【摘要】 通过不同施钾水平对玉米干物质生产及籽粒产量影响研究,结果表明,玉米叶、叶鞘干物质重与施用钾肥有关,在乳熟期达到最大值,蜡熟期叶、叶鞘干物质重均呈下降趋势;茎秆和地上部干物质总重量与钾肥施用水平有关,干物重随生育进程推进而增加;钾肥用量在75~225 kg/hm2,玉米产量随钾肥用量增加而提高,当钾肥用量达300 kg/hm2水平时玉米产量则下降。在试验土壤肥力条件下,225 kg/hm2施钾水平玉米产量最高。更多还原

【Abstract】 The effect of different K fertilizer levels on dry matter production and main yield components of maize was studied.The results showed that dry matter weight was related with K fertilizer application rate in the leaves and sheaths of maize,it achieved the maximum in the milk stage,and it had the decrease current in the mature stage.The total dry matter weight was related with K fertilizer dosage,and it increased with growing stage.The yield of maize increased from 75～225 kg/hm2 K fertilizer level,and it descended in 300 kg/hm2 K fertilizer level.The yield of maize was the highest in 225 kg/hm2 K fertilizer level under the experimental conditions of soil fertility.更多还原