在伟大领袖毛主席关于“备战、备荒、为人民”的伟大战略方针指引下,西北农学院于一九七○年土法试制成新植物激素——增产灵。通过在8个县13个点的药效试验证明:增产灵可使棉花较大幅度增产,一般可使棉花增产11～30％左右,最高可达50％。用增产灵处理棉籽和棉株,可促进发芽,普遍使棉花生长良好,叶茂色绿,植株健壮,低矮紧 Under the guidance of Chairman Mao’s great strategic principle of “preparing for war, preparing for war and for the people,” the Northwestern Agricultural College piloted the indigenous phytohormones-Zeng Ling-Ling in 1970. Through the efficacy test in 13 counties in 8 counties, it is proved that ZSP can increase cotton production by a large margin and generally increase cotton output by about 11% to 30% and up to 50%. Spray cotton seed and cotton plants with Zeng Ling, can promote germination, generally make cotton grow well, leaf green, plant robust, low tight