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从遭受冰雪灾害的巨桉实生人工林中,挑选出没有受冻迹象的巨桉优良单株,通过速生丰产性和耐寒性生理指标测定,选出最优巨桉植株,取其生长健壮、洁净且无病虫害的枝条为接穗,嫁接于巨桉幼树上保存。以1年生枝条作为材料,分别将经过0、250、500 mg/L NAA不同处理的插穗扦插于营养袋及直接扦插于土壤(黄壤)中,研究生根率、生根条数和生根长度的影响。结果表明,各处理巨桉插穗生根率、生根条数及生根长度,均为500 mg/L NAA>250 mg/L NAA>0 mg/L NAA,且直接扦插于土壤大于扦插于营养袋中,但扦插于营养袋和直接扦插于土壤中对巨桉插穗生根率和根长无显著影响。因此,在小规模造林时可选择直接扦插于土壤育苗,这种育苗方式相对较简便。
From the Eucalyptus grandis plantation suffering from ice and snow disasters, we selected the excellent individuals of Eucalyptus grandis without any sign of frost and selected the optimal Eucalyptus grandis plantlets for their fast growth, robustness and cleanliness And no pests and diseases of the branches for the scion, grafted on saplings young trees save. The 1-year-old shoots were used as materials to cut the cuttings of 0,250,500 mg / L NAA treatments into cuttings bags and directly cut into soil (yellow soil) to study the effects of rooting rate, rooting number and rooting length. The results showed that the rooting rate, rooting number and rooting length of E. grandis cuttings were all 500 mg / L NAA> 250 mg / L NAA> 0 mg / L NAA, and the direct cutting in soil was more than cutting in the nutrition bag, However, cuttings in the nutrition bags and direct cutting in the soil on the eucalyptus cuttings rooting rate and root length had no significant effect. Therefore, in small-scale afforestation can choose direct cutting in soil nursery, this nursery is relatively simple.