Effects of water-nitrogen addition on Jatropha curcas L. physiological characteristics under salt stress
LIU Bing1, YANG Qiliang1*, XU Man2
1.Modern Agricultural Engineering college, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; 2.Bijie City Agricultural Machinery Research Institute, Bijie, Guizhou 551700, China
Abstract：In order to study the effects of different water-nitrogen treatments on the physiological characteristics of Jatropha curcas saplings under salt stress, three levels of irrigation were used(Irrigation volume per irrigation was T1: 3.2 L/plant, T2: 5.4 L/plant, T3: 9.6 L/plant), and 4 nitrogen application levels(NZ: 0 g, NL: 10 g, NM: 30 g, NH: 50 g)were subjected to a greenhouse plot test. The results show that appropriately adding irrigation volume under salt stress can effectively increase the net photosynthetic rate of Jatropha curcas. Under salt stress and without nitrogen application, T2 and T3 can promote the net photosynthetic rate, transpiration rate and stomata of Jatropha curcas. Conductivity, stomatal and leaf-water potentials increase, T3 increases photosynthetic rate compared with T1 and T2. Appropriate soil water-nitrogen regulation help to increase photosynthesis of Jatropha curcas. Under the same conditions of salt stress and irrigation, by comparison with NZ, the net photosynthetic rate, transpiration rate and stomatal conductance of Jatropha curcas under NL, NM and NH increase, and the leaf-water potential decreases. Compared with T3NH, the photosynthetic rate, transpiration rate, stomatal conductance and leaf-water potential of T3NM increase significantly by 5.15%, 5.86%, 8.81%, and 23.25%, respectively. In summary, under salt stress, the optimal treatment for the physiological characteristics of Jatropha curcas is T3NM.
刘冰, 杨启良*, 徐曼. 盐胁迫下水氮处理对小桐子生理特性的影响[J]. 排灌机械工程学报, 2018, 36(8): 679-684.
LIU Bing, YANG Qiliang*, XU Man. Effects of water-nitrogen addition on Jatropha curcas L. physiological characteristics under salt stress. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(8): 679-684.
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