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淮河以北平原是我国砂姜黑土最主要的分布区,这个地区过去有四大作物,小麦、山芋、大豆和高粱,近年来因水利条件改善,逐步推广了玉米种植,并且有人认为这个地区应规划为我国的玉米带。但在该地的玉米大田生产中,经常能看到一些玉米幼苗个体变红的现象,凡瘠薄地、砂姜裸露地、碱化土上红苗出现必多,但在靠近村庄的肥沃土壤上,从未发现红苗,可见红苗现象和土壤条件有关。
The northern plain of the Huaihe River is the most important distribution area for sago black soil in China. In the past, there were four major crops such as wheat, potato, soybean and sorghum. In recent years, due to the improvement of water conservancy conditions, the cultivation of corn has gradually been promoted. Some people think that this area should be Planning for the corn belt in China. However, in this field of corn field production, we can often see some reddening of corn seedling individual phenomenon, where barren land, ginger ginger exposed, alkalized soil on the emergence of red seedlings more, but in the fertile soil near the village , Never found red seedlings, we can see the phenomenon of red seedlings and soil conditions.