近几年来,我国南方大麦由于黄化早衰单产降低,栽培面积也被迫减少。这种情况以华中红壤地区最为严重。造成大麦黄化早衰的原因会有许多方面,以下的研究结果表明,在土壤养分正常供应的情况下,土壤过酸是我国南方大麦黄化早衰的主要原因。 In recent years, China’s southern barley due to premature yellowing reduced yields, cultivation area was forced to reduce. This situation is the most serious red soil region in central China. There are many reasons for the premature aging of barley. The results of the following studies show that the soil over-acid is the main reason for the premature yellowing of barley in southern China under the condition of normal supply of soil nutrients.