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对7年生杉木人工幼林进行3种不同施肥对比试验,其结果表明:施磷肥的效果最好,5年后立木蓄积生长量比对照区年均增长17.11 m~3/hm~2;磷肥+尿素混合施效果次之,年均立木蓄积生长量比对照区增加立木9.04 m~3/hm~2;施尿素对林木作用不大,仅比对照区年均立木蓄积生长量增长2.38 m~3/hm~2。
The results showed that phosphorus application was the best, and the growth volume of standing tree after five years was 17.11 m ~ 3 / hm ~ 2 more than that of the control area. Phosphate + urea Compared with the control plot, the average growth volume of standing trees increased by 9.04 m ~ 3 / hm ~ 2. However, urea application had little effect on forest trees, and the average annual growth volume of standing trees increased by 2.38 m 3 / hm ~ 2.