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中国农学通报

中国农学通报 ›› 2014, Vol. 30 ›› Issue (1): 248-253.doi: 10.11924/j.issn.1000-6850.2013-1310

所属专题： 园艺

• 林学 园艺 园林 • 上一篇    下一篇

土壤水分胁迫对不同茶树品种光合作用及水分利用率的影响

唐劲驰 黎健龙 唐颢 曾浩   

  • 收稿日期:2013-05-07 修回日期:2013-07-15 出版日期:2014-01-05 发布日期:2014-01-05
  • 基金资助:
    国家科技支撑计划 “茶叶质量安全与茶园标准化生产关键技术的研究与示范” (2011BAD01B02)。

Photosynthetic Characteristics and Water Use Efficiency of Tea Plant Under Different Soilmoisture Condition

  • Received:2013-05-07 Revised:2013-07-15 Online:2014-01-05 Published:2014-01-05

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摘要： 针对华南茶区存在的季节性缺水问题，研究分析了不同茶树对土壤水分的适应性，为配套栽培措施提供理论依据。试验采用盆栽方法研究正常供水（土壤含水量为田间最大持水量的75%）、轻度水分胁迫(55%)、中度水分胁迫(35%)和重度水分胁迫(20%)条件下，5个茶树品种‘黄棪’、‘金萱’、‘英红九号’、‘鸿雁12号’、‘青心1号’1年生幼苗光合作用及其水分利用效率(WUE)的变化。结果表明，不同土壤水分处理对茶树净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)、WUE等生理指标均产生明显影响；水分胁迫下茶树的Pn、Tr、Gs都下降，WUE均值的降幅比Pn的小。‘英红九号’在水分胁迫下Pn、WUE降低幅度均最大，T3处理时Pn的均值为1.47μmolCO2/(m2·s)，比CK下降80%，WUE平均值比CK降低51.5%；生长在同一生境中的‘金萱’、‘鸿雁12号’、‘青心1号’对土壤水分的生态适应能力较强，‘英红九号’最弱，在进行品种推广时需注意相应栽培技术配套。

关键词: 景观设计, 景观设计

Abstract: To solve seasonal water shortage in south China, different tea plant adaptability to soil moisture were analyzed in this paper which can provide a theoretical guide of tea plant cultivation. In experiments under different conditions of soil moisture that normal supply (soil moisture was 75% field water holding capacity), mild water stress (55% ), moderate water stress (35% ) and severe water stress (20% ), photosynthetic characteristics and water use efficiency (WUE) of 1-year-old seedlings of five tea varieties (Camellia sinensis‘Huangdan’,‘JinXuan’,‘YingHong 9th’,‘HongYan 12th’and‘QingXin 1st’) were researched in pot experiments. The results tested that photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), WUE and other physiological factors showed significant impact on different soil water treatment. Under water stress Pn, Tr, Gs of tea plant decline and the mean value of WUE decline smaller than Pn. The Pn and WUE of‘Yinghong 9th’decreased fastest. Mean Pn value was 1.47μmolCO2/(m2·s) in T3 treatment that reduced 80% than CK and mean WUE reduced 51.5% than CK. In the same conditions‘Jinxuan’,‘Hongyan 12th’and‘Qingxin 1st’showed better ecological adaptability to soil water moisture and‘Yinghong 9th’was the weakest. Cultivation techniques supporting should be matched in varieties promotion.