不同品种镁肥对水稻产量及稻田土壤环境的影响

Effects of Different Varieties of Magnesium Fertilizer on the Rice Yield and Paddy Soil Environment

为筛选经济、高效、适用的镁肥,实现水稻稳产增收与绿色可持续目标,2021年在上杭县才溪镇开展不同品种镁肥对水稻产量和稻田土壤环境的影响试验,通过设置常规施肥(对照)、七水硫酸镁、农用氢氧化镁、钙镁复合素等4个处理,分析各处理对水稻产量、土壤pH和交换性镁的影响。结果表明:施用不同品种镁肥,水稻产量增加252~645 kg·hm^(−2)、增幅3.0%~7.8%,土壤pH提高0.18~0.29,交换性镁增加0.09~0.11 coml·kg^(−1)。综合分析,在上杭县水稻田施用农用氢氧化镁效果最佳,水稻产量最高,达到8965.5 kg·hm^(−2)、增幅7.8%,增收1888.8元·hm^(−2);稻田土壤pH提高0.24,土壤交换性镁增加0.1 coml·kg^(−1),可在当地进一步示范推广应用。

In order to screen the economical,efficient,and applicable magnesium fertilizer,and achieve the goal of stable yield,income increase and green sustainability of rice,a field experiment was conducted in Caixi Town of Shanghang County in 2021 in this study,thus to examine the effect of different Mg fertilizer types on the rice yield and soil environment of paddy field.The effects of four treatments on rice yield,soil pH and exchangeable magnesium were analyzed by setting up the four treatments:control,magnesium sulfate heptahydrate,agricultural magnesium hydroxide and calcium magnesium complexins.The results showed that the application of different varieties of magnesium fertilizer could increase the rice yield by 252−645 kg·hm^(−2),with an increase of 3.0%−7.8%.In addition,the soil pH value increased by 0.18−0.29,and the exchangeable magnesium increased by 0.09−0.11 cmol·kg^(−1).In general,the application of agricultural magnesium hydroxide in the paddy fields in Shanghang County had the best effect,with the highest rice yield of 8965.5 kg·hm−2,representing a 7.8%increase compared to the CK,and resulting in an additional income of 1888.8 yuan·hm^(−2).Furthermore,the paddy soil pH increased by 0.24 and the exchangeable magnesium in soil increased by 0.1 cmol·kg^(−1),which deserved the further demonstration,promotion and application in the local area.