小拱棚春芹菜定植在3月上中旬，最迟不超过3月下旬，由于这茬芹菜从播种到采收只有100天～120天。时间短、温度低、日照长，易抽。因此，想要获得高产，除合理密植外，还应搞好定植后的管理。1．调节温度定植初期密闭保温。中午棚内温度较高，但因棚内湿度大，水分充足，不致产 Small arch spring celery colonization in mid-March, at the latest no later than March, because this crop of celery from sowing to harvest only 100 days to 120 days. Short time, low temperature, long sunshine, easy pumping. Therefore, you want to obtain high yield, in addition to rational close planting, but also should do a good job after planting management. 1. Adjust the temperature of the initial confined temperature insulation planting. Noon shed temperature is high, but the shed humidity, adequate water, do not produce