Continuously applying compost for three years alleviated soil acidity and heavy metal bioavailability in a soil-asparagus lettuce system

• DOI: 10.3389/fpls.2022.972789
• Publication Date: 2022-08-03T05:29:30Z
• Authors: De Chen; Xuezhu Ye; Yugen Jiang; Wendan Xiao; Qi Zhang; Shouping Zhao; Sainan Shao; Na Gao; Miaojie Huang; Jing Hu
• Keywords: Asparagus; Topsoil

Soil acidification and heavy metal pollution are two common barrier factors threatening plant growth agro-product quality. Applying manure compost is promising to alleviate soil acidity, while it may increase accumulation in soil. In a 3-year field experiment, was applied for 12 consecutive harvest seasons at 15, 30, 45 t ha-1 slightly acidic Samples were taken the twelfth season examine changes of properties, vegetable productivity, bioavailability soil-asparagus lettuce system. The results showed that pH values topsoil increased by 0.49-0.75 units added soils compared with no control, organic matter (SOM) contents cation exchange capacity (CEC) 34-101% 43-44%, respectively. nutrient also treatments. Continuously applying Cd, Cu, Zn concentrations up 32, 20, 22% decreased Pb 10%, available Cd reduced 54 86%, Cu 19-63%. biomass asparagus 30-59% treatments, tissues 28-50% 14-67%. shoots 20-39%. concentration factor total uptake effectively more prone be up, translocated accumulated from than other metals. over 3 years pH, SOM, CEC, contents, soil-lettuce system, posing risk increasing topsoil.