长期以来,对小麦品种耐瘠薄特性的鉴定,一般采用产量比较的方法,即采用一块较瘠薄的土壤,种植不同的品种,在无任何外来养分供应的条件下,考察不同品种的生长状况,着重进行产量比较。也有人以特定时期不同品种根系长度、数量等形态指标及根系活力(如根系脱氢酶活性等)等生理 For a long time, the identification of barren characteristics of wheat cultivars generally uses the method of yield comparison, that is, using a barren soil, planting different varieties, without any external nutrient supply conditions, examine the growth of different varieties, focusing on Yield comparison. Also some people at different times of different varieties of root length, quantity and other morphological indicators and root activity (such as root dehydrogenase activity) and other physiological