“784-1”是南开大学元素所于1978年初合成的化学激素。经黑龙江省24个单位计113个试验点次近两千亩的小区试验、中间试验和示范,增产效果显著而稳定。喷施每亩平均增产大豆8.6%;浸种,平均增产14.46%;拌种平均增产12.24%。1.“784-1”的生物活性据试验“784-1”对大豆的营养生长和生殖生长均有促进作用,可增大叶面积,促进光合产物的积累,有利根瘤的 “784-1” is a chemical hormone synthesized by elements of Nankai University in early 1978. By 24 units in Heilongjiang Province, 113 test points count nearly two thousand acres of plot test, intermediate test and demonstration, the yield increase effect is remarkable and stable. Spraying an average yield of 8.6% of soybean per acre; soaking, an average yield of 14.46%; seed dressing an average yield of 12.24%. 1. “784-1” biological activity According to the test “784-1” on soybean vegetative and reproductive growth have a role in promoting leaf area can be increased and promote the accumulation of photosynthetic products, nourishing nodules