روابط بين درصد جذب تابش و برخي از شاخص هاي فيزيولوژيك مرتبط با عملكرد هيبريدهاي مختلف ذرت دانه اي

Experts of agriculture believes that decreasing of radiation influence into canopy may cause to lower the yield of agricultural plants. In real, if plant wants to use sun radiation more efficiently, it should absorb the maximum of radiation. Therefore, if each factor, that increases the absorption of radiation, it will cause to increasing of grain yield. Therefore, the relation between percentage of light interception into canopy with physiological indices as efficient on the growth including of NAR, CGR and LAI in different on the yield of three kinds of different hybrids of (Zea mays L). In the framework of statistical plan of randomized complete block design and in three repetitions. This experiment includes of 9 treatments that Ihe attendances are combination of hybrid and different densities. The obtained results of above experiment showed that generally in all treatments, when CGR is in its maximum rate, LAI rate is in its maximum level. but the percentage of light interception into canopy is in its lowest rate. The highest rate of CGR and NAR in related to hybrid SC711 in density of 75000 bushes per hectare and its lowest rate are in related to the same hybrid in density of 95000 bushes per hectare. Also, variance analysis of grain yield for three groups of maize showed that hybrid SC711 and DC370 in densities of 95000 and 105000 bushes per hectare have the lowest and highest yield.