温室条件下茄子灌溉制度初探

A Study on the Irrigation Schedule of the Sunlight Greenhouse Eggplant under Drip Irrigation

以茄子为试材,于2013年4-8月在天津市北辰区日光温室中进行试验,分析了气象因素对灌溉的影响,并制定了灌溉制度。结论如下:温室条件下大棚内温度一直较高,且随气温的增加而增加;温室属于较为封闭的环境,所以温室内湿度一直处于较高点,且灌水后有大幅度增加,湿度较高;滴灌茄子的滴灌灌溉制度为全生育期灌溉定额137.9mm,灌水定额为19.7mm/次,灌水次数为7次,茄子生长阶段的土壤水分下限适宜控制在70%的田间持水率(计划湿润层为40cm)。

The experiment was carried out in the Sunlight Greenhouse of Beichen district from April to August in 2013.The effects of weather on the water demands were analyzed,and the irrigation schedule of Eggplant was decided as follows：the temperature and humidity increased during the whole growth period in the Sunlight Greenhouse.The suitable drip irrigation schedule of the eggplants in the greenhouse is that the irrigation norm of whole growth period is 137.9mm,the irrigating water quota is 19.7mm and the irrigation frequency is 7times.The lower limit of soil water content is suitable to be controlled as 70% of the field capacity and the plan wetting layer height is 40 cm.