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1982年3月至1983年4月在壤质的沙土上,研究了在不同氮的水平下土壤施镁和叶面施镁对小麦生长及产量的影响。结果表明;只有在施氮量较大的情况下,冬小麦对施镁具有明显的反应。在施氮量较大时(120公斤/公顷),给小麦土壤施镁和叶面喷镁(10公斤/公顷),每公斤镁分别可以生产56和68公斤小麦。而施氮量低时(60公斤/公顷),1公斤镁可分别生产14公斤和15公斤。在氮量较大时,镁可以增加叶绿素的含量、叶面积指数、提高捕获的光合作用有效幅射量,提高有效分蘗数以及每穗的粒数。与施镁量较低时(10公斤/公顷)相比较,施较多镁(20公斤/公顷)并不能产生更好的效果。在播后90天,小麦叶冠捕获的光合作用有效幅射量最大,叶面积指数及叶绿素含量也达到最大。
From March 1982 to April 1983 on the loamy soil, the effects of soil magnesium and foliar application of magnesium on the growth and yield of wheat under different nitrogen levels were studied. The results showed that winter wheat had obvious reaction to magnesium application only under the condition of large amount of nitrogen fertilizer. At large N rates (120 kg / ha), magnesium and foliar magnesium (10 kg / ha) were applied to wheat soils and 56 and 68 kg of wheat were produced per kilogram of magnesium, respectively. However, when nitrogen is low (60 kg / ha), 1 kg of magnesium can produce 14 kg and 15 kg respectively. When the amount of nitrogen is larger, magnesium can increase the content of chlorophyll, leaf area index, increase the effective radiation of photosynthesis captured, increase the number of effective tillers and the number of grains per panicle. Application of more magnesium (20 kg / ha) did not produce better results than when the amount of magnesium was low (10 kg / ha). 90 days after sowing, photosynthesis of wheat leaves captured the most efficient radiation, leaf area index and chlorophyll content also reached the maximum.