研究不同光照强度对几个品质标准的影响。通过在生长箱、温室及露地的试验表明,通常光照强度低对品质是有害的。如果光照强度从35000勒克司(1x)降低到6000勒克司,会使莴苣的干物质含量从7.23％下降到4.39％;维生素C的含量从16.54毫克/100克减至9.86毫克/100克。光照强度低使 Study of different light intensity on several quality standards. Tests in growth chambers, greenhouses and open fields have shown that generally low light intensity is detrimental to quality. If the light intensity was reduced from 35,000 lux (1x) to 6000 lux, the dry matter content of lettuce decreased from 7.23% to 4.39%; the vitamin C content was reduced from 16.54 mg / 100 g to 9.86 mg / 100 g. Low light intensity