Abstract

Ukrayna'nın bozkır bölgesindeki endemik Moehringia hypanica Gryn & Klokov türünün ekolojik-edafik ve morfolojik özellikleri ile popülasyonlarının durumu araştırılmıştır. Labo-ratuvar çalışmalarının sonuçlarına göre, M. hypanica türünün yetiştiği toprağın humus içeri-ği yüksektir ve %7,35-8,23 arasındadır. Araştırmamızın sonuçlarına göre, toprağın hareketli besin maddelerinin mevcudiyeti, Mg, P₂O₅ konsantrasyonlarının çok yüksek ve sırasıyla 8,5-15,0 mg/kg, 129,6-164,5 mg/kg’dır. Ca konsantrasyonu yüksek ve çok yüksek olduğu-nu ve 12,5-27,5 mg/kg'a karşılık geldiğini göstermiştir. Substratın N içeriği her iki örnekte de yüksektir (256,2-268,8 mg/kg) ve S konsantrasyonu çok düşük ila düşük arasında de-ğişmiştir (1,3-4,8 mg/kg). Bu, substratta yüksek miktarda Mg, P₂O₅, Ca bulunduğunu ve incelenen bitkilerin başarılı bir şekilde büyümesi için sınırlayıcı bir faktör olduğunu göster-mektedir. Su özütünün katyonik ve anyonik bileşiminin analizi, toprağın tuzsuz olarak sınıflandırıldığını göstermiştir (tuzların toplamı %0,1'i geçmez). Tüm tuzların içeriği toksisi-te eşiklerini aşmamaktadır. Bu endemik bitkilerin popülasyonlarını korumak için, substratın istikrarlı bir kimyasal bileşimini korumak ve insan müdahalesini önlemek gerektiği tespit edilmiştir. Keşif araştırması sırasında, popülasyonlara genç generatif ve orta generatif bitki-lerin hakim olduğunu, az sayıda yaşlı generatif ve bakir bireylerin bulunduğu gözlemlenmiş-tir.

Morphostructure of Moehringia hypanica Gryn & Klokov in the Buzky Gard National Nature Park, Ukraine

Abstract

The ecological-edaphic and morphological features and the state of populations of the endemic species Moehringia hypanica Gryn & Klokov within the steppe zone of Ukraine were investigated. According to the results of laboratory studies, the humus content of the soil where M. hypanica grows is high, amounting to 7.35-8.23%. According to the results of our research, the availability of soil mobile nutrients showed that the concentrations of Mg, and P₂O₅ were very high, and 8.5-15.0 mg/kg, 129.6-164.5 mg/kg, respectively, and Ca concentration was high and very high, which corresponds to 12.5-27.5 mg/kg. The N concentration of the substrate increased in the samples (256.2-268.8 mg/kg), and the S concentration varied between very low and low (1.3-4.8 mg/kg). This indicated high concentrations of Mg, P₂O₅, and Ca in the substrate and as a limiting factor for the successful growth of the studied plants. The analysis of the cationic and anionic composition of the water extract showed that the soil was classified as non-saline (the sum of salts did not exceed 0.1%). The content of all salts did not exceed the toxicity thresholds. It has been established that in order to preserve the populations of this endemic plant, it is necessary to maintain a stable chemical composition of the substrate and prevent human intervention. During the expeditionary research, we noted that the populations are dominated by young generative and medium generative plants, with a small number of old generative and virgin individuals.

Keywords

• Endemic plant
• Soil
• Environmental factors
• Flower
• Fruit

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