乐亭县是一个果菜生产大县,塑料大棚甜瓜栽培面积较大,到2007年,全县塑料大棚甜瓜面积达6万多亩,平均亩效益0.9万元,全县种植甜瓜年总产值超过5亿元,占全县蔬菜总产值的30%,设施甜瓜生产已成为 Laoting County is a fruit and vegetable production counties, large plastic melon cultivation area, by 2007, the county melon plastic shed area of ​​60,000 acres, the average efficiency of 9,000 yuan per mu, the county planted melons in the total output value of more than 5 100 million yuan, accounting for 30% of the county vegetable output value, facilities melon production has become