毛乌素沙地活沙障建植影响因子分析

Analysis of Impacting Factors for Establishing Living Sand Barriers in Mu Us Sandy Land

本文通过对影响毛乌素沙地蒙古莸、叉子圆柏、北沙柳、紫穗槐等活沙障建植的主要环境因子(风向、风速、气温、降雨、土壤温度、土壤含水量等)进行研究,探讨影响建植的因子变化特征及适宜的建植期。结果表明:毛乌素沙地主风向为NW-NNW和SE-SSE,因此活沙障种植带的方向应在SW-WSW至NE-ENE范围内选择;活沙障的建植时间应确定为气温回暖、土壤解融、产生有效降雨之后,且避开起沙风、大风频率较高和易出现高温的时间,尽可能地避免风沙对活沙障苗木造成伤害。经过多因子统计分析,毛乌素沙地活沙障建植的适宜时期为5月20日至6月10日。

In this paper,based on the research of the main environmental factors(wind direction,wind speed,air temperature,rainfall,soil temperature,soil water content,etc.)affecting the construction of living sand barriers in Mu Us Sandy Land with the plantation such as Caryopteris mongholica,Juniperus sabina,Salix psammophila and Amorpha fruticosa,the characteristics of the factors influencing the construction and the suitable planting period were discussed.The results showed that the main wind directions of Mu Us Sandy Land were NW-NNW and SE-SSE,so the planting direction of living sand barrier should be selected from SW-WSW to NE-ENE.The time for establishing the living sand barrier should be after temperature warming,soil melting and effective rainfall,which should avoid the time of sand-driving wind,high wind frequency and high temperature,so as to keep away from the damage to the seedlings of living sand barrier caused by wind as much as possible.According to the multi-factor statistical analysis,the suitable period for the construction of living sand barriers in Mu Us Sandy land is from May 20 to June 10.