不同技术措施对梭梭免灌造林成活率的影响

Effection of techniques on survival rates of Haloxyon Ammodendron afforestation

分别于2009年、2010年春季,在新疆古尔班通古特沙漠南缘选取了迎风坡、丘间平地、背风坡作为研究样地,采用不同的技术措施(保水剂、生根粉和液体地膜)进行梭梭免灌造林试验,以确定这些技术措施是否能有效提高古尔班通古特沙漠地区免灌造林成活率。结果表明:实施这些措施后,不同立地条件之间梭梭免灌造林成活率存在显著差异;水分是限制古尔班通古特沙漠梭梭免灌造林成活的关键因子,土壤理化性质对梭梭免灌造林成活率影响不显著;三种造林措施对梭梭免灌造林成活率有一定作用,但效果不显著。

The exploitation of resources and an increase in civil engineering projects in Gurbantunggut Desert,the largest fixed and semi-fixed sandy desert in China,has caused environmental disturbance to the fragile desert eco-system.The soil moisture is the primary factor that affects the afforestation in Gurbantunggut Desert,especially in spring.The planting techniques were examined in Gurbantunggut Desert in April,2009.The results showed that the survival rates of Haloxyon ammodendron on shady slope,sunny slope and flat were 53.66%,14.42% and 4.73% respectively.The unirrigated afforestation affects on shady slope of Gurbantunggut Desert were well.There are three techniques for forestation,super absorbent polymer,rooting powder and water conservation membrane,which are effective in some areas,even in Gurbantunggut Desert where the water condition is poor.Among the affects of these techniques,water conservation membrane is the best,the next is rooting powder,then super absorbent polymer.