Evaluation of Rose Nutritional Condition in Northern Khuzestan(Dezful)
2004
Kiani, Shahram | Pak neghad, Ali Reza | Mihan khah, Moslem | Kafi, Mohsen
North Khuzestan with 245 hectares of rose flower is one of the most important regions in Iran that produces 36 percent of cut flower roses in winter. In order to evaluate nutritional problems of rose farms, samples of irrigation water, soil, leaf and flower were prepared from 34 rose flower farms. Chemical characteristics of irrigation water, soil physicochemical characteristics, leaf mineral concentrations and flower quality indices were determined. Afterward rose farms based on flower quality indices were divided to rose farms with high quality flowers and low quality flowers. Finally leaf mineral concentrations and flower quality indices in two groups were compared based on t Test. The results of this experiment showed that the classification of irrigation water was C2S1, which was very good. Average electrical conductivity of studied soils was 1.16 dS/m, therefor this soils had not salinity problem. High amount of CaCO3 in soils was led to increase the soil pH, which the average amount of its was 7.7. Irregular application of phosphorous fertilizers by farmers resulted to increase the content of available phosphorus in soil up to 28.2 mg/kg. Reduction of available potassium in studied soils to 120mg/kg resulted to decreases the flower quality indices. The average available soil micronutrients including Fe, Mn, Zn and Cu were 7.9, 4.5, 1.5 and 2.1 mg/kg respectively, that were all optimum except to Mn for rose production. The results revealed that there was a significant increase at 1% level in leaf potassium concentration, flower fresh weight, length and diameter of flower in rose farms with high quality flowers compared to rose farms with low quality flowers. Other leaf nutrients were not significant difference in two groups.
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