| 苏兰茜,白亭玉,鱼欢,吴刚,谭乐和.氮素营养对菠萝蜜幼苗生长及光合荧光特性的影响[J].中国南方果树,2019,48(3): |
| 氮素营养对菠萝蜜幼苗生长及光合荧光特性的影响 |
| Effects of nitrogen nutrition on growth, photosynthesis and chlorophyll fluorescence of jackfruit seedlings |
| 投稿时间：2018-09-03 修订日期：2018-09-27 |
| DOI： |
| 中文关键词: 菠萝蜜 施氮量 生长特性 光合荧光特性 |
| 英文关键词:jackfruit nitrogen nutrition growth characteristics photosynthesis and chlorophyll fluorescence |
| 基金项目:海南省自然科学基金青年(编号：318QN278) |
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| 摘要点击次数: 1831 |
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| 中文摘要: |
| 为探究菠萝蜜幼苗对酰胺态氮肥的需求量的适宜施氮量，本试验以马来西亚1号嫁接苗为试验材料，比较不同氮素水平对菠萝蜜幼苗生长、叶片光合荧光特性的影响。结果表明，随施氮量的增加，菠萝蜜叶片数、株高、茎粗、叶面积、地上部干重、叶片净光合速率、气孔导度、蒸腾速率、叶绿素含量均呈先升高后降低的趋势，且均在施氮量为N1（5 g/株）时达最大值。三个施氮水平的叶片非光化学淬灭系数（NPQ）显著低于N0水平。N1水平的光系统Ⅱ活性（Fv/Fo）显著高于N0，Fv/Fm和Fv/Fo值均是N1>N2（10 g/株）>N3（15 g/株）。N1、N2水平较N0显著增加实际光能转换效率（ΦPSII）和相对电子传递效率（rETR）。其中净光合速率和光系统Ⅱ活性互作对菠萝蜜生物量变化的解释量最大，为39.1%。综上，在本试验条件下，菠萝蜜幼苗适宜的施氮量为5 g/株。 |
| 英文摘要: |
| In order to explore the suitable amino nitrogen application of jackfruit seedlings, this experiment used Malaysian No. 1 grafted seedlings as test materials to compared the effects of different nitrogen levels on the growth, photosynthesis and chlorophyll fluorescence of jackfruit seedlings. The results showed that, with the increase of nitrogen level, the number of leaves, plant height, stem diameter, area of leaf and shoot biomass, net photosynthetic rate, stomatal conductance, transpiration rate and chlorophyll increased at first but decreased after the peak at N1(5 g/plant). The non-photochemical quenching coefficient (NPQ) of three nitrogen application levels was significantly lower than that of the N0 treatment. The PSII activity (Fv/Fo) of N1 is significantly higher than that of N0. The Fv/Fm and Fv/Fo values are both N1>N2(10 g/plant)>N3(15 g/plant). The actual light energy conversion efficiency (ΦPSII) and the relative electron transfer efficiency (rETR) of N1 and N2 levels were significantly higher than that of N0. The interpretation of net photosynthetic rate and PSII activity interactions on the biomass of jackfruit was the largest, accounting for 39.1%. In summary, the proper nitrogen nutrition was 5 g/plant in this experiment. |
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