Production of vegetable transplants in artificial controlled environment.

需要一些适当的储存方法，作为防止因天气条件导致种植作业意外延迟的对策。对蔬菜穴盘苗的贮藏方法进行了研究。生菜穴盘苗宜采用低温（2-5 ℃）贮藏。该方法采用薄PE袋包裹塞盘，不避雷。2 ℃下贮藏的幼苗，在贮藏后株高逐渐伸长，叶色逐渐变淡，贮藏30 d内无死苗现象。实际上，生菜幼苗可贮藏3 ~ 4周以上。贮藏袋内充入CO_2（气调贮藏技术）可延长实际贮藏期conc.in研究了不同黑暗时间对工厂化蔬菜穴盘育苗生长和生产效率的影响。缩短黑暗时间，生菜幼苗的生长速率明显提高。虽然植物工厂化的运行成本没有降低，但提高生长速度压缩了工厂化的赎回成本，从而压缩了穴盘育苗的总生产成本。由于出现了某种生理障碍，该技术在番茄和黄瓜上没有实际应用。对这一现象的进一步研究工作有待进一步开展。

Some appropriate storage methods are required as a countermeasure against unexpected delays of planting operations which can be caused by weather conditions. In this research, the methods for storage of vegetable plug-seedling were investigated. For lettuce plug seedlings, the low-temperature (2-5ﾟC) storage method was recommended. In this method we used thin PE bag to wrapped plug tray and no lightning. The stored seedlings at 2ﾟC elongated their plant heights and the leaf color faded gradually after they were put in storages, while no seedling died during the storage period even in 30 days storage. Actually, the lettuce seedling could stored over 3 to 4 weeks practically. The practical storage period could be extended by the enriching CO_2 conc.in the storage bag (CA storage technique). Further studies with other vegetable plug seedling is necessary for growers.Effects of different dark periods on the growth and production efficiency of vegetable seedlings in plant factory were also investigated. When dark period was shortened, the growth rate of lettuce seedling were greatly increased. Although the running cost for plant factory was not decrease, increasing growth rate compressed the cost of redemption for the factory and of course the total production cost for plug seedling.For the present, when the dark period was shorter than 6 hours the growth of tomato and cucumber seedling were abnormal. For some kind of physiological disorder appeared, the use of this technique with tomato and cucumber was not in practice. Further research work concern with this phenomenon was expected.