施肥对沙地樟子松人工林生长的影响

Effect of Fertilization on the Growth of Pinus sylvestris var.mongolica Plantation on Sand Land

通过对沙地樟子松人工林进行施肥试验,以其人为投入补充林地土壤肥力,对树木进行补充营养,促其速生丰产,缩短轮伐期,为樟子松人工林集约经营提供技术经验。试验结果表明,定性施肥以氮和过磷酸钙混施为好,定量配比为5∶3。施肥量幼龄林以0.40 kg.株-1、中龄林0.80 kg.株-1较适宜。

Through the fertilizer experiment on Pinus sylvestris var. mongolica plantation on sand land, supplying fertilizer with artificial plunge, supplying fertilizer on the trees, accelerating the characteristics fast-growing and high-yielding, shortening rotation period, experiences of intensive farming for Pinus sylvestris var. mongolica plantation were provided. The resuhs showed that mixed application with nitrogen and calcium superphosphate had better effect, and the quantitative alloca- tion was 5： 3. Fertilizer rate of young growth was 0.40 kg · per plant^-1 , and that of half-mature forest was 0.80 kg · per plant ^-1.