| 施肥对银杏叶片光合作用及营养元素质量分数的影响 |
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| 引用本文： | 国靖,汪贵斌,曹福亮.施肥对银杏叶片光合作用及营养元素质量分数的影响[J].浙江农林大学学报,2016,33(6):969-975. |
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| 作者姓名： | 国靖 汪贵斌 曹福亮 |
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| 作者单位： | 南京林业大学 南方现代林业协同创新中心, 江苏 南京 210037 |
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| 基金项目： | “十二五”国家科技支撑计划项目2012BAD21B04江苏省科技支撑计划项目BE2013443江苏高校优势学科建设工程资助项目PAPD |
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| 摘 要： | 采用单因素试验和正交试验方法，研究了不同施肥处理对银杏Ginkgo biloba叶片中的氮、磷和钾质量分数以及新梢叶片光合作用的影响，为银杏用材林的施肥提供理论依据。结果表明:银杏对氮和钾的吸收有协同作用，在氮和钾肥单施时，叶片中氮和钾元素质量分数变化趋势相同。单施磷肥对银杏吸收土壤中的氮和钾有抑制作用，配施时土壤中磷元素高，对氮影响较大，对钾影响较小。在单施处理中，净光合速率均是在氮、磷和钾最大施肥量时达到最大值，不同施肥处理间差异显著（P<0.05），蒸腾速率、气孔导度和胞间二氧化碳摩尔分数变化无规律。配施处理中，蒸腾速率、气孔导度和胞间二氧化碳摩尔分数都是在处理2（氮肥100 g·株-1，磷肥400 g·株-1，钾肥40 g·株-1）达到最大值，净光合速率是在处理5（氮肥200 g·株-1，磷肥400 g·株-1，钾肥90 g·株-1）达到最大值。氮、磷、钾同施能够使土壤元素含量更均衡，促进银杏对营养元素的吸收，提高叶片光合作用效能。图4表6参18
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| 关 键 词： | 植物学 银杏 施肥 光合作用 营养元素 |
| 收稿时间： | 2015-11-24 |
Photosynthesis and nutrient content with fertilization for Ginkgo biloba leaves |
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| GUO Jing,WANG Guibin,CAO Fuliang.Photosynthesis and nutrient content with fertilization for Ginkgo biloba leaves[J].Journal of Zhejiang A&F University,2016,33(6):969-975. |
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| Authors: | GUO Jing WANG Guibin CAO Fuliang |
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| Affiliation: | Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, Jiangsu, China |
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| Abstract: | To provide a theoretical basis for fertilization of ginkgo(Ginkgo biloba) timber forests, nitrogen, phosphorus, and potassium content in ginkgo leaves and photo-biological characteristics of new ginkgo shoots were studied. These factors were related to the rapid growth of trees. An experiment with different fertilizer treatments was designed based on single factor designs and orthogonal designs. Results showed that absorption of N and K in ginkgo was synergistic. The N and K content had the same variation trends when it was single N or K fertilizer. Single P fertilizer had an inhibiting effect on the absorption of N and K. When NPK fertilizer was used, high P content in the soil also had a inhibiting effect on N absorption. Also, fertilization improved the photo-biological characteristics of ginkgo. The net photosynthetic rate (Pn) always reached maximum with single N, P, and K fertilizers. The net photosynthetic rate was significantly different (P<0.05) while the transpiration rate (Tr), stomatal conductance (GS), and intercellular CO2 concentration (Ci) were not significantly different(P>0.05). Treatment 2 had the highest Tr, GS, and Ci value while Treatment 5 had the highest Pn. Thus, for ginkgo combined N, P, and K fertilizer can improve soil elemental balance, promote nutrient absorption, and increase photosynthesis. It suggested that we can use more K to increase the N absorption ability of the tree in the production practice.Ch, 4 fig. 6 tab. 18 ref.] |
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