পদ্ধতির তুলনা করুন

	পাতার ক্ষেত্রফল সূচক	ক্লোরোফিল ফ্লুরোসেন্স
ক্ষেত্র	কৃষিতত্ত্ব	কৃষিতত্ত্ব
পরিবার	Process / pipeline	Process / pipeline
উদ্ভবের বছর	1947	1931-2004
প্রবর্তক	Donald J. Watson	Hans Kautsky, Ulrich Schreiber, Reto J. Strasser
ধরন	Plant morphometric measurement	Non-invasive photosynthetic measurement
মৌলিক উৎস	Watson, D. J. (1947). Comparative physiological studies on the growth of field crops: I. Variation in net assimilation rate and leaf area between species and varieties, and within and between years. Annals of Botany, 11(43), 375-407.	Kautsky, H., & Hirsch, A. (1931). Neue Versuche zur Klärung der Assimilationstätigkeit. Naturwissenschaften, 19(48), 964-964.
অপর নাম	LAI, Leaf area, Canopy structure	Fluorescence, Fv/Fm, OJIP curve, PAM fluorometry
সম্পর্কিত	3	3
সারসংক্ষেপ	Leaf Area Index (LAI) is a dimensionless quantity that measures the total one-sided area of leaves per unit ground area covered by a canopy. It quantifies canopy density and structure: LAI = 0 for bare soil, LAI = 1 for a thin crop, LAI = 3-6 for dense cereal or grass canopies, and LAI > 8 for dense forest. LAI is a key variable in crop growth models, evapotranspiration estimation, and remote sensing because it directly controls light interception, photosynthesis, and water loss from vegetation.	Chlorophyll fluorescence is a non-invasive optical measurement of how efficiently the photosynthetic machinery converts absorbed light into chemical energy (photosynthesis) or heat and light (fluorescence). When photosynthesis is inhibited by stress (drought, cold, salt, pests), chlorophyll fluorescence increases because excitation energy cannot be used for photosynthesis and must be released as light or heat. Fluorescence parameters (Fv/Fm, OJIP curves) act as sensitive, rapid indicators of photosynthetic stress, enabling early detection of plant dysfunction before visible symptoms appear.