棉花回龙火坑育苗的特点是容易掌握,出苗快,生长均衡,节约种子,利于良种繁殖,提高繁殖系数,是抗灾夺全苗的有效措施。在应用过程中要注意以下几个问题: 1.回龙火坑的温度是通过火道,经过烟层直接到达床面的。因为床面较薄,温度容易升高,因此,加温过程中要经常检查床土温度,使保持在26-30℃之间, Huilong Huilong fire pit nursery is characterized by easy to grasp, fast emergence, balanced growth, saving seeds, good breeding, improve breeding coefficient, is an effective measure to seize the whole disaster. In the application process should pay attention to the following questions: 1. Huilong fire pit temperature is through the fire, through the smoke layer directly to the bed. Because the bed is thin, easy to raise the temperature, therefore, the heating process should always check bed temperature, so keep at between 26-30 ℃,