乌江峡谷瘠薄山地造林试验初报

在乌江峡谷瘠薄山地的典型地段设立了两个造林试验点,采用不同的种植穴土壤覆盖保水措施进行了夹竹桃、柏木、刺桐、黄葛树、黄花槐5个树种的植苗造林试验,结果表明:不同的种植穴覆盖措施对不同树种当年的植苗造林成活率及成活植株3年生时的保存率均产生显著影响,地膜覆盖的当年植苗成活率最高,而杂草覆盖保存率最高。种植穴经用杂草覆盖后,5个树种3年生幼树期的高生长都存在一定优势,不同覆盖措施对5个树种3年生幼树期的地径生长影响不大。试验结果表明:刺桐和黄花槐较适宜用作乌江峡谷瘠薄山地的造林树种。

A Preliminary Report on Silvicultural Experiment on Infertile Mountainous Areas of Wujiang Valley

Silvicultural experiment of Nerium indicum,Cupressus funebris,Erythria variegata,Ficus virens and Cassia sp.were conducted at two experimental sites located at infertile mountainous areas of Wujiang valley by using different coverage measure for water-retaining.The experimental results show that different coverage measures produce significant effects on survival rate and preservation rate three years after planting.The survival rate of seedlings treated with plastic film mulching is higher than grass mulching and without coverage.The preservation of seedlings treated with grass mulching is higher than other two treatments.The experimental results also indicate that with the coverage of grass,the height growth of five tested species all show some advantages.The effects of different mulching treatments do not have significant influences on basal diameter growth.