煤矸石山不同施肥处理对3个树种生长量的影响

Effect of Different Fertilization Treatments to Three Tree Species Growth Mass on Gangue Hill

在煤矸石山地,通过对树木进行施肥处理来研究不同施肥处理对白榆、臭椿和沙棘等3个树种生长量的影响,结果表明:对树木施肥1年后,地径和树高生长速度要快于对照,以施过磷酸钙100g·株-1处理效果最好;但施肥2年后,各处理间的差异不显著。这说明施肥能够促进矿区废弃地人工幼林的生长,并且磷肥效果好于氮肥,但速效化学肥料极易被淋溶,第2年化肥已经消耗殆尽,所以在矿区废弃地对幼树施肥,应少量、多次使用速效化肥或选用一些分解缓慢的长效肥料。

The growth mass of Ulmus pumila ,A ilanthus altissima , H ip pophae rhamnoides three tree varieties on gangue hill area were determined under different forest fertilization treatments .The results showed that diameter and height growth rates of treatment groups were faster than those of control after 1 year fertilization ,with the best effect under 100g calcium superphosphate per plant ;but the difference between each treatment was not significant after two years fertilization .This shows that fertilization can promote the growth of young plantation on the aban-doned mining wasteland ,which phosphatic fertilizer is better than nitrogen fertilizer ,but fast-acting chemical fertil-izers can easily be leached ,and depleted at the first two years utilization ,so fast-acting fertilizers should be used with a small amount ,and repeated ,or controlled availability fertilizers with slow decomposition be adopted as sap-lings fertilization in the abandoned mining area .