多年来,奥大利亚一直在沿海沙丘上种植植物以进行固沙.种植得最多的是马兰草.在新南威尔士,土壤保持局选用了直径约为2—5cm的马兰草丛.这主要是基于经济上的原因,而不是在进行研究后对下述问题作出的较准确的答案:“为在最短的时间内使植物生长得最好,应选用多大的草丛?” For many years, Australia has been planting plants on sandy sand dunes for sand fixation, and Malan grass has been most cultivated. In New South Wales, the Soil Conservation Agency uses Malan grass with a diameter of about 2-5 cm, mainly based on economy Rather than a more accurate answer to the following question after conducting the study: “To what extent should we choose for the best plant growth in the shortest possible time?”