밤나무 주요 4품종의 개화 및 화밀 특성 분석

다국어 초록 (Multilingual Abstract)

In order to provide a basic data of Castanea spp. as a honey plant, flowering time and nectar characteristics were investigated using Korean prevailing chestnut cultivars: ‘Daebo’, ‘Okkwang’, ‘Riheiguri’ and ‘Tsukuba’ planted in clonal archive in Hwaseong city. There were differences among four cultivars in the beginning of flowering and the end of the flowering. In 2015, female flower bloomed approximately eight days earlier than the male flower. Also, there were differences among four cultivars in nectar volume per catkin as the values were 54.3μl and 6.7μl in ‘Okkwang’ and ‘Daebo’, respectively. On the contrary, in the sugar content, the values were 15.6μg/μl and 69.3μg/μl in Okkwang and Daebo, respectively. Therefore, it is possible to assume the sugar content per catkin using the total nectar per catkin and the total amount of free sugars. Based on the formula, we estimated the values: Tsukuba was 1401.6μg; Okkwang was 777.5μg; Riheiguri was 708.9μg; and Daebo was 486.4μg. Moreover, we investigated the amino acid content. The result was that proline, glutamic acid, asparagine, and alanine were major amino acids in four cultivars. Also, C. spp. showed different values in many aspects such as catkin morphology, nectar characteristics, sugar content, and amino acid content. The sugar content per catkin which determines a honey yield considered, it is believed that Tsukuba is highly valued as a honey tree. It would be needed to further study related to the nectar characteristics of female flower to exactly estimate the total nectar volume per tree and the total honey yield per tree.

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