his study was carried out to select a new winter green cultivar out of many gene sources of Korean native boxwood (Buxus microphylla var. koreana Nakai). Average percentage of germination was 60% for Korean boxwood. After four years of individual selection, a new winter green cultivar was selected and named `Hanlim´ (Buxus microphylla var. koreana `Hanlim´), which was very hardy and had good winter foliage color. Following physiological chracteristics were observed in between the native winter brown and new `Hanlim´ cultivar. The `Hanlim´ cultivar had higher contents of chlorophyll and higher rate of photosynthesis as compared with native cultivar. As to the period of browning, new `Hanlim´ cultivar stayed green even after November 22, 1989, while the foliage of native cultivar turned to yellowish brown through the winter.
The contents of nitrogen and potassium of `Hanlim´ cultivar were significantly higher than those of the native cultivar. However, native cultivar had higher rate of phosphorus, magnessium, and calcium.
|