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代县阳明堡公社有2万亩耕地属茂河灌区,地面平整,土层深厚,肥力较好,灌溉方便。过去春小麦亩产只有200来斤。1981年试验春小麦和葵花套种成功。1983年套种6,834亩,占小麦播种面积的89%。在伏天无雨的情况下,平均亩产小麦399斤,葵花180斤,每亩产值201元。主要栽培技术如下。1.套种方式实践证明,套种比例以3:1为宜,即3尺一带,每隔3行小麦,点种1行葵花。小麦播幅2.5寸,行距7寸;葵花行距2.8尺,株距1.8尺,每亩1,200株。小麦占地3/4,葵花占地1/4。前期麦与麦之间隔着葵花占地的大背,通风透光好,每3行就有2行边行优势。葵花虽占地1/4,
County Yangming Fort commune has 2 million mu of cultivated land is Mao River Irrigation District, the ground level, deep soil, better fertility, irrigation convenience. In the past spring wheat mu only 200 pounds. 1981 experiment Spring wheat and sunflower interplanting success. In 1983, 6,834 mu were planted, accounting for 89% of the sown area of wheat. In the case of no rain, the average yield of 399 kg of wheat per mu, sunflower 180 pounds, the output value of 201 yuan per mu. The main cultivation techniques are as follows. 1. Intercalation Practice has proved that intercalation ratio of 3: 1 is appropriate, that is, 3 feet in a row, every 3 rows of wheat, planting a row of sunflower. Wheat sow 2.5-inch, spacing 7 inches; sunflower spacing of 2.8 feet, spacing 1.8 feet, 1,200 acres per acre. Wheat occupies 3/4, sunflower occupies 1/4. Early wheat and wheat between the sunflower area of the back, well ventilated, light, every 3 rows have 2 rows side line advantage. Although the sunflower occupies 1/4,