1974年,我们在七队搞了杂交高粱不同口肥对比试验。结果表明,杂交高粱施用磷肥,增产效果显著,氮磷混合做口肥,肥效更大。 In 1974, we carried out in seven hybrid sorghum cross-fertilization test. The results showed that the application of phosphate fertilizer on hybrid sorghum increased yield significantly, and the combination of nitrogen and phosphorus was used as a staple fertilizer with greater fertilizer efficiency.