Effects of Different LED Light Qualities and L-Glutamic Acid Application on Growth and Quality of Red Japanese Mustard Spinach (Brassica rapa var. perviridis) Under Plant Factory Conditions
Yu Jin Kang·Ho-Min Kang·Yong Beom Kwon·Ah Young Shin·Jeong Eun Sim·In-Lee Choi·Hyuk Sung Yoon·Yongduk Kim·Jidong Kim·Si-Hong Kim·Kiduk Park·Joo Hwan Lee
This study investigated the effects of four LED light qualities, red+blue+far-red (WRS-LED), blue+red (BR-LED), blue (B-LED), and red (R-LED), and exogenous L-glutamic acid at 10 ppm on the growth and quality of red mustard spinach (Brassica rapa var. perviridis) cultivated in a plant factory using a recirculating deep-flow hydroponic system. Plants were exposed to four LED light quality treatments at 180 ± 10 μmol·m−2·s−1 PPFD for 28 days after transplanting. L-glutamic acid at 10 ppm was appli