The effects of Znso4 on growth analysis, yield and the amount of protein and zinc in different wheat cultivars

In order to study of the effects of various Znso4 rates on growth analysis, yield and the amount of protein and zinc in wheat cultivars, a factorial experiment based on randomized complete block design with three replications was conducted in Ardabil Agriculture Research Station in 2002 -2003 years. Factors were: cultivars of wheat in four levels (MV-17, Caspard, Alamut and C-73-20) and Znso4 fertilizer in three levels (0, 40 and 80 kg/hectare of Znso4). The results combined analysis of variance showed that with increasing ZnSo4, increased grain yield and the amount of Zn and protein percentage, however there weren’t significant difference between application 40 and 80 kg/he ZnSo4 in grain yield and amount of Zn in grain. The highest and the least grain yield was obtained in Caspard and Alamut. Interaction year* Znso4 was significant on Zn and protein rates at the 1% levels of probability. Means comparison showed that with increasing application of Znso4, the amount of zinc and protein increased but it was in 2002 more than 2003. The highest and the least protein percentage were obtained in Caspard and C-73-20 cultivars respectively, however there werent significant difference between Caspard and Alamut cultivars. Maximum rate of protein and Zn were obtained with increasing application Znso4. The least percentage of zinc was in Caspard cultivar and the least percentage of protein was obtained in MV-17 cultivar. Maximum grain yield was in Caspard and minimum it was in Alamut. Interaction between cultivars*the rate of Znso4 application was significant on the percentage of grain protein and the maximum was in Caspard cultivar with application 80 kg/he Znso4 and the least was in C-73-20 cultivar without application. The investigation of growth analysis showed that by increasing Znso4, crop growth rate and total dry matter were increased. Fertilizer levels at 40 and 80 kg/he had by similar effect on total dry matter and crop growth rate, but more than control (without application fertilizer). So that, application of 40 kg/ha Znso4 in order to increasing protein and zinc of seed was suggested.