Abstract:

The paper aims to explore the effects of different transplanting dates on pepper's yield, quality and photosynthetic characteristics in Guizhou. Seven transplanting dates were set with the main pepper cultivars ‘Layan No.1’, ‘Zunyi Chaotianjiao’ and ‘Xianjiao 269’ as test materials, the characteristics of the yield structure under different transplanting date were compared. And the relationship between meteorological factors including temperature and precipitation and the growing stage, photosynthetic characteristics, yield structure, quality were also analyzed. The results showed that the average temperature in the growth stage of pepper had the greatest influence on the yield, and the duration of each growth stage was related to meteorological factors. Earlier sowing could prolong the growth stage, increase the diurnal temperature range after pepper flowering stage, and speed up the net photosynthetic rate. The temperature and precipitation mainly affected the plant height, stem diameter, vitamin C, capsaicin, dihydrocapsaicin and other indicators. With the delay of transplanting, the yield of pepper increased first and then decreased gradually, timely and early sowing is beneficial to the increase of pepper yield.

Key words: pepper, meteorological factor, photosynthetic characteristic, yield, quality