氮磷添加对何首乌生长和叶绿素荧光参数的影响
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摘要
【目的】研究不同氮磷添加处理对何首乌植株生长和叶绿素荧光参数的影响,为促进何首乌生产提供科学施肥的理论指导。【方法】以何首乌幼苗为试材,设置4个处理,分别为对照(CK)、施氮(N:株施尿素2.7 g)、施磷(P:株施过磷酸钙14.4 g)、氮磷共施(N+P:株施尿素2.7 g、过磷酸钙14.4 g),测定不同氮磷添加处理对何首乌生长和叶绿素荧光参数的影响。【结果】氮磷添加处理可促进何首乌生长,对何首乌叶片数、单叶面积、叶柄长、株高的影响程度为:氮磷共施>施磷>施氮>对照;与对照相比,氮磷添加处理均可显著促进何首乌生物量积累,以氮磷共施处理增幅最大,并可显著提高地上生物量占比;氮磷添加处理促进了何首乌叶绿素含量增加,以及Fv/Fm、qP、ETR值升高,降低qN值,以氮磷共施处理的叶绿素含量增幅最大(较对照增加96.08%),qN值降幅最大(较对照降低29.16%)。【结论】相较于对照及单一养分添加,氮磷共施处理能更显著提高何首乌光合效率,促进植株生长。
【Objective】Effects of N and P additions on the growth and chlorophyll fluorescence indices of Polygonum multiflorum were studied to provide a guideline for proper fertilization to promote the plant growth. 【Method】 N and P addition, i.e.,(1) N application using 2.7 g urea/plant,(2) P application using 14.4 g superphosphate/plant,(3) N+P application using 2.7 g urea and 14.4 g superphosphate on each plant, or(4) control without added N or P, was incorporated in the potting soil to observe the resulting growth and chlorophyll fluorescence indices of the plants.【Result】 The treatments increased the leaf count, single leaf area, petiole length, and height of the plants in the order of N+P application>P application>N application> control. The addition of N+P significantly increased the biomass accumulation, proportion of above-ground biomass, and chlorophyll content as well as the indices of Fv/Fm, qP and ETR, with a decreased qN. Compared to control, N+P treatment affected the most on chlorophyll with a 96.08% increase and on qN with a 29.16% reduction. 【Conclusion】Addition of both N and P in the potting soil significantly promoted the growth and photosynthesis of P. multiflorum.
【Objective】Effects of N and P additions on the growth and chlorophyll fluorescence indices of Polygonum multiflorum were studied to provide a guideline for proper fertilization to promote the plant growth. 【Method】 N and P addition, i.e.,(1) N application using 2.7 g urea/plant,(2) P application using 14.4 g superphosphate/plant,(3) N+P application using 2.7 g urea and 14.4 g superphosphate on each plant, or(4) control without added N or P, was incorporated in the potting soil to observe the resulting growth and chlorophyll fluorescence indices of the plants.【Result】 The treatments increased the leaf count, single leaf area, petiole length, and height of the plants in the order of N+P application>P application>N application> control. The addition of N+P significantly increased the biomass accumulation, proportion of above-ground biomass, and chlorophyll content as well as the indices of Fv/Fm, qP and ETR, with a decreased qN. Compared to control, N+P treatment affected the most on chlorophyll with a 96.08% increase and on qN with a 29.16% reduction. 【Conclusion】Addition of both N and P in the potting soil significantly promoted the growth and photosynthesis of P. multiflorum.
引文
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[10]GROOT C C D ,MARCELIS L F M ,BOOGAARD R V D ,et al.Interaction of nitrogen and phosphorus nutrition in determining growth[J].Plant and Soil,2003,248(1-2):257-268.
[11]ELSER J J ,BRACKEN M E S ,CLELAND E E ,et al.Global analysis of nitrogen and phosphorus limitation of primary producers in freshwater,marine and terrestrial ecosystems[J].Ecology Letters,2007,10(12):1135-1142.
[12]ZHENG B S.Effects of potassium on Rubisco,RCAand photosynthetic rate of plant[J].Journal of Zhejiang Forestry College,2002,19(1):104-108.
[13]张艳玲,杨本凤,孙万慧,等.氮钾配施对桔梗品质的影响[J].安徽农业科学,2011,39(6):3253-3254.ZHANG Y L,YANG B F,SHUN W H,et al.Effects of Nitrogen Application combined with Potassium on the Quality of Platycodongrandiflorum (Jacq.)A.DC[J].Journal of Anhui Agricultural Sciences,2011,39(6):3253-3254.(in Chinese)
[14]华水金,杨宇虹,赵菊英,等.氮肥对水田与旱地烤烟叶绿素动态生长及产量的影响[J].土壤肥料,2005(6):31-35.HUA S J,YANG Y H,ZHAO J Y,et al.Effects of nitrogen fertilizer on chlorophyll dynamics,growth and yield of flue-cured tobacco in paddy field and dryland[J].Soil Fertilizer,2005(6):31-35.(in Chinese)
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