| 不同供钾水平对茶树幼苗叶片光合作用的影响 |
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| 引用本文： | 林郑和,钟秋生,陈常颂*,陈志辉,游小妹.不同供钾水平对茶树幼苗叶片光合作用的影响[J].茶叶科学,2013(3). |
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| 作者姓名： | 林郑和 钟秋生 陈常颂* 陈志辉 游小妹 |
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| 作者单位： | 福建省农业科学院茶叶研究所,福建 福安 355000 |
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| 摘 要： | 以10月龄扦插"瑞香"茶苗Camellia sinensis(L.)O.Kuntze cv.Ruixiang]为试验材料,通过沙培试验,设5个K浓度(0、100、200、600、2 000μmol/L),每周施肥3次,处理后24周,利用LI-6400便携式光合作用测定仪进行测定。结果表明,缺钾时茶树叶片CO2同化速率、气孔导度、水分利用率等都显著下降,而胞间CO2浓度显著增加;缺钾条件下茶树生物量、叶片钾含量、叶绿素等都显著下降。当供钾浓度为0、100μmol/L时(叶片钾含量6.63 mg/g、6.85 mg/g),茶树出现缺钾症状。
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| 关 键 词： | 茶树 缺钾 光合作用 叶绿素 |
Effects of Different Potassium Level on Leaf Photosynthesis of Tea Seedling |
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| Abstract: | Vegetative propagated 10-month-old tea Camellia sinensis(L.) O.Kuntze cv.Ruixiang] seedlings grown in pots were fertilized three times weekly for 24 weeks with nutrient solution containing 0,100,200,600 or 2 000 μmol/L potassium.The portable photosynthesis system(LI-6400) was used to determine leaf photosynthesis of tea.The result showed that K-deficient leaves showed decreased CO2 assimilation and stomatal conductance,water use efficiency but increased intercellular CO2 concentration.Result also showed that biomass,content of K and chlorophyll were decreased in K-deficient leaves.The tea seeding appeared potassium deficiency symptoms when fertilized with nutrient solution containing 0,100 μmol/L potassium(K content of leave 6.63 mg/g,6.85 mg/g). |
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| Keywords: | tea plant K deficiency photosynthesis chlorophyll |
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