Paper Information

Journal:   IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES   2003 , Volume 17 , Number 2; Page(s) 115 To 122.
 
Paper: 

ZINC CALIBRATION IN THE FIELD AND ITS EFFECTS ON SOYBEAN YIELD

 
 
Author(s):  ASADI KANGAR SHAHI A., MALAKOUTI M.J.
 
* 
 
Abstract: 
This experiment was conducted to study the effect of Zn-fertilizer on the yield and quality of soybean seed, and to determine the critical level of Zn in the soils of eastern part of Mazandaran Province. The soils had a wide range of CaC03 (5-39%) and DTPA extractable Zn (0.60-3.5 mg/kg soil). In each farm, the experiment was a randomized complete block design with two Zn treatments (0 and 40 kg zinc sulfate per hectare) and three replications. Twenty kg /ha urea as starter fertilizer was applied to all plots. Also, to the soils that had less than 15 mg P/kg (Olsen method) and less than 300 mg K/kg (Ammonium acetate IN pH7), 50 kg triple super phosphate/ha and 100 kg potassium sulfate/ha were added, respectively. The size of each experimental plot was 49 m2 and the planted variety of soybean was Perching. The aerial part of plants was harvested at the end of the growth period. Absolute yield and relative yields, Zn concentration and uptake, 1000 seed weight, number of seeds per plant and seed protein percent were used as plant responses. Parameters. The critical levels of Zn were calculated by Cate-Nelson and Mitcherlich-Bray methods. Application of 40 kg ZnS04 increased seed yield, Zn concentration in seed and Zn uptake by 18.7, 14.7 and 37 percent, respectively, and also 1000 seed weight, number of seeds per plant and seed protein percent were increased by 8, 5.7 and 3.5 percent, respectively. Based on the results, the critical levels of Zn in these soils were 1.25 and 1.30 mg/kg by Mitcherlich-Bray and Cate-Nelson methods, respectively. The results of the two methods were almost identical.
 
Keyword(s): CALIBRATION, ZINC, SOYBEAN, UPTAKE
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 41
 
Latest on Blog
Enter SID Blog