تأثیر جمعیت گیاهی و تغذیه نیتروژن بر عملکرد و میزان پروتئین دانهی ذرت شیرین در فارس

In order to study the effects of nitrogen and plant density on yield, yield components and protein in sweet corn var: Shaker an experiment was conducted at Zarghan Agricultural Research Station in 2013. The experiment was conducted as split plots based on completely randomized block design with 3 replications. In this study 4 levels of nitrogen fertilizer (50, 100, 150, 200 Kg N ha-1) as main factor and 4 plant density (55, 65, 75 and 85000 plant ha-1) as sub factor were compared. Results showed that nitrogen and plant density had significant effect on fresh ear yield and grain yield. Also interactions nitrogen and plant density had significant effect on fresh ear yield. The maximum of fresh ear yield (2300 gr m-2) was obtained from the 150 kg N ha-1 and 85000 plant ha-1. The maximum of grain yield (924gr m-2) was obtaind from the 200 kg N ha-1. The maximum of grain yield (845 gr m-2) was obtaind from the 85000 plant ha-1. The nitrogen and plant density had significant effect on grain protein content. The maximum of grain protein content (8/70) were obtained from 200 kg N ha-1 and maximum of grain protein content (7/77) were obtained from 85000 plant ha-1.