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莱州市地处渤海之滨莱州湾畔,土壤肥沃、物产丰富,素以,“科技之乡”、“产量大县”而闻名全国.然而,我市自1976年以来连续20年,年平均降雨量549.8mm,比前20年年平均降水减少142.72mm,而在此期间,由于工业用水的大量开采,高产农作物种植面积和复种指数的大幅度提高,用水量逐年增加,由于地下水处于长期超量开采的恶性循环状态,到1996年,海水入侵面积已达280km~2,已侵染粮田28万多亩,重度海侵区(地下水氯离子含量超过400mg/l)面积达12万亩以上,不宜再种植玉米、小麦,使过去的吨粮田一度沦为荒芜田,每年减产粮食0.75亿kg以上.为开发利用海侵地,改善海侵区农业生态环境,保持农业可持续发展,我们自80年代末以来,对海侵地进行多方位的试验、研究与探讨,在重度海侵区总结出以提
Laizhou is located in the coast of Laizhou Bay on the coast of Bohai Sea and is famous for its rich soil, abundant natural resources, “hometown of science and technology” and “big county of output.” However, the city has enjoyed average annual rainfall of 20 years since 1976 549.8mm, which is 142.72mm less than that of the previous 20 years. In the meantime, due to the large-scale exploitation of industrial water, the acreage and the multiple cropping index of high-yield crops have been greatly increased, the water consumption has been increasing year by year, Exploitation of the vicious circle of state, by 1996, seawater intrusion area has reached 280km ~ 2, has been affected 280,000 acres of grain fields, severe transgression zone (groundwater chloride ion content of more than 400mg / l) an area of 12 acres or more, It is not appropriate to plant corn and wheat so that the past tonal grain fields were once reduced to barren fields and the annual grain output will be reduced by more than 75 million kg. In order to exploit the transgression and improve the agro-ecological environment in coastal transboundary areas and maintain the sustainable development of agriculture, Since the late 1980s, many experiments, studies and discussions have been carried out on the transgressions,