Sewage Sludge Amendment Combined with Green Manuring to a Coastal Mudflat Salt-Soil in Eastern China: Effects on Soil Physicochemical Properties and Maize Yield

Table 1

Basic chemical properties of the coastal mudflat salt-soil and sewage sludge used in this study.

Items	Mudflat soil	Sewage sludge
pH	9.02	6.32
Salinity ()	8.51	32.9
Organic carbon (g kg^−1)	1.97	216.2
Total N (N g kg^−1)	0.282	51.2
Total P (P g kg^−1)	0.507	5.51
Alkaline N (N mg kg^−1)	17.08	3440
Available P (P mg kg^−1)	6.99	813