Abstract: To elucidate the growth characteristics of various Casuarina equisetifolia landscape types and their impacts on soil nutrient dynamics,as well as to assess their potential for ecological landscaping and soil fertility enhancement,this study examined six distinct landscape types through integrated field surveys and laboratory analyses. Key findings revealed:①Significant variations were observed in soil C,N and P contents and their stoichiometric ratios among landscape types. The ‘Ruyi Feng’ type exhibited the highest total C content(10. 76 g·kg^-1),while ‘Jixiang Long’ recorded the highest total N(1. 13 g·kg^-1). Total P was elevated in ‘ Ping'an’ ‘Fada’ and ‘Ruyi Feng’ averaging 248. 12,237. 02 and 254. 59 mg·kg^-1,respectively. ②Available N,P and potassium(K)levels also varied significantly. ‘Ruyi Feng’ and ‘Jixiang Long’ displayed higher alkali-hydrolyzable N(48. 60 and 39. 94 mg·kg^-1,respectively)and ammonium-N(4. 29 and 3. 77 mg·kg^-1),though nitrate-N remained low(0. 29 and 0. 40 mg·kg^-1). Notably, ‘Jixiang Long’ showed superior capacity for enhancing soil P and K availability. ③‘Xingwang’ ‘Ruyi Feng’ and ‘ Jixiang Long’ outperformed other types in tree height and diameter at breast height,whereas ‘ Ping'an’ excelled in canopy width. In conclusion, landscape types of C. equisetifolia diverge in growth traits and soil nutrient enrichment potential. Certain cultivars,particularly ‘ Jixiang Long’ combine high ornamental value with ecological benefits,underscoring their suitability for ecological restoration and landscape forestry.