Effects of different growth media to the nutrient content of primula (primula obconica) plant

Öz

Imported moss peat (IMP) and native peat (NAP) that is taken from Akgöl/Turkey were used in the growth medium of primula (Primula obconica) plants. Five different growth media were prepared using IMP and NAP, and some of their basic chemical and physical properties were determined. Then, the effects of media characteristics on nutrient contents of primula plant were evaluated. All growth media was found inadequate in concentration for water soluble nutrients NO₃-N, P, K, Fe and Zn but other nutrients were acceptable levels. Bulk density (BD) of growing media was found between 0.071-0.139 g cm^-3. When the ratio of NAP was increased in mixtures, BD also increased. Moreover, the growth media was prepared with IMP and NAP had enough aeration capacity (AC), low available water content (AWC), and very low water buffering capacity (WBC). Cation exchange capacity (CEC) values were determined as 83.32-105.70 me 100 g^-1. pH and EC of the media varied between 4.56-5.88 and 0.39-1.00 dS m^-1, respectively. On the other hand, when the NAP ratio was more than 75% in the mixtures, pH level was a little out of the desired limits. Organic C level was the highest in 100% IMP media. The quality parameters and the classical growth characteristics of primula plants were not significantly different across growing media. K, Mg, S and Na contents of the plants were generally at normal levels. However, significant differences were found in total Fe, Mn and Cu contents of plants. Fe amount was enough but Mn and Cu were lower than the acceptable levels in all media. All in all, primula plants were grown successfully in all media and reached saleable quality levels despite of the differences in some nutrient contents. It was suggested that NAP can be used as an alternative to IMP for horticultural purposes, such as a production of ornamentals in a greenhouse.

Anahtar Kelimeler

• Peat,plant growth medium,physical and chemical properties,primula,Plant nutrients

Farkli yetiştirme ortamlarinin primula (primula obconica) bitkisinin besin içeriğine etkileri

Öz

Primula bitkisinin yetiştirme ortamı olarak yosun kökenli ithal organik toprak (İOT) ve Akgöl/Türkiye den elde edilen yerli organik toprak (YOT) kullanılmıştır. İOT ve YOT’ın temel fiziksel ve kimyasal özellikleri belirlendikten sonra beş farklı yetiştirme ortamı hazırlanmıştır. Daha sonra primula bitkisinin besin maddesi içeriğine hazırlanan ortamların etkileri incelenmiştir. Yetiştirme ortamlarının suda çözünebilir NO₃-N, P, K, Fe ve Zn içerikleri yetersiz bulunurken, diğer besin elementlerinin yeterli seviyede olduğu belirlenmiştir. Ortamların hacim ağırlığı (HA) 0.071-0.139 g cm^-3 arasında bulunmuştur. Karışımlardaki YOT oranı arttıkça HA’ları da artmıştır. Ayrıca yetiştirme ortamı olarak hazırlanan İOT ve YOT yeterli havalanma kapasitesine (HK), düşük kolay alınabilir su içeriğine (KAS) ve çok düşük su tamponlama kapasitesine sahiptir. Katyon değişim kapasitesi (KDK) değerleri ise 83.32-105.70 me 100 g^-1 olarak belirlenmiştir. Ortamların pH ve EC değeri sırası ile 4.56-5.88 ve 0.39-1.00 dS m^-1 arasında değişmiştir. Karışımlarda YOT oranı % 75'den fazla olduğunda, pH düzeyi istenilen sınırların biraz dışındadır. Organik C ise, % 100 İOT karışımında en yüksek seviyededir. Farklı yetiştirme ortamları bakımından primula bitkisinin klasik büyüme özellikleri ve kalite parametreleri arasındaki farklılıklar önemli değildir. Bitkilerin toplam K, Mg, S ve Na içerikleri genel olarak normal seviyelerdedir. Bununla birlikte, bitkilerin toplam Fe, Mn ve Cu içeriklerinde önemli farklılıklar bulunmuştur. Tüm ortamlarda Fe miktarı yeterli iken, Mn ve Cu miktarları kabul edilebilir seviyelerden daha düşüktür. Sonuç olarak, primula bitkileri tüm ortamlarda başarılı bir şekilde yetiştirilmiş ve bazı besin içeriğindeki farklılıklara rağmen satılabilir kaliteye ulaşmıştır. YOT’ın İOT’a bir alternatif olarak ve serada süs bitkileri üretiminde kullanılması önerilmiştir.

Anahtar Kelimeler

• Organik toprak,Bitki yetiştirme ortamı,Fiziksel ve kimyasal özellikler,Primula,Bitki besinleri

Kaynakça

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