大葱培土是延长葱白长度,防止倒伏,提高大葱产量和质量的一项重要措施。在给大葱培土时应注意以下问题: 一、当大葱进入旺盛生长期后,叶片不断增加,叶鞘不断加长,这时就要开始分次培土,一般到收获前需培土 Green onion earth is to extend the blue length, to prevent lodging, improve onion production and quality of an important measure. In the earth to the green onion should pay attention to the following questions: First, when the green onions into the vigorous growth period, the leaves continue to increase, leaf sheaths continue to grow, then began to sub-sub-soil, generally to be cultivated before harvesting soil