湖北林业科技

In order to compare the growth and biomass changes of Pinus tabuliformis seedlings in northern China under different nitrogen levels, this study was carried out. The results showed that when nitrogen application was 10 nmol·L?1, the seedling was the highest, which was 1.44 m. When nitrogen application was 20 nmol·L?1, the basal diameter of Pinus tabuliformis seedling was the thickest, which was 37.45 mm; The root biomass of the treatment without nitrogen fertilizer was 120.21 g; With the increase of concentration, the stem biomass decreased gradually. The stem biomass treated with 5 nmol·L?1 was the largest, 192.41 g, while the leaf biomass treated with 10 nmol·L?1 nitrogen was the largest, 37.13 g.