一年生农作物与多年生沙生植物混播网格的固沙作用

传统的治沙措施用于治理风蚀沙地或效果较差，或成本较大。用1年生农作物与多年生沙生植物的种子混播做固沙网格，当年便可以起到固沙作用，保证了多年生植物的幼苗成活与生长，使风蚀沙地可以1次治理，长期有效；而且成本低。对于落沙坡及自然环境条件较好的起沙坑，用农作物单播做网格，在网格中间穴播、移栽或插条多年生植物，可以进一步减少多年生植物种子的用量。仅用农作物做网格，成本低，可维持两年左右的时间，后续利用灵活。

SAND FIXATION EFFECT OF ANNUAL CROPS MIXED WITH PERENNIAL AMMODYTE CROSS-LINE

Planting annual crop, such as wheat, millet and naked oat etc, mixed with perennial sand plant to form fixing sand cross-line (plant network) has a good, fast and perennial sand fixation effect and low cost, especially for the eroded area. In the sand falling area and light eroded area with a good nature condition,the annual crop was used to form cross line only, and pit planting some perennial plants in the square around by the crop cross line or not both get a good sand control effect. The annual crops have the nature of fast growth, great root system, cheap seed and high planted dense etc. Planting those crops as sand fixation cross line has a quick sand fixation effect and low cost. The effect can last for about 2 years. And it is easy for further use of the fixed sand land.