关键词: 罗汉果, 硅肥, 光合特性, 果实品质

Abstract: In this paper, the effects of silicon application on the photosynthetic characteristics and fruit quality of Siraitia grosvenorii were studied by setting 5 kinds of gradient silicon fertilizer as base fertilizer to provid basis for high quality and high yield of Siraitia grosvenorii in eastern Guizhou areas. The results showed that photosynthetic pigments(chlorophyll a, chlorophyll b and carotenoids), net photosynthetic rate, fruit size(longitudinal diameter and transverse diameter), dry weight of fruit and content of  Siraitia grosvenorii mogroside V all presented a tendency of  first increase then decline along with the increase in amount of silicon fertilizer. The net photosynthetic rate of Siraitia grosvenorii was improved significantly at 11∶00 am and 13∶00 pm, and the utilization coefficient of light energy was significantly improved by applying silicon fertilizer. Meanwhile, the application of silicon fertilizer could remarkably increase the single fruit dry weight and content of mogroside V. Silicon fertilizer had the best effect when the applying quantity was 150 g/plant, then the single fruit dry weight of Siraitia grosvenorii and its mogroside V content were increased by 10.6% and 16.1%, respectively than that of the contrast.

Key words: Siraitia grosvenorii, silicon fertilizer, photosynthetic characteristic, fruit quality