Interactive effects of organic materials and electrical conductivity in the growing medium on the vase life of cut lisianthus flowers

Abstract

This study was conducted to determine the effects of certain organic materials added to the growing medium prior to harvest on the vase life of cut lisianthus (Eustoma grandiflorum) flowers. Nine different growing media were prepared by supplementing a peat+perlite mixture with varying proportions of thyme compost, leonardite, vermicompost, and humic acid. In addition, the electrical conductivity (EC) of the growing media was adjusted to two levels: 1.1 dS m⁻¹ and 2.2 dS m⁻¹. Vase life was evaluated using a visual scoring system to assess deterioration symptoms in leaves and flowers. As a result, the longest vase life (22.0 days) was obtained from the application of 20% thyme compost + EC 2.2. This treatment was followed by applications of 10% and 20% vermicompost + EC 2.2, and 10% thyme compost + EC 2.2. The shortest vase life (8.33 days) was recorded in the control group containing only peat + perlite. The findings revealed that the use of thyme compost and vermicompost in combination with high EC levels significantly extended the vase life of lisianthus flowers. It has been determined that applications of humic acid and leonardite also exhibit positive effects on vase life. This result indicates that the application of organic materials in combination with appropriate EC levels during the pre-harvest period enhances the postharvest longevity of cut flowers.

Keywords

• Humic acid
• vermicompost.
• leonardite
• thyme compost

Yetiştirme ortamındaki organik maddeler ve elektriksel iletkenliğin kesme lisianthus çiçeklerinin vazo ömrüne etkileşimli etkileri

Öz

Bu çalışma, hasat öncesi yetiştirme ortamına eklenen bazı organik materyallerin kesme lisianthus (Eustoma grandiflorum) çiçeklerinde vazo ömrü üzerine etkilerini belirlemek amacıyla yapılmıştır. Yetiştirme ortamı olarak torf + perlit karışımına farklı oranlarda kekik kompostu, leonardit, vermikompost ve humik asit ilave edilerek hazırlanan 9 farklı ortam kullanılmıştır. Ayrıca, yetiştirme ortamlarında elektriksel iletkenlik (EC) seviyeleri 1.1 dS m⁻¹ ve 2.2 dS m⁻¹ olacak şekilde iki farklı düzeyde ayarlanmıştır. Vazo ömrü, yaprak ve çiçeklerdeki bozulma semptomlarına dayalı olarak, görsel skorlama yöntemiyle belirlenmiştir. Sonuç olarak en yüksek vazo ömrü 22.0 gün ile %20 kekik kompostu + EC 2.2 uygulamasından elde edilmiştir. Bu uygulamayı, %10 ve %20 vermikompost + EC 2.2 ve %10 kekik kompostu + EC 2.2 uygulamaları takip etmiştir. En düşük vazo ömrü 8.33 gün ile yalnız torf + perlit içeren kontrol grubunda belirlenmiştir. Elde edilen sonuçlar, kekik kompostu ve vermikompost organik materyallerinin yüksek EC düzeyi ile birlikte kullanıldığında lisianthus çiçeklerinin vazo ömrünü önemli ölçüde uzattığını ortaya koymuştur. Humik asit ve leonardit uygulamalarının da vazo ömrü üzerinde belirli düzeyde olumlu etkiler gösterdiği belirlenmiştir. Bu sonuç, organik materyallerin hasat öncesi dönemde uygun EC seviyeleri ile uygulanmasının, kesme çiçeklerin hasat sonrası dayanıklılığını artırabileceğini ortaya koymaktadır.

Anahtar Kelimeler

• Humik asit
• leonardit
• kekik kompostu
• vermikompost.

Kaynakça

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