The effect of climate change on pulses yields in Iran

Present study is aimed to assess the climate change effects on selected pulses (peas, beans and lentils) yields in Iran. In this way, meteorological and agronomical data are received from Iran meteorological organization and ministry of agriculture jihad respectively according to 336 counties of Iran in 1392 year. To distinguishing between dry and irrigated cultivation of pulses, tow regressions are estimated for each of them. According to results, temperature has no effect on pulses yield, but its standard deviation affects dry lentils yield positively and irrigated lentils, dry beans and irrigated peas yields negatively. Precipitation has positive effect on dry pulses yields as expected, but it has no effect on irrigated pulses. Standard deviation of precipitation has negative effect on dry beans yield. More humidity increases dry lentils and irrigated beans yields, but decreases irrigated lentils and irrigated peas yields. Also humidity standard deviation affects pulses yields. Wind speed has no effect on pulses yields, but its standard deviation has positive effect on dry lentils yield. So, it is recommended that pulses production regions with low predicted precipitation in the future, consider water management methods more than before. In this way, reduction of precipitation can be replaced by increasing of irrigation. On the other hand, it is recommended that research organizations consider producing varieties that are resistant to precipitation reduction. Moreover, regarding that more studies have considered temperature and precipitation only, this study shows the necessity of attention to other meteorological variables such as humidity and wind speed.

کلیدواژه ها:

climate change ، irrigation ، pulses ، yield