The experiment described in this study was conducted over five consecutive growing seasons (from 2016 to 2020) with biochar (at 0, 32, and 79 t/hm²) and PAM (at 0, 0.6, and 1.6 t/hm²) applications to study the effects of amendments on soil properties, rice photosynthesis, and rice yield in coastal saline land. Biochar and polyacrylamide (PAM) have been widely applied as soil amendments to enhance soil structure, but the interactive effects of biochar and PAM on rice growth are unclear. Hence, it is essential to choose suitable and efficient approaches to revitalize coastal saline soil quality and improve agricultural productivity. Poor soil quality is affected by salinity, which limits land productivity and sustainable agricultural development in coastal China.
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