岷江上游干旱河谷地区不同覆盖处理对几种苗木生长的影响

Effect of Different Mulching Treatments on Growth of Several Trees species in Arid Valley Areas

为了提高岷江干旱河谷地区造林成活率和保存率,开展了乡土树种岷江柏、刺槐、榆树以及引进树种辐射松等4个树种造林试验研究,对黑地膜、白地膜、石块覆盖以及不加覆盖物(对照)4种处理方式的成活情况与生长情况等进行观察分析。结果表明:从处理方式上看,表现为覆盖处理均较对照好。其中以白地膜处理下表现最好,成活率达83.25%,保存率达79.18%;黑地膜表现次之,成活率与保存率分别为80.75%和76.75%;石块处理下,分别为75.50%和71.05%;而对照仅为65.5%和54.27%。从不同树种的生长表现上看,岷江柏表现最好,成活率与保存率分别达到92.00%和88.00%;榆树较好,二者分别达到91.67%和85.67%;刺槐次之,二者分别为81.67%和74.67%;辐射松最差,成活率仅为54.20%,保持率仅为54.03%。

In order to improve the forest trees＇s survival rate in arid valley areas of the Minjiang River, a study was made on the growth of Cupressus chengiana、 Robinia pseudoacacia, Ulrnus purnila L. and Pinus radiata which were treated with different mulching treatments. The results from survival rate and saving rate have shown that all treatments are better than the control, among which the white membrane treatment is the best whose survival rate and saving rate are 83.25% and 79.18% respectively; the black membrane treatment takes the second place which shows 80.75 % and 76.75 % respectively in survival and sowing rates,the stone treatment shows 75.5 % and 71.05% respectively, and the control shows only 65.50 % and 54.27 % respectively. From the status of growth it can be seen that Cupressus chengiana shows the best survival rate and saving rates which are 92.00% and 88.00%, Ulrnus purnila L. is better whose survival and saving rates are 91.67% and 85.67% respectively, then it is Robinia pseudoacacia whose survival and saving rates are 81.67% and 74.67 %, but Pinus radiata＇s survival and saving rates are 54.20 % and 54.03 % respectively.