酸性土壤中固体消化液与未消化牛浆的施肥特性比较

C. Horta, J. Carneiro
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引用次数: 3

摘要

使用消化物或牛浆作为肥料可以有助于营养物质和有机物的回收,从而实现农业循环经济的目标。这项工作旨在评估固体消化物(DG)与未消化牛浆(CS)和矿物肥料(MF)的施肥特性。试验是在酸性土壤中种植黑麦草(Lolium multiflorum Lam.)的花盆中进行的,作物周期为163天。结果表明,在整个作物周期中,DG和CS都没有增加土壤有机质。与CS或MF相比,DG显著增加(P<0.001)土壤交换性碱和土壤磷有效性的总和。此外,DG显著提高(P<0.05)黑麦草的表观磷回收率(43%),与MF(27%)相比。在第一次切割中,DG和CS的黑麦草产量高于MF,在第二次和第三次切割中由于氮有效性的降低而降低。然而,DG或CS施肥可以取代一半的矿质氮施肥,而不会显著降低黑麦草的饲料产量。此外,DG在P的使用方面比CS或MF更高效。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessment of Fertilising Properties of a Solid Digestate in Comparison with Undigested Cattle Slurry Applied to an Acidic Soil
The use of digestates or cattle slurries as fertilisers could contribute to the recycling of nutrients and organic matter, thus meeting the goals of the circular economy in agriculture. This work aims at evaluating the fertilising properties of a solid digestate (DG) in comparison with undigested cattle slurry (CS) and mineral fertilisation (MF). The experiment was performed in pots with ryegrass (Lolium multiflorum Lam.) grown in an acidic soil during a 163 days crop cycle. The results showed that throughout the crop cycle neither DG nor CS increased soil organic matter. DG significantly increased (P < 0.001) the sum of the soil exchangeable bases and soil P availability compared with CS or MF. Also, DG significantly increased (P < 0.05) the apparent P recovery of ryegrass (43%) compared with MF (27%). In the first cut, the ryegrass yield was higher in DG and CS than in MF, decreasing in the second and third cuts as a consequence of a decrease in N availability. Nevertheless, the fertilisation with DG or CS could replace the half amount of mineral N fertilisation, without a significant decrease in the ryegrass forage production. In addition, DG enables greater efficiency in the use of P than CS or MF.
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