杨树速生丰产技术的研究报告

Studies on the Techniques of Establishing Rapid Growth and High-yield Poplar Plantations

喀左县大凌河流域杨树速生丰产林栽培试验表明:杨树在壤土、沙壤土、地下水位1～3m 之间,土层厚度80cm 以上,能够形成高产林分。适于喀左县栽培的杨树良种为小黑杨、健杨、小(?)杨、赤峰杨、小青杨。建设高标准速生丰产林基地,可采用4点方形穴状整地和平行线调沟整地。初植密度以3m×5m 或4m×4m 为宜,培育大径材株行距可适当加大,亦可采用双行窄带配置造林。“三大、一深、培土、整冠”,林内种草压青,浸根造林,灌冻,化水等是林木速生丰产行之有效的栽培措施.

The rapid growth and high-yield poplar forest in Daling river valley has demonstrated that the most suitable site should have loam or sandy loam soil with ground water 1～3m below surface and the soil hickness no less than 80cm.The suitable species are Ponulus simonii,P.x simoni-gra P.robusta,P.x simopyramida and so on.The planting pits were rect-angularly arranged and the soil in the pit be well prepared.Primary pla-nting density is 3×5m or 4×5m,but the density must be increased prcperly when large diameter wood is needed.The effective techniques for cultivating poplar plantation with rapid growth and high yield also include large stock,large planting pit,large space,deeply planting,carthing up the trees,pruning the crown,grass cover in the wood,soaking roots with water befor planting,and irrigation.