鄂西北石漠化区困难立地一种造林技术的成效分析

Effect Analysis of a Afforestation Technique on Difficult site in RocKy Desertification Area of Northwest Hubei province

摘要:

结合鄂西北石漠化区困难立地造林需求,以保水剂、覆膜处理后的侧柏苗木为研究对象,在鄂西北山地营造侧柏幼 林,研究分析保水剂、覆膜处理对石漠化山地造林成效的影响o 结果表明:保水剂、覆膜处理后侧柏幼树地径生长差异达显著 水平(p<0. 05) 、高生长差异达极显著水平(p<0. 01);保水剂、覆膜处理后的 3 a生侧柏幼树地径主要集中于 14~22mm,平 均地径为 17. 32mm,较对照样地高出 5. 93%;幼树高度主要集中于 70~130cm,平均高度为 105. 17cm,较对照样地高出 55. 62%;造林成活率达 94. 5%,较对照样地高 39. 4个百分点,保存率达 91. 9%,较对照样地高 42. 3个百分点;保水剂、覆 膜处理后侧柏苗木造林可一次成林,同时降低造林成本约 16. 86%。

Abstract:

According to the needs of afforestation in difficult sites in rocky desertification area of Northwest Hubei prov- ince, the saplings of platycladus orientalis treated with water retaining agent and film mulching were taken as the research obJects, and the effects of water retaining agent and film mulching on afforestation effect of platycladus orientalis were studied and analyzed. The results showed that the ground diameter growth difference of platycladus orientalis saplings was significant (p< 0. 05) , and the height growth difference was extremely significant (p< 0. 01) . The ground diameter of 3- year-old platycladus orientalis saplings after water retaining agent and film mulching treatment was mainly 14~22 mm, with an average ground diameter of 17~32mm,5. 93% higher than that of the control plot. The height of saplings mainly concentrated in 70~130cm, the average height was 105. 17cm, 55. 62% higher than the control plot. the survival rate of afforestation was 94. 5%,39. 36 percentage points higher than the control plot, the preservation rate was 91. 9% , 42. 30 percentage points higher than the control plot. The platycladus orientalis saplings could be planted in one time after the treatment of water retaining agent and film mulching, and the afforestation cost was reduced by 16. 86% .