1962年G.W.Lock曾报导沙培试验中普通剑麻出现缺镁症状。A.Jacob(1960)在论述普通剑麻的营养问题时曾提到:剑麻需要大量的镁,要注意施用镁肥。 1981年我们在一组土培试验中发现H.11648的叶基烂枯,施镁肥处理则无此症状,而叶基烂枯的植株如施给镁肥则症状消失,恢复正常生长。随后的沙培试验,水培试验的缺镁处理,以及土培试验的钾处理中,H.11648也出现类似的症状,证实因缺镁所致,暂名为基枯病。大田调查中也发现 G.W.Lock 1962 years have reported common spermatozoon Shapei test magnesium deficiency symptoms occur. A. Jacob (1960), in his discussion of the nutritional problems of ordinary sisal, said: Sisal requires a lot of magnesium, and attention should be paid to the use of magnesium fertilizer. In 1981 we found in a group of soil culture experiments H.11648 leaf base rotten, magnesium treatment without such symptoms, and leafy rot plants such as magnesium fertilizer, the symptoms disappear and resume normal growth. Subsequent sand culture test, lack of magnesium hydroponic treatment, and soil culture test of potassium treatment, H.11648 also showed similar symptoms, confirmed due to magnesium deficiency, tentatively named as the root blight. Daejeon survey also found