차광 처리에 따른 국산 밀의 생육 및 수량특성

초록

This study was conducted from November 2025 to June 2026 at the experimental farm of Sunchon National University to compare the growth, vegetation indices, photosynthesis-related physiological responses, and yield characteristics of Korean wheat cultivars under shading conditions simulating low-light environments associated with climate change. Two major Korean wheat cultivars, ‘Saegeumgang’ and ‘Hwanggeumal’, were used, and three shading treatments were established: no shading, 20% shading, and 35% shading. As shading intensity increased, plant height and leaf area index (LAI) increased in both cultivars, while the photochemical efficiency of photosystem II was maintained at relatively high levels. In contrast, the number of spikes, 1,000-grain weight, shoot dry weight, and grain yield decreased. The grain yield of ‘Saegeumgang’ decreased from 553.8 ㎏/10a under no shading to 498.4 and 454.1 ㎏/10a under 20% and 35% shading, respectively, representing reductions of 10.0% and 18.0%. Similarly, the grain yield of ‘Hwanggeumal’ decreased from 443.2 ㎏/10a under no shading to 407.7 and 376.7 ㎏/10a, corresponding to reductions of 8.0% and 15.0%, respectively. The total crop duration of ‘Saegeumgang’ increased by 3 and 5 days under 20% and 35% shading, respectively, compared with 202 days under no shading. Similarly, the crop duration of ‘Hwanggeumal’ increased by 3 and 6 days, respectively, compared with 203 days under no shading, indicating that harvesting was delayed as shading intensity increased. These results suggest that prolonged low-light conditions may not only reduce wheat yield but also delay the sowing of subsequent crops, thereby reducing the stability of double-cropping systems. Therefore, selecting cultivars adapted to low-light conditions and establishing cultivation practices that minimize delays in crop maturity are necessary.

키워드