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在潴育型的灰泥田上进行连续三年施用硫酸钾镁的水稻定位试验。结果表明:在氮磷肥基础上配施不同钾肥品种或单施进口复合肥的稻谷产量高低顺序为硫酸钾镁肥>48%进口复合肥>氯化钾=硫酸钾,三年平均产量分别较对照增产7.0%、5.0%、4.3%、4.3%,施用硫酸钾镁的水稻产量增幅呈逐年增加趋势。与其它钾肥品种相比,水稻施用硫酸钾镁肥,增加了分蘖期的分蘖数,提高了分蘖期与孕穗期的叶片叶绿素含量;收获期籽粒氮磷养分累积吸收量更高,经济效益更好。
Paddy field application of potassium and magnesium in paddy field for three consecutive years of rice positioning test. The results showed that the order of yield of paddy with different potassium fertilizers or compound fertilizers with single application of NPK was> 48% of imported compound fertilizer> potassium chloride = potassium sulfate, the average yield of three years was respectively The increase of yield of rice with potassium magnesium sulfate increased by 7.0%, 5.0%, 4.3% and 4.3% respectively. Compared with other varieties of potash, the application of potassium and magnesium sulfate to rice increased the tillering number at tillering stage and increased the leaf chlorophyll content at the tillering stage and booting stage. The cumulative absorption of nitrogen and phosphorus in grain at harvest stage was better and the economic benefit was better .