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首页> 外文期刊>Soil Research >Amending soil with sludge, manure, humic acid, orthophosphate and phytic acid: effects on aggregate stability.
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Amending soil with sludge, manure, humic acid, orthophosphate and phytic acid: effects on aggregate stability.

机译：用污泥，肥料，腐殖酸，正磷酸盐和植酸修正土壤：对骨料稳定性的影响。

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Recycling of organic wastes via their incorporation in cultivated lands is known to alter soil structural stability. Aggregate stability tests are commonly used to express quantitatively the susceptibility of soil structural stability to deformation. The objective of this study was to investigate the effects of biosolids addition, namely composted manure (MC) and activated sludge (AS), and spiking of the soils with orthophosphate (OP), phytic acid (PA) or humic acid (HA), on soil aggregate stability of semi-arid loamy sand, loam and clay soils before and after subjecting the soils to six rain storms (each 30 mm rain with a break of 3-4 days). Aggregate stability was determined from water-retention curves at high matric potential. The effects of the applied amendments on pre- and post-rain aggregate stability were inconsistent and soil-dependent. For the pre-rain state, all of the tested amendments improved aggregate stability relative to the control. For the post-rain condition, aggregate stability was lower in the MC, OP and PA treatments and higher in the AS and HA treatments than in the control. The coarse-textured loam and loamy sand soils were more affected by the soil amendments than the clay soil. For the pre-rain state, addition of organic matter significantly improved macro-porosity and hence the stability of apparent macro-aggregate (>250 micro m). Our results indicate a possible advantage for separation of aggregates into macro- and micro-aggregates for more precise evaluation and understanding of the effects organic amendments might have on aggregate stability.
机译：通过将有机废物掺入耕地中进行回收利用会改变土壤结构的稳定性。集料稳定性测试通常用于定量表示土壤结构稳定性对变形的敏感性。这项研究的目的是研究添加生物固体即堆肥（MC）和活性污泥（AS）以及用正磷酸盐（OP），植酸（PA）或腐殖酸（HA）加标土壤的影响，半干旱壤土沙壤土，壤土和黏土在土壤遭受六次暴雨前后（每次降雨30毫米，间隔3-4天）前后的土壤团聚体稳定性。根据高基质势下的保水曲线确定骨料的稳定性。所应用的修正对雨前后骨料稳定性的影响是不一致的，并且取决于土壤。对于雨前状态，所有测试的修正均相对于对照提高了骨料的稳定性。对于雨后条件，MC，OP和PA处理的集料稳定性低于对照组，而AS和HA处理的集料稳定性更高。质地较厚的壤土和壤质砂土比黏土受土壤改良剂的影响更大。对于雨前状态，添加有机物可显着改善宏观孔隙度，从而改善表观宏观聚集体（> 250微米）的稳定性。我们的结果表明，将骨料分离为宏观骨料和微观骨料可能具有优势，以便更精确地评​​估和了解有机改性剂可能对骨料稳定性的影响。

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