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四倍体刺槐保持了刺槐耐旱、耐瘠薄和耐盐碱优点,具有叶片肥大、生长迅速等特性,是我国西部地区退耕林还草及生态环境建设的首选造林树种之一。 一、四倍体刺槐的特性 四倍体刺槐可分为饲料型和速生用材型两个类型共五个无性系。其中k1为大叶饲料型,k2为大叶饲料灌木无刺型,k3为速生矿柱型,k4为速生板材型,k5为速生无刺用材型。饲料型萌芽和和成枝力都强,枝叶繁茂,枝无刺或有少量小刺,叶肥大且厚实,耐修剪。叶片及幼嫩枝条中粗蛋白质含量高,营养丰富,非常适合作为动物饲料适宜应造饲料林及薪炭林等。速生用材型萌芽力弱而成枝力强,树干通直圆满,生长迅速,尖削度小,出材率高,抗逆性强。苗木栽植当年高度可达2.5～3.0cm,地径2.
Tetraploid Robinia pseudoacacia is one of the preferred afforestation species for returning farmland to forestland and ecological environment in west China because it maintains the advantages of drought resistance, infertile infertility and salt-tolerance of R. pseudoacacia with leaf hypertrophy and rapid growth. First, the characteristics of tetraploid black locust Tetraploid Robinia can be divided into two types of feed and fast-growing timber a total of five clones. Among them, k1 is big-leaf feed type, k2 is big-leaf feed shrub without thorns type, k3 is fast-growing ore column type, k4 is fast-growing plate type, and k5 is fast-growing non-stodgy material type. Feed germination and branching force are strong, lush foliage, spines or a small amount of thorns, large and thick leaves, resistant to pruning. The crude protein content of leaves and young shoots is high and nutrient-rich, which is very suitable for animal feed as feed forest and firewood forest. Fast-growing material type germination is weak and branch strong, trunk straight round, rapid growth, sharp taper, a high yield, strong resistance. Seedlings planted the year up to 2.5 ~ 3.0cm, diameter 2.