Effect of Sewage Sludge and its Biomass Composting Product on the Soil Characteristics and N2O Emission from the Tomato Planting Soil

Abstract

To cite this paper: He, S., A. Li and L. Wang, 2016. Effect of sewage sludge and its biomass composting product on the soil characteristics and N2O emission from the tomato planting soil. AbstractIn this study, tomato plants were cultivated in the greenhouse in five consecutive experiments: fertilized with 800 kg N ha -1 fresh sludge (S-H), 400 kg N ha -1 fresh sludge (S-L), 800 kg N ha -1 straw composting product (VM-S), 800 kg N ha -1 swine manure composting product (VM-M) and no fertilization (CK), and the soil properties, inorganic nitrogen forms and N2O emission characteristics were investigated. The results showed that, treatments with composting product significantly increased the soil electrical conductivity (EC) (p<0.05), and the VM-M treatment exhibited the largest soil EC. With the addition of sludge and composting products, pH of soil increased significantly (p<0.05) and ultimately tend to be neutral, and the inhibitory effect of VM-M on soil acidification was better than VM-S. Soil NO3 -concentration increased significantly with application of sludge and composting, and the NO3 -concentration of each treatment decreased gradually with time. Most of the NO3 -was absorbed by tomato plants, partially leached from the upper soil layer to the lower. Most of the NH4 + was oxidized to NO3 -and partially absorbed by plants. With the equal application of inorganic nitrogen, the promoting effect on the tomato growth was VM-M>VM-S>S-H. In addition, the excess application of nitrogen fertilizer from S-H than S-L did not promote the growth of tomato markedly (p<0.05). Compared with the control, N2O emission from soil was significantly improved by sludge or biomass composting (p<0.05). The N2O emission from all treatments were focused on the first 20 days after fertilization, and the emission of soil N2O was S-L (0.76 kg N2O-N ha -1 y -1 ))<VM-M (0.95 kg N2O-N ha -1 y -1

Anaerobic digestates from sewage sludge used as fertilizer on a poor alkaline sandy soil and on a peat substrate: Effects on tomato plants growth and on soil properties

“…As a corollary, biomass values were reflected by ANUE ones, which were higher than the ones reported in literature for tomato plants grown in pot under greenhouse conditions treated with a 10-folds higher nitrogen application (Wang et al, 2013). Improvement in terms of leaves number and chlorophyll content were less intense, but still higher than the examples reported in literature (Bakshi et al, 2019;Elloumi et al, 2016;He et al, 2016;Hossain et al, 2015).…”

The Effects of Fertilizer Type and Application Time on Soil Properties, Plant Traits, Yield and Quality of Tomato

“…However, studies with nitrogen application time are much fewer for tomatoes. Furthermore, most fertilization studies of tomato have generally only evaluated the effects on plants [6,31] or soil quality [32], solely. Some studies have evaluated both the plants and soil quality but with few parameters [7,33].…”