湿地松切根育苗及其造林对比试验

Comparison Experiment for Planting and Seedling-raising of Pinus elliottii with Excised Roots

通过对湿地松不同切根处理、不同深度切根的育苗及其切根苗造林等试验，探讨幼苗切根对苗木质量、造林成活率及幼林生长的影响。试验表明：湿地松育苗采取芽苗截根移栽，8月底苗期切主根和侧根，切根深度9～11cm，苗木质量最优，造林成活率可迭98．7％，幼林生长各项指标表现最好，并提前郁闭成林，降低成本，经济效益显著。

Through the tests of different treatment on excised roots of Pinus elliottii, different depth of seeding-raising with excised roots of Pinus elliottii and planting with excised roots, the effect of seedling with excised roots on quality of seedling, forestation survival ratio and growth of stand is discussed. Results showed that adopting rooting conditioning and transplanting of eye for cultivating seedling of Pinus elliottii （conditioning top root and lateral root at the end of August with the excised roots depth within 9～11 cm） could get the best quality of seedlings. The survival ratio of forestation could reach 98.7%. Each growth indexes shows the best and crowned firstly. The cost could be induced and the beneficial effect is remarkably.