DETERMINATION OF POTASSIUM REQUIREMENT AND EFFECTS OF POTASSIUM FERTILIZATION ON GROWTH PARAMETERS OF HYPOESTES Hypoestes sanguinolenta

Abstract

Hypoestes Hypoestes sanguinolenta were planted in PVC pots filled with perlite and irrigated with nutrient solutions of variable potassium contents. The height, fresh and dry weights and mineral composition of top and root and nutrient uptake were evaluated. The results obtained showed that increase of the K level in the nutrient solution up to 100 ppm increased the height of top and root, and growth. Above this level, they were affected adversely. Mineral composition of plants showed similar tendency to that of growth. Top and root height showed approximately three-fold an one and a half fold increase over to the control at 100 ppm K level reaching from 15.9-to 43.4 cm and 16.1-to 24.3 cm respectively for top and root. Fresh and dry weights increased from 3.17 to 18.96; 0.49 to 2.49 g/pot for top and 1.92 to 6.19; 0.16 to 0.50 g/pot for root respectively at the same K rates. While uptake and contents of P with K uptuke by both top and root increased up to 100 ppm K level, each increment of K in nutrient solution resulted in increasing in K concentration.

Keywords

• Ornamental plants
• Hypoestes
• mineral composition
• potassium

POTASYUM GüBRELEMES İNİN HİPOESTES Hypoestes sanguinolenta B İTKİSİNİN GELİŞİMİNE ETKISI VE POTASYUM GEREKS İNİMİNİN BELİRLENMESİ

Abstract

Serada, değişik oranlarda potasyum içeren besin çözeltisiyle perlit doldurulmu ş plastik saksılarda Hipoestes Hypoestes sanguinolenta bitkisi yeti ştirilerek, bitkinin tepe ve kök boyu, ya ş ve kuru ağırlığı ile N, P, K kapsamı ve bunlann al ı nım miktarları belirlenmiştir. Elde edilen sonuçlara göre; 100 ppm K düzeyine kadar besin çözeltisindeki K konsantrasyon artt ıkça bitkinin tepe ve kök geli ş imi ile boyları da artmış ve 100 ppm K düzeyinden sonra olumsuz etkilenmi ştir. Bitkinin mineral bileşimi de buna benzer değişim göstermiştir. Tepe ve kök boylar ı sı rası yla kontrolde 15.9 cm den 100 ppm K düzeyinde 43.4 cm ve 16.1 cm den 24.3 cm ye yükselerek s ırasıyla yaklaşık 3 ve 1.5 kat artış göstermi şlerdir. Aynı K düzeylerinde tepe ve kök yaş ve kuru ağı rlıkları ise sırası yla 3.17-18.96; 0.49-2.49; 1.92-6.19; 0.16-0.50 g/saks ı olarak gerçekleşmiştir. Tepe ve kökün P kapsam ı ve P al ımı ile K alımı l00 ppm K düzeyine kadar art ıp sonra azalırken, bitkinin K kapsamı tüm K düzeylerinde artmıştır.

Keywords

• Süs bitkileri
• Hypoestes
• mineral kapsam ı
• potasyum

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