山东省即墨市国家安全局姜沙奎同志经过4年的试验示范,研究总结出大豆高产栽培新技术-《大豆直播断根摘芯高产栽培模式》。1993年在即墨市卫星农场进行夏播试验(鲁豆4号生长期为100天),8亩大豆平均亩产350公斤,比传统栽培亩增200公斤,亩增经济效益400元。其操作方法是:将大豆直播入大田,行距50厘米左右,穴距8～20厘米,穴播2～3粒。播种后第8～9天进行大田摘芯,第10～11天大田断根。断根时,用一薄铁铲在豆苗地下深约5厘米处铲断主根。铁铲斜插进,原位拔出,避免使豆苗移位而伤害侧根,断根的位置应掌握在豆苗茎下2.5厘米左右,过深或过浅 After four years of experiment and demonstration, Comrade Jiang Shagui, State Security Administration of Jimo City, Shandong Province, summed up a new high-yielding cultivation technique for soybean - “Soybean direct seeding with roots and high yielding cultivation mode”. Summer sowing test was conducted in Satellite Farm of Jimo City in 1993 (100 days for the growth of Luding No.4). The average mu yield of 8 mu of soybean was 350 kilograms, 200 kilograms more than that of traditional cultivation, and the economic benefit of mu was increased by 400 yuan. The method of operation is: Soybean live into the field, about 50 cm spacing, hole spacing of 8 to 20 cm, 2 to 3 points broadcast. 8 to 9 days after sowing Daejeon pick core, 10 to 11 days off the field. When cutting roots, shovel the main root with a thin shovel in the bean sprouts underground about 5 cm. Iron shovel inserted obliquely, pull out in situ, to avoid shifting the pea seedlings and damage the lateral roots, root position should be seized in the pea seedling stem about 2.5 cm, too deep or too shallow