Growth of Schima superba Seedlings in Different Terrains and Characteristics of Soil Nutrients

In order to explore the relationship between the growth of Schima superba seedlings and terrain and soil nutrients,in 2023,the growth indicators of Schima superba seedlings at different slope positions and orientations,as well as the nitrogen,phosphorus,potassium,and organic matter content in the soil,were measured and compared in the Xipi State-owned Forest Farm of Hua'an. The results showed that there were significant differences in the growth status and soil nutrients of Schima superba under different slope conditions. The average ground diameter,tree height,and crown width of Schima superba on the lower slope were 11.58 mm,89.64 cm and 59.24 cm,respectively,which were 12.87%,16.22% and 28.25% higher than those on the middle slope,26.56%,26.45% and 45.41% higher than those on the upper slope. The content of soil organic matter,total nitrogen,total potassium,alkaline nitrogen,and available potassium in different slope positions was highest in the downhill position,followed by the middle slope position,and the lowest in the uphill position. The growth of Schima superba planted on the southern slope was the best,with an average ground diameter,tree height,and crown width of 10.86 mm,80.90 cm,and 51.28 cm,respectively; and the nutrient content in the soil on the southern slope was the highest; the growth status of Schima superba in terms of ground diameter,tree height,and crown width was significantly positively correlated with total nitrogen,total potassium,alkaline nitrogen,available potassium and organic matter content,with a stronger correlation with organic matter.Therefore,in the construction of artificial Schima superba forests in the future,it is necessary to choose the downhill of the southern with higher organic matter and nitrogen and potassium content for afforestation,in order to improve the growth quality of Schima superba plantations.