Paper Information

Journal:   IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES   2004 , Volume 18 , Number 1; Page(s) 0 To 0.
 
Paper: 

THE EFFECT OF VARIOUS RATES OF POTASSIUM AND MAGNESIUM ON THE YIELD AND QUALITY OF SUNFLOWER IN KHOY AREA

 
 
Author(s):  SEPEHR E., MALAKOUTI M.J.
 
* 
 
Abstract: 

A completely randomized factorial block experiment with three replications was carried out during 2001 at Khoy Agr. Research Station to evaluate the main and interactive effects of potassium and magnesium on the yield and quality of Golshid variety of sunflower. Due considerations were given to the antagonistic effects between these two nutrients in the context of determining the optimum levels of fertilizer application for the best yield. The treatments included four levels of potassium (K0=0, K1=45, K2=90 and K3=135 kg K2O as potassium sulfate per hectare) and four levels of magnesium sulfate ((Mg0=0, Mg1=50, Mg2=100 and Mg3=150 kg MgSO4/ha). The results showed that seed yield increased with increasing levels of potassium up to the rate of K3=1.5 times the SWRI’s recommended rate combined with magnesium sulfate up to 100 kg/ha yielded the best with no significant increases at higher rates. The best rate for magnesium sulfate turned out to be 50kg/ha. Application of potassium and magnesium increased the thousand kernel weight but no effect was seen on the plant height or the diameter of the plant stem. The diameter of the sunflower disc improved with the application of potassium and magnesium but the effect was not significant. There were no significant interactive effects between potassium and magnesium levels. However, the best seed yield was obtained with K2Mg1 and the best disc diameter and the thousand kernel weight were obtained with K3Mg2. Finally, the best ratio for the rates of potassium to magnesium was determined to be about 3 to 1.

 
Keyword(s): SUNFLOWER, POTASSIUM, MAGNESIUM, YIELD
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 58
 
Latest on Blog
Enter SID Blog