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众所周知,用材林的无性繁殖与有性繁殖比较,有许多遗传优势。许多树种如娜威云杉、辐射松,东方白松等的大群扦插繁殖是完全可行的。许多试验证明,湿地松、火炬松的大群扦插繁殖比上述树种难度大。我们的试验目的在于评估湿地松、火炬松幼树插穗生根的潜势。方法试验地设在布鲁斯威克果浆公司附近的一块耕作地,1987年经耙耕后整理为3个4×30英尺的试验小区,圃地土壤为Norfolk土系,上层为排水性良好的壤质砂土,母树为1年生幼树,提供如下三
As we all know, timber forest clonal propagation and sexual reproduction, there are many genetic advantages. Many species of trees such as Nawei spruce, Pinus radiata, Oriental white pine and other large-scale cutting propagation is entirely feasible. Many experiments show that the large-scale cutting propagation of Pinus elliottii and Pinus taeda is more difficult than the above-mentioned species. The purpose of our experiment is to evaluate the potential for rooting of young leaves of Pinus elliottii and Pinus taeda. The method was experimentally located on a plot of land near Brewster’s Berry Company. After harrowing in 1987, the plot was tossed into three 4 × 30-ft plots. The soil in the plot was Norfolk soil system, and the upper layer was well-drained soil Quality sand, the mother tree is a one-year-old saplings, providing the following three