Effect of LED Red and Blue Continuous Lighting before Harvest on Growth and Nutrient Absorption of Hydroponic Lettuce Cultivated under Different Nitrogen Forms and Light Qualities
LIU Zong-xin1,2, SHEN Xue-jing1,2*, LI Dong-ling3, ZHAO Lei1,2
Study on the Element Distribution of Gradient Stainless Steel Samples Prepared by Additive Manufacturing and Its Application Based on Laser Induced Breakdown Spectroscopy