轉作稻田大豆缺鎂防治試驗

Soil Amendment for Magnesium Deficiency of Soybean in Converted Paddy Field

陳忠明(Jong-Ming Chern)

《花蓮區農業改良場研究彙報》 6期 (1990/03) Pp. 9-10

摘要

花蓮地區轉作稻田種植大豆時部份地區常發生缺鎂現象；導致光合作用受抑制，進而影響生育及產量。為探討其防治方法，本試驗利用大豆花蓮1號品種施用鎂資材進行其對大豆缺鎂之效果。試驗結果，未施用鎂資材之處理，大豆在生育初期即開始呈現缺鎂症狀，葉片上產生黃色條紋，爾後逐漸轉劇，至成熟期達到高峰，嚴重者葉片萎凋，其大豆子實收量亦較低。施用硫酸鎂、白雲石粉、蛇紋石粉皆有矯正缺鎂症狀及增產效果，其中以土施白雲石粉較佳。

關鍵字

大豆 ； 缺鎂

並列摘要

Magnesium deficiency in high yielding soybean Hualien No. 1 is a very common phenomenon of soil micro-element deficiency in converted paddy field in Hualien area. Magnesium deficiency not only inhibits photosynthesis but also diminishs growth and yield potential of soybean. The purpose of this experiment is to determine the best soil amendment method for correcting the soybean magnesium deficiency and to increase soybean yields in converted paddy field. Five treatments with MgSO_4 250 kg/ha. MgSO_4 500 kg/ha, serpentine powder, dolomite powder, foliar spray of MgSO_4 and check (no soil amendment) were included in the experiments. The results showed that the application of MgSO_4. serpentine powder and dolomite powder corrected the magnesium de ficiency and improved the growth of soybean. Application 500 kg/ha of dolomite powder as base fertilizer was the best among treaments and which would be recommended to local farmers.

並列關鍵字

Soybean ； Magnesium deficiency