Canopy analysis on the relationships between leaf area index and productivity in lowland rice, Oryza sativa , L.

Different densities of populations were created under field conditions at two levels of N and canopy analysis was made with variety Sona on different growth parameters governing productivity. The relationships between leaf area index (LAI) and dry matter, grain yield and grain number were quadratic. LAI vs panicle number and grain number vs grain yield relationships were linear. The panicle number and grains per panicle are found to be compensatory for one another. The intercepting points of the two appear to be around 400 panicles per square metre with a grain range of 90–100 per panicle. re]19750228