Predicting Pepper Fruit Yield Based on Temperature and Solar Radiation
Predicting Pepper Fruit Yield Based on Temperature and Solar Radiation作者机构：Extension Service Ministry of Agriculture Bet Dagan 50250 lsrael R&D Darom Besor Eshko195465 Israel R&D Arava Central and Northern Arava 86825 Israel
出 版 物：《Journal of Agricultural Science and Technology(B)》 (农业科学与技术（B）)
年 卷 期：2014年第4卷第5期
页 面：360-367页
学科分类：07[理学] 070601[理学-气象学] 09[农学] 0706[理学-大气科学] 0902[农学-园艺学] 090201[农学-果树学]
主 题：Sweet pepper greenhouse radiation temperature model fruit yield.
摘 要：Two separate experiments were conducted in bell pepper （Capsicum annum L.） in order to evaluate the effects of temperature and radiation on fruit yield. The results of the temperature experiment were integrated into the radiation experiment to give an overall empirical model for potential pepper fruit yield grown in greenhouse. In the temperature experiment, pepper plants were planted during the summer time of Israel in the Arava region in a commercial, one hectare greenhouse, equipped with a cooling wet-mat system. Eleven plots were assigned along the 80 m down the row from the wet mat. Air seasonal temperatures were affected by the distance from the wet-mat and linearly increased at the rate of 0.036 ℃/m, while relative humidity was not affected. Fruit yield dropped from 19.4 kg/m at a distance of 20 m, to 13.1 kg/m2 at 80 m away from the wet-mat, respectively. Yield regression decreased linearly with increased temperature at -11%/℃. In the radiation experiment, during the summer time of Israel in the Western Negev region, three sweet pepper varieties were grown under six radiation treatments, which accumulated to the following relative global radiation fractions （lint/lout）： 0.72, 0.61, 0.46, 0.38, 0.32 and 0.21 from outside radiation. The three varieties did not differ in their response to radiation. The seasonal temperature normalized yield response to radiation quantity at 21 ℃ （Y21） yielded a linear regression formula with a slope of 7.6 × 10^-3 kg/m^2/MJ. The multiplicative model of temperature and radiation on fruit yield was found to predict well the potential fruit yield for various locations and seasons in Israel.
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