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不同密度4年生大叶相思更新试验,经3年萌芽生长观测,结果表明:不同密度3年生的萌芽林与原林分(未更新的林分,下同)径、高生长相接近,而材积和生物量(鲜重,下同)生长,萌芽林则比原林分分别增长3.11 m~3/ha和6.31 t/ha。且萌芽林林分材积和生物量生长均比原林分同期生长量(3年)显著提高,1.0m×1.5m 密度的林分材积和生物量分别提高44.7％和133.8％,1.0m×2.0m 的分别提高40.8％和63.9％,1.5m×1.5m 的分别提高43.0％和80.6％。作为薪炭林经营的大叶相思造林密度以1.0m×1.5m为宜,并且4年生时采伐更新其萌芽率和萌芽条数最高,分别达到93.9％和平均每桩萌条11.6条。
The results showed that the germination of three-year-old germinated forest with different densities was close to that of the original stand (un-renewed stand, the same below), and the height and volume were similar Biomass (fresh weight, the same below) growth, sprouting forest than the original stand were increased 3.11 m ~ 3 / ha and 6.31 t / ha. The stand volume and biomass of sprouting stand increased significantly than that of the same period (3 years). The stand volume and biomass of 1.0m × 1.5m stand increased by 44.7% and 133.8%, respectively, and 1.0m × 2.0 m increased by 40.8% and 63.9%, respectively, and increased by 43.0% and 80.6% respectively over 1.5m × 1.5m. The plantation density of Acacia auriculiformis was 1.0m × 1.5m, and the highest germination percentage and germination number were obtained when cutting and renewing in 4-year-old, reaching 93.9% and 11.6 respectively.