Gana'daki yem çalılarının baltalık tepkisi üzerine farklı kesme yüksekliklerinin etkileri

Öz

Bu çalışmada, seçilen savana yem çalısı türlerinin geri kazanım oranı, büyümesi ve biyokütle üretimi üzerine kesme yoğunluğunun etkisini belirlemek amaçlanmıştır. Çalışma, Kalkınma Araştırmaları Üniversitesi’nin (UDS: University for Development Studies) Gana’nın kuzeyinde Tolon Bölgesi’nde yer alan Nyankpala Kampüsü’nde gerçekleştirilmiştir. Cajanus cajan, Stylosanthes mucronata, Tephrosia purpureum ve Securinega virosa çalıları standart kesimden bir ay sonra, zemin seviyesinden 15 cm, 30 cm ve 60 cm yükseklikten kesilmiş ve filizlenen gün sayısı, sürgün sayısı, bitki boyu ve kök boğazı çapı kaydedilmiştir. Deneme, tesadüf blokları deneme desenine göre dört tekerrürlü olarak yapılmıştır. Filizlenme için 60 cm’den kesilen çalılarda daha az ortalama gün sayısı (4.25) gerekirken, 15 cm’den kesilenler ise daha uzun süre (4.92) gerekmiştir. Bitki boyu, sürgün sayısı ve kesim sonrası kök boğazı çapı 60 cm'den kesilen çalılar için en yüksek değerleri vermiştir. Securinega virosa en az ortalama gün sayısında (4.00) filizlenirken, S. mucronata ise kesimden sonra en yüksek ortalama gün sayısında (5.44) filizlenmiştir. Toplam kuru madde verimi, 60 cm’den kesilen çalılar için en yüksek (123.90 g/bitki), 15 cm’den kesilenler için en düşük (91.20 g/bitki) bulunmuştur. Cajanus cajan önemli ölçüde daha yüksek toplam kuru madde (116.30 g/bitki) değerine sahip iken, S. virosa en düşük (93.00 g/bitki) değere sahiptir. Sonuçlar, kesim yüksekliğinin kesmeden sonra çalıların filizlenme oranını önemli ölçüde etkilediğini ve kesme etkisine verilen yanıtın türe bağlı olduğunu göstermektedir.

Anahtar Kelimeler

• Baltalık
• Kesim yüksekliği
• Kuru madde
• Çalı
• Filiz

Effects of different cutting heights on coppice response of forage shrubs in Ghana

Öz

This study aimed to determine the effect of cutting intensity on the recovery rate, growth, and biomass production of selected savanna forage shrub species. The study was conducted at the University for Development Studies (UDS), Nyankpala Campus in the Tolon District of the Northern Region of Ghana. Cajanus cajan, Stylosanthes mucronata, Tephrosia purpureum and Securinega virosa were cut at 15 cm, 30 cm, and 60 cm above ground level a month after a standardizing cut and number of days to sprout, the number of shoots, plant height, and root collar diameter was recorded. The experiment was a randomized complete block design with four replications. Shrubs cut at 60 cm used less mean number of days (4.25) for sprouting and those cut at 15 cm took a longer period (4.92) to sprout. Plant height, number of shoots, and root collar diameter after cutting were highest for shrubs cut at 60 cm. Securinega virosa used less mean number of days (4.00) to sprout while S. mucronata used the highest mean number of days (5.44) after cutting. Total dry matter yield was significantly highest (123.90 g/plant) for shrubs cut at 60 cm but lowest for those cut at 15 cm (91.20 g/plant). Cajanus cajan recorded a significantly higher total dry matter (116.30 g/plant) while S. virosa had the lowest (93.00 g/plant). Our results suggest that cutting height significantly influences the rate of sprouting of shrubs after cutting, and the response to the cutting effect is species-dependent.

Anahtar Kelimeler

• Coppice
• Cutting height
• Dry matter
• Shrub
• Sprout

Kaynakça

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