C4盐生植物的产量、光利用效率和营养品质--马齿苋在不同光照强度、光周期和日照积分下的室内生长Yield, Light Use Efficiency and Nutritional Quality of C4 Halophyte Portulaca oleracea L. Grown Indoors under Different Light Intensities, Photoperiods and Daily Light Integrals何洁新加坡南洋理工大学教授HE JieProfessor of Nanyang Technological University, Singapore