Effects of boron fertilization in the nursery or after planting on the performance of Norway spruce seedlings on boron-poor sites

摘要: Many forest soils in Finland are poor boron (B), especially otherwise fertile (nitrogen-rich) and peatlands. Boron deficiency causes growth disorders affecting young Norway spruce (Picea abies) stands. We studied the effects of B fertilization on morphology seedlings. was applied a nursery and/or after planting nursery-field reforestation site, both known to be low B. The increased foliar concentration linear relationship amount fertilizer but did not affect seedling morphology. Even highest (approx. 400 mg kg−1) have harmful Therefore, can used for increasing storage needles. at first season. Afterward, decreased remained above limit least 4–5 years. In B-poor nursery-field, nonfertilized seedlings began produce multiple leaders second year. On fewer were found. At height stimulated by planting. conclusion, 200–400 m−2 (2–4 kg ha−1) has longer-lasting status than does nursery, improve quality years sites.