分别用90 Mg湿PB ha -1 和矿质氮肥（MIN）代替了两种残留镁的处理方法。每年重复施用LM和CL，使土壤pH值增加最多（最高1.4个单位）。前3年的处理对作物产量没有显着影响，但随后施用90 Mg ha -1 的PB可增加谷物玉米的产量（+1.9 Mg ha -1 ）和干豆（相对于对照+0.77 Mg ha -1 ），而PB和WA使大豆的产量增加（+0.85 Mg ha -1 ）。 PB在30 Mg湿ha -1 处补充N（平均45 kg N ha -1 ），或60 Mg湿ha -1 单独施用，可获得与玉米下的MIN处理相当的产量。 PB施用增加了土壤有机质和除K和Mg外的所有主要土壤养分。这项研究的结果表明，尽管PB超过60 Mg湿ha -1 yr -1 会产生大量的硝酸盐，但是PB和碱性残留物可以在农业土壤上有效使用多年。浸出。

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