Fiber yield-Boron relationship in industrial hemp

Öz

The aim of the study was to evaluate the response of industrial hemp (Cannabis sativa L, cv: Vezir) grown in boron (B) deficient areas to boron application and to determine the effects of B application on the growth and fiber yield of industrial hemp. The field experiment conducted with industrial hemp plants was carried out on the date of 23.04.2023 within the borders of Kızılcaörhen village, Taşköprü-Kastamonu region, in the producer's field (41.51126 N, 34.02726 E, altitude 708 m) according to the randomized block trial design with three replications. In the experiment, Etidot-67 (Disodium Octaborate Tetrahydrate, Na3B8O13.4H2O) fertilizer containing 20.8% B was applied to the soil as 0 (control), 0.2 and 0.4 kg B da-1 B and the B fertilizers in solution form were sprayed homogeneously on the soil surface and also mixed well with the soil using a hoe. According to the soil analysis results, 8 kg N da-1, 8 kg P2O5 da-1 and 8 kg K2O da-1 15-15-15 fertilizer was applied together with planting, and 4 kg N da-1 urea fertilizer was applied as top dressing on the date of 20.05.2023 when the plants reached approximately 30 cm in height. As a result of the measurements and plant analyses made on the plants obtained after harvest, it was determined that the fresh and dry weight, plant height and technical stem length of the industrial hemp plant increased depending on the B applied and that B fertilization was effective on these parameters. When 0.4 mg B kg-1 was applied to the control application, there was an increase of 28.8% in fresh weight, 27.2% in dry weight, 73.5% in fiber yield and 41.2% in fiber ratio. When 0.4 mg B kg-1 was applied compared to the control, plant height increased by 20.7% and technical stem length increased by 24.4%. When B was not applied, the boron concentration in the leaves and fibers of the industrial hemp plant was determined to be below the critical concentration (< 20 mg B kg-1). In contrast, when 0.4 kg B da-1 was applied, the B concentration in the leaves and fibers increased. The boron deficiency determined in the leaves of the industrial hemp plant increased to normal levels with B application.

Anahtar Kelimeler

• Industrial hemp (Cannabis sativa L.) stem yield
• fiber yield
• boron concentration

Endüstriyel kenevirde lif verimi-Bor ilişkisi

Öz

Çalışmada bor noksan alanlarda yetiştirilen endüstriyel kenevirin (Cannabis sativa L, cv: Vezir) bor uygulamasına tepkisini ortaya koymak ve bor uygulamasının endüstriyel kenevirin gelişimi ve lif verimi üzerine etkilerini belirlemek amaçlanmıştır. Endüstriyel kenevir bitkisi ile yürütülen tarla denemesi Kastamonu ili, Taşköprü ilçesi Kızılcaörhen Köyü sınırları içerisinde 23.04.2023 tarihinde tesadüf blokları deneme desenine göre üç tekerrürlü olacak şekilde üretici tarlasında (41.51126 K, 34.02726 D, yükseklik 708m) kurularak yürütülmüştür. Denemede topraklara bor 0, 0.2 mg B kg-1 ve 0.4 mg B kg-1 olacak şekilde % 20.8 bor içeren Etidot-67 (Disodyum oktaborat tetrahidrat, Na3B8O13.4H2O) gübresinden uygulanmış ve çözelti formundaki borlu gübreler homojen bir şekilde toprak yüzeyine püskürtülmüş ve ayrıca çapa kullanılarak toprakla iyice karıştırılmıştır. Toprak analiz sonuçları göre ekimle birlikte 8 kg N da-1, 8 kg P2O5 da-1 ve 8 kg K2O da-1 15-15-15 gübresinden, üst gübreleme olarak ise bitkiler yaklaşık 30 cm boya ulaştığında 20.05.2023 tarihinde 4 kg N da-1 üre gübresinden uygulanmıştır. Hasat sonrası elde edilen bitkilerde yapılan ölçüm ve analizler sonucunda, Endüstriyel kenevir bitkisinde yaş ve kuru ağırlık ile bitki boyu ve teknik sap uzunluğu uygulanan bora bağlı olarak artmış ve borlu gübrelemenin bu parametreler üzerine etkili olduğu belirlenmiştir. Kontrol uygulamasına 0.4 mg B kg-1 uygulandığında yaş ağırlık miktarında % 28.8, kuru ağırlık miktarında % 27.2, lif veriminde % 73.5 ve lif randımanında ise % 41.2 oranında artış olmuştur. Kontrole göre 0.4 mg B kg-1 bor uygulandığında bitki boyu % 20.7 ve teknik sap uzunluğu % 24.4 oranında artmıştır. Bor uygulanmadığında endüstriyel kenevir bitkisi yaprağında ve lifinde bor konsantrasyonu kritik konsantrasyonun (< 20 mg B kg-1) altında olduğu belirlenirken 0.4 mg B kg-1 uygulandığında yaprakta ve lifte bor konsantrasyonu artmış ve endüstriyel kenevir bitkisi yaprağında belirlenen bor noksanlığı bor uygulaması ile normal düzeye çıkmış ve genç yapraklarda görülen bor noksanlık belirtileri ortadan kalkmıştır.

Anahtar Kelimeler

• endüstriyel kenevir
• sap verimi
• lif verimi
• lif randımani
• bor konsantrasyonu

Kaynakça

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