期刊
AGRONOMY-BASEL
卷 12, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/agronomy12010209
关键词
biosolids; lettuce; soil productivity; pulp mill dregs; heavy metals; residues
资金
- Fundo Europeu de Desenvolvimento Regional (FEDER) [POCI-01-0247-FEDER033662, UIDB/00102/2020]
- [POCI-010247-FEDER-033662]
This study evaluates the performance of different soil amendments, including dried sewage sludge, green liquor dregs mixed with sewage sludge, raw sewage sludge, and commercial organic fertilizer, on lettuce crops. The results show that using dried sewage sludge and green liquor dregs mixed with sewage sludge as soil amendments increases lettuce productivity and meets ideal nitrogen and calcium levels, similar to commercial fertilizer.
Sustainable agriculture practices within the guidelines of nutrient recycling and the circular economy must be increasingly promoted. This work aims to evaluate the performance of dried sewage sludge (DSS), green liquor dregs mixed with sewage sludge (DSSA), raw sewage sludge, and commercial organic fertilizer control, using a short-term agronomic assessment with lettuce crop (Lactuca sativa) in greenhouse conditions. Different application rates based on the nitrogen content were tested for each soil amendment: 0, 85, 170, and 225 kg N/ha (treatments T0, T1, T2, and T3, respectively). DSS and DSSA resulted in fresh lettuce productivities 1.3 and 3.2 times higher in T3 than in T0, respectively. The ideal N content in lettuce leaves was reached for all materials and treatments, with the highest values obtained for DSS (2.88-3.33% from T1 to T3). Lettuce produced in soils amended with DSS and DSSA showed also ideal levels of Ca. Overall, the performance of sludge-based products was similar to commercial fertilizer, without impairing the nutritional balance of the crop and the soil.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据