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通过大田和培养试验,研究了福建省几种红壤施用镁肥的增产效果。认为供试的酸性红壤交换性镁含量在4.7mg/100g 土以下时施用镁肥,对促进大豆、油菜根系和地上部生长,加强氮、磷、镁素的吸收,均有良好的作用;对大豆、油菜和甘薯有较好的增产效果。镁肥配合当地农家肥施用,对大豆仍有一定增产作用。在当前闽南生产水平下,大豆和甘薯每公顷施用镁15～19公斤较为适宜。由于遗传基因的不同,作物对营养液中镁素浓度的要求以及对低浓度镁的敏感性也不同。其要求高低和敏感性大小顺序为:油菜>大麦、豌豆>小麦。
Through field experiments and cultivation experiments, the effects of applying magnesium fertilizer on several red soils in Fujian Province were studied. It is considered that applying magnesium fertilizer under the condition that the exchangeable magnesium content of acid red soil is below 4.7mg / 100g soil, which is good for promoting the growth of roots and aerial parts of soybean, rapeseed and enhancing the absorption of nitrogen, phosphorus and magnesium; Soybean, rape and sweet potato have a better yield. Magnesium fertilizer used in conjunction with local manure, soybeans still have a certain yield. In the current level of production in southern Fujian, soybean and sweet potato hectare per hectare of 15 to 19 kg is more appropriate. Due to the different genetic factors, the requirement of crops for the concentration of magnesium in nutrient solution and the sensitivity to low concentration of magnesium are also different. The order of magnitude and sensitivity are: rape> barley, pea> wheat.