Chlorophyll fluorescence-based method for acquiring nitrogen concentration interval suitable for crop growth

• Main Authors: LU MIAO, YUAN KAIKAI, GAO PAN, WAN XIANGBEI, HU JIN, PU LIURU, ZHANG YAOJIA
• Format: Patent
• Language: Chinese; English
• Published: 12.11.2021
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

A chlorophyll fluorescence-based method for acquiring a nitrogen concentration interval suitable for crop growth comprises the following steps: culturing the same crop under different nitrogen concentration conditions, acquiring chlorophyll fluorescence parameters of the crop under different nitrogen concentration conditions, performing normalization treatment on the chlorophyll fluorescence parameters under each nitrogen concentration condition, solving the correlation between various chlorophyll fluorescence parameters and the nitrogen concentration, and screening out the chlorophyll fluorescence parameter with the highest correlation with the nitrogen concentration; according to the screened discrete points of the chlorophyll fluorescence parameters responding to the nitrogen concentration, fitting the discrete points to obtain a response curve of the chlorophyll fluorescence parameters to the nitrogen concentration; and calculating the discrete curvature of the response curve, and taking a curvature chara