Abstract:

To investigate the effects of different soil conditioners on the yield and quality of water bamboo grown in coastal saline-alkali soil，a soil improvement experiment was conducted using 75% high-purity humic acid，natural gypsum powder，and “Shidijia” saline-alkali soil conditioner to reduce soil salinity and alkalinity. The results showed that after planting water bamboo，soil pH value and water-soluble salt content decreased compared with those before planting，while the contents of organic matter，total nitrogen，available phosphorus，and available manganese increased to varying degrees. All three soil conditioners could improve the saline-alkali soil environment and increase the yield of water bamboo to a certain extent. Moreover，higher application rates of conditioners led to greater reductions in soil pH value and water-soluble salt content，indicating more pronounced amelioration of saline-alkali conditions. Among the treatments，The treatments with 4.2 kg of “Shidijia” saline-alkali soil conditioner and 390 kg of natural gypsum powder per 667 m2 were particularly effective in reducing soil salinity and alkalinity and increasing soil available nutrients. The water bamboo plants grown under these treatments were tall，exhibited strong disease resistance，and showed higher hull weight，net weight，and yield，suggesting their suitability for promotion and application in saline-alkali areas.

Key words: soil conditioner, saline-alkali soil, soil improvement, water bamboo, yield, quality