以往,日本曾在火山灰土壤地带观察过麦类的缺铜现象,但随着麦类栽培面积的减少,对此人们不太重视了.当前,由于贯彻了压缩水稻面积的政策,小麦面积相应增加,各地小麦缺铜症又随之发生,不仅在火山灰土壤,而且在棕色森林土、泥炭土的褐色低地上也时常 In the past, Japan observed copper deficiency in wheat in volcanic ash soils, but less attention has been paid to it as the cultivated area of ​​wheat decreased, and the area of ​​wheat has been correspondingly increased due to the policy of reducing the area of ​​rice , The lack of copper disease occurs in all parts of the country, not only in volcanic ash soil, but also in the brown forest soil, peat brown soil low often