it was found out that dried soil layer in loess plateau is caused by the relative dry climate and affect the formation of the natural syntheses directly.
结论认为,土壤干层是黄土高原气候相对干旱的结果,表现出明显的地带性特征并对植被生长与分布起到重要控制作用。
so, studying and solving problems about dried soil layer have become the urgent task for the vegetation construction in the loess plateau.
因此,研究和解决土壤干层问题已成为黄土高原植被建设的迫切任务。
the study reveals that the formation of dried soil layer is mainly caused by natural factors due to the reduction of precipitation and gravitational water.
研究表明,土壤干层的形成主要是自然原因造成的,是降水量少决定的重力水带分布深度小引起的。
the research shows that the influx depth of gravity water in soil can indicate the existence of dried soil layer and the degree it developed, which is the key factor to decide the kind of vegetation.
已有的研究表明,土壤中重力水的入渗深度能够指示土壤干层的有无和发育强弱,是决定植被类型的最主要和最关键的因素。
meanwhile the significance of solving problems about dried soil layer is discussed.
同时,研究指出了解决土壤干层问题的意义。