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采用田间试验和数学分析方法、研究适合贵州种植的主要杂交高粱组合“抗4”的高产合理肥料用量。建立了反映高粱产量与N、K肥用量间关系的函数式。表明N肥时产量的影响较大。N、K肥料两者均不能盲目施用，应作适当的配合；同时用量的盲目增加，有碍产量的增加；获得500～525kg／亩的高梁产量．氮素实际用量为12～13kg／亩，K2O用量为11～12kg／亩。
A field experiment and mathematical analysis were conducted to study the high-yielding and rational fertilizer application of “Anti-4” in main hybrid sorghum planting suitable for planting in Guizhou. A functional formula reflecting the relationship between sorghum yield and N, K fertilizer consumption was established. Shows that the impact of N fertilizer production. Both N and K fertilizers can not be applied blindly and should be properly matched. At the same time, the blind increase of the dosage will hinder the increase of yield. The output of sorghum of 500-525 kg / mu will be obtained. The actual amount of nitrogen is 12 ~ 13kg / mu, K2O is 11 ~ 12kg / mu.