干旱荒漠区白刺人工林幼树生长特性研究

在干旱荒漠区选取白刺人工造林1~3年的幼树为研究对象,开展不同立地条件下白刺人工造林幼树生长特性的分析比较研究,结果表明:1)随栽植年限的增长,白刺人工造林1~3年幼树各项生长指标均呈增长趋势;白刺人工造林当年幼树生长较为缓慢,且容易出现干枝现象;2~3年后幼树随着年限的增长,其各项生长指标逐年增大。2)不同立地条件下,白刺3年幼树各项生长指标排序为:半固定沙丘草沙障地流动沙丘固定沙丘丘间地。3)半固定沙地和草沙障地适宜白刺人工造林,丘间地和固定沙地不适宜白刺人工造林。

Study on Growth Characteristics of Young Tree of Nitraria tangutorum Artificial Afforestation in Arid Desert Area

1～3 years of young tree of Nitraria tangutorum artificial afforestation in arid desert area was as study object and comparative study was carried out on analysis of growth characteristic of young tree of Nitraria tangutorum artificial afforestation in different site conditions,the results showed： 1） with the increase of planting period,growth indexes of 1～3 years of young tree of artificial afforestation of Nitraria tangutorum in the current year presented increasing trend;growth of young tree of Nitraria tangutorum artificial afforestation was relatively slow,and phenomenon of dry tree branch often occurred;2～3 years later,with the increase of planting period,all growth indexes have been increasing year by year.2） in different site conditions,sequence of growth index of 3 years of young tree of Nitraria tangutorum was as follows： semi-fixed sand dune 〉 mobile sand dune with straw checkerboard barriers 〉 mobile sand dune 〉 fixed sand dune 〉 inter-dunal depression.3） semi-fixed sand dune and mobile sand dune with straw checkerboard barriers were suitable for Nitraria tangutorum artificial afforestation,inter-dunal depression and fixed sand dune were not suitable for Nitraria tangutorum artificial afforestation.