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保德县东关镇王家应子村杨宝林,在县技术站农技人员指导下,1989年在1.5亩新修旱沙梯田上,种植地膜覆盖西瓜,总产4020公斤,收入2150元。杨宝林挖的西瓜穴,长、宽、深各50厘米,每穴施羊粪2.5公斤,碳酸氢铵和磷肥混合肥0.05公斤,选用了耐旱、抗病、中晚熟丰产品种新红宝,株距50厘米,行距200厘米,一膜一行。定苗时留了部分双苗,1.5亩地实留苗1200株。在瓜苗伸蔓期用1:1000的西瓜多元肥进行了叶面喷施,西瓜膨大期
Under the guidance of agricultural technicians in the county technical station, in 1989, 1.5 mu of newly built dry-land terraced fields were planted with plastic film covering watermelons with a total output of 4020 kilograms and a income of 2150 yuan. Yang Baolin digging watermelon hole, length, width and depth of 50 cm, sheep manure 2.5 kg per hole, ammonium bicarbonate and phosphate fertilizer 0.05 kg, the selection of a drought-resistant, disease-resistant, , 50 cm spacing, spacing of 200 cm, a film line. Dingmiao when leaving part of the double seedlings, 1.5 acres of land to stay Miao 1200. In the melon seedling extension period with 1: 1000 watermelon fertilizer for foliar application, watermelon swelling period