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中原地区早春利用“双膜覆盖”形式栽培早熟马铃薯、西瓜,秋季栽培大葱、马铃薯产量2.3×104～3.8×104kg/hm2,平均3.0×104kg/hm2,按平均1.50元/kg计,收入4.5×104元/hm2;早西瓜产量最低达4.5×104kg/hm2,按1.20元/kg计算,收入5.4×104元/hm2;大葱产量5.3×104kg/hm2,按1.00元
In the early spring in Central Plains, precocious potato and watermelon were cultivated in the form of “double-film mulching” and the green onions were cultivated in autumn. The yield of potato was 2.3 × 104 ~ 3.8 × 104kg / hm2 with an average of 3.0 × 104kg / hm2, 104 yuan / hm2; early watermelon production as low as 4.5 × 104kg / hm2, according to 1.20 yuan / kg basis, the income of 5.4 × 104 yuan / hm2; onion production 5.3 × 104kg / hm2, by 1.00 yuan