西南农业学报2025，Vol.38Issue(8)：1616-1623,8.DOI:10.16213/j.cnki.scjas.2025.8.006
磷尾矿基钙镁缓释肥料对小白菜的应用效果研究
Application effect of phosphate tailings based calcium magnesium slow-release fertilizer on pak choi
摘要
Abstract
[Objective]In response to the current situation in southern China where calcium and magnesium deficiencies in soils severely af-fect the quality and yield of pak choi,the study applies phosphorus tailings-based slow-release calcium and magnesium fertilizers to acidic soils in the southern region.The aim is to effectively supplement calcium and magnesium nutrients for pak choi and the soil,thereby improving soil fertility,enhancing the growth indicators,quality,and yield of pak choi.[Method]Phosphorus tailings were used as the main raw materi-als to prepare phosphorus tailings based calcium magnesium slow-release fertilizers.Different fertilization treatments were designed through leaching experiments and field experiments to evaluate nutrient release characteristics and agronomic effects.[Result]Based on the release time of leached nutrients combined with the pH of the leachate and the accumulation of calcium and magnesium,the pH of the leachate trea-ted with CP showed a gradually increasing trend,rising from the initial 5.04 to 6.65,an increase of 1.61 units.At the end of 50 days,the ac-cumulation of calcium and magnesium in CP treatment was between FMP and PT treatment,with a cumulative release of 127.0 mg and 67.0 mg of calcium and magnesium,respectively.The results of field experiments showed that in acidic soils in southern China,the application of phosphate tailings based calcium magnesium slow-release fertilizer significantly increased the plant height of pak choi by 1.44 times,the ball width of pak choi by 33.0％,and significantly increased the calcium and magnesium content and absorption of pak choi plants compared to not applying moderate element fertilizers.The application of phosphate tailings based calcium magnesium slow-release fertilizer increased the exchangeable calcium and magnesium content of soil by 1.05 times and 1.21 times,respectively.[Conclusion]Calcium magnesium slow-re-lease fertilizer prepared based on phosphate tailings can significantly improve the growth indicators of pak choi,promote its absorption and uti-lization of nutrients,and increase the content of available calcium and magnesium in the soil when applied on acidic soil,thereby improving the quality and yield of pak choi.关键词
磷尾矿/钙镁/缓释肥/小白菜Key words
Phosphate tailings/Calcium and magnesium/Slow-release fertilizer/Pak choi分类
农业科技引用本文复制引用
王景文,杨效家,张琦,许洪楠,朱燕君,李明江,唐亚福,肖雪..磷尾矿基钙镁缓释肥料对小白菜的应用效果研究[J].西南农业学报,2025,38(8):1616-1623,8.基金项目
湖南省教育厅优秀青年项目(23B0285) （23B0285）
云南云天化股份有限公司研发中心委托项目(YTH-4320-WB-FW-2022-020306-00) （YTH-4320-WB-FW-2022-020306-00）
福建省自然科学基金项目(2022J01606) （2022J01606）
