施肥对杉木幼林生长效益和肥料释放特性的影响初步研究

为探讨施肥对杉木幼林生长以及肥料释放特性的影响,在福建省顺昌县洋口国有林场麻溪工区进行试验.结果表明:施肥处理与对照相比,施肥1年后的树高当年增长量为3％～17％,胸径当年增长量为1％～10％,施肥2年后树高的当年增长量为9％～35％,胸径当年增长量为16％～62％.随着杉木幼林的生长,与施肥前相比,施肥处理土壤中有机质、全钾含量大体上呈逐年降低的趋势,而全氮、全磷、水解氮、速效钾含量先增加后降低.此外,袋控肥料的深层施肥可有利于肥料中氮素和磷素的释放,可提高肥料的长期效益.

Preliminary study about the effects of fertilization on growth of young Chinese fir and release characteristics of fertilizer

To search the effects of fertilization on the growth of young Chinese fir plantation and the release characteristics of fertilizer, the sample plot was set in Administration Bureau of State Forest Farms of Fujian Province. The results showed that, compared with control, the growth of tree height and diameter at breast height (DBH) of fertilization treatments respectively increased 3%~17% and 1%~10% in the first year after fertilization, and respectively increased 9%~ 35% and 16%~62% in the second year after fertilization. With the growth of Chinese fir, the content of organic matter and total potassium in soil of fertilization treatments generally had a decreasing trend every year, while the content of total nitrogen, total phosphorus, hydrolyzable nitrogen, available potassium first increased and then decreased after fertilization.In addition, deep fertilization of Bag-Controlled Fertilizer was conducive to the release of nitrogen and phosphorus and to improve fertilizer efficiency in long-term.