土壤水分对不同季节番茄叶片水和二氧化碳交换特性的影响

应用生态学报

土壤水分对不同季节番茄叶片水和二氧化碳交换特性的影响

高方胜^1,2;徐坤¹;王磊³;苏华¹;徐立功¹

¹山东农业大学园艺科学与工程学院，山东泰安 271018;
²德州学院农学系，山东德州 253000；
³德州农业科学研究院，山东德州 253000

收稿日期:2006-03-13 修回日期:2006-11-27 出版日期:2007-02-10 发布日期:2007-02-10

Effects of soil water content on H₂O and CO₂ exchange in tomato leaves in different seasons

GAO Fang-sheng^1，2; XU Kun¹; WANG Lei³; SU Hua¹; XU Li-gong¹

¹College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an
271018, Shandong, China；
²Department of Agriculture, Dezhou University, Dezhou 253000, Shandong, China;
³Dezhou Academy of Agricultural Science, Dezhou 253000, Shandong, China

Received:2006-03-13 Revised:2006-11-27 Online:2007-02-10 Published:2007-02-10

摘要/Abstract

摘要： 以番茄品种“L402”为试材，研究了土壤水分对不同季节番茄光合及蒸腾特性的影响.结果表明:全生育期内春番茄光合速率（P_n）和蒸腾速率（T_r）均以土壤相对含水量80％处理最高，65％处理次之，50％处理最低；土壤水分降低，显著改变了番茄P_n和T_r的日变化动态，导致光合午休加重；叶片水分利用效率（WUE）以65％处理最高.冬番茄在全生育期内P_n和T_r以50％处理最低，但65％和80％处理无显著差异，且均无光合午休；WUE则以50％处理最高，80％处理最低，说明不同季节番茄对土壤水分的反应存在显著差异.春番茄与冬番茄的P_n及T_r日变化规律显著不同，且在相同土壤水分条件下，春番茄P_n及T_r显著高于冬番茄.

关键词: Frankia, 自然环境胁迫, 基因多样性

Abstract: With tomato variety “L402” as test crop, this paper studied its photosynthetic and tran-spiration characteristics in different seasons under different soil water contents. Three treatments were installed, i . e ., 80% (Ⅰ), 65% (Ⅱ) and 50% (Ⅲ) soil water content. The results showed that when cultivated in spring, the photosynthetic rate (P_n) and transpiration rate (T_r) of tomato leaves were the highest in treatment Ⅰ, followed by treatmentsⅡ and Ⅲ, while the water utilization efficiency (WUE) was the highest in treatment Ⅱ. The decrease of soil water content changed the diurnal variations of P_n and T_r significantly, and aggravated the midday depression of photosynthesis. The tomato growing in winter had the lowest P_n and T_r in treatment Ⅲ, while no difference was observed between treatments I and II.No midday depression of photosynthesis was found among the three treatments. The WUE was the highest in treatment Ⅲ, and the lowest in treatment Ⅰ. All of these suggested that the tomato plants cultivated in different seasons had differ-ent responses to soil water content. The diurnal variations of their P_n and T_r were significantly differ-ent, and the P_n and T_r of spring tomato were significantly higher than those of winter tomato under the same soil water content.

Key words: Frankia, Natural stress, Genetic diversity

高方胜^1,2;徐坤¹;王磊³;苏华¹;徐立功¹. 土壤水分对不同季节番茄叶片水和二氧化碳交换特性的影响[J]. 应用生态学报.

GAO Fang-sheng^1，2; XU Kun¹; WANG Lei³; SU Hua¹; XU Li-gong¹ . Effects of soil water content on H₂O and CO₂ exchange in tomato leaves in different seasons[J]. Chinese Journal of Applied Ecology.

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