[Objective] The aim was to research effects of high temperature stress on pepper yield by cultivation of peppers in different genotypes and provide theoretical references for pepper breeding and high-yield cultivation...[Objective] The aim was to research effects of high temperature stress on pepper yield by cultivation of peppers in different genotypes and provide theoretical references for pepper breeding and high-yield cultivation. [Method] Four pepper va- rieties were studied with varied genotypes to explore effects of temperatures on pepper fruiting and yield in the whole growth stage. [Result] The optimal-temperatre term for pepper blooming and fruiting were shorter. For example, the periods from June 16 to July 15 and from August 16 to September 15 would be the best, with temperature ranging from 20.70 ℃ to 30.74 ℃. In the stage from July 16 to August 15, the temperature range of 24.22 ℃-32.17 ℃ would severely affect pepper growth and yield. Pepper No. 1 and pepper No. 1-1＇s yields were just 38.21% and 51.74% of the yields in the stage 1st and 52.01% and 62.35% in the stage 3rd and eady No. 1 and late No. 1 were 48.1% and 72.38%, respectively. Under high tem- perature stress in summer, pepper No. 1, pepper No. 1-1, and late No. 1 showed extremely significant differences with early No. 1 （P〈0.01）. The yield ratios of pep- per No. 1 and pepper No. 1-1 in stage 1st （May 25-July 15） and the later three stages were 42.34：57.66 and 39.50：60.50; the ratio was 47.99：52.21 of early No. 1; the ratio of late No. 1 was 20.25：79.75. [Conclusion] The cultivation approaches should vary upon pepper variety, necessitating the focus on pepper management, fertilization, and irrigation, and locating peak-blooming term in moderate-temperature stage to accelerate pepper growth.展开更多
基金Supported by Jiangsu Agricultural Science and Technology Self-raising Fund(00-05-10-30)~~
文摘[Objective] The aim was to research effects of high temperature stress on pepper yield by cultivation of peppers in different genotypes and provide theoretical references for pepper breeding and high-yield cultivation. [Method] Four pepper va- rieties were studied with varied genotypes to explore effects of temperatures on pepper fruiting and yield in the whole growth stage. [Result] The optimal-temperatre term for pepper blooming and fruiting were shorter. For example, the periods from June 16 to July 15 and from August 16 to September 15 would be the best, with temperature ranging from 20.70 ℃ to 30.74 ℃. In the stage from July 16 to August 15, the temperature range of 24.22 ℃-32.17 ℃ would severely affect pepper growth and yield. Pepper No. 1 and pepper No. 1-1＇s yields were just 38.21% and 51.74% of the yields in the stage 1st and 52.01% and 62.35% in the stage 3rd and eady No. 1 and late No. 1 were 48.1% and 72.38%, respectively. Under high tem- perature stress in summer, pepper No. 1, pepper No. 1-1, and late No. 1 showed extremely significant differences with early No. 1 （P〈0.01）. The yield ratios of pep- per No. 1 and pepper No. 1-1 in stage 1st （May 25-July 15） and the later three stages were 42.34：57.66 and 39.50：60.50; the ratio was 47.99：52.21 of early No. 1; the ratio of late No. 1 was 20.25：79.75. [Conclusion] The cultivation approaches should vary upon pepper variety, necessitating the focus on pepper management, fertilization, and irrigation, and locating peak-blooming term in moderate-temperature stage to accelerate pepper growth.
