ZHANG Long-fei,SHU Liang-zuo.Effect of Nitrogen Forms on the Photosynthesis of Tomato Under Alternate Partial Root-zone Irrigation[J].HEILONGJIANG AGRICULTURAL SCIENCES,2016,(06):31-36.[doi:10.11942/j.issn1002-2767.2016.06.0031]
局部根区灌溉下氮形态对番茄光合作用的动态调节
- Title:
- Effect of Nitrogen Forms on the Photosynthesis of Tomato Under Alternate Partial Root-zone Irrigation
- 文章编号:
- 1002-2767（2016）06-0031-06
- 分类号:
- S641.2
- 文献标志码:
- A
- 摘要:
- 为探讨局部根区灌溉下氮形态对番茄光合作用的动态调节,设置番茄分根培养试验，研究不同灌水方式（正常灌溉、交替根区灌溉、固定根区灌溉）下不同氮形态（铵态氮、硝态氮）对苗期番茄光合指标、叶绿素含量、生物量和水分利用效率的影响。结果表明：局部根区灌溉下，相较于硝态氮，铵态氮可显著增强苗期番茄的光合速率，提高植株的水分利用效率。一个交替周期内，与正常灌溉相比，交替灌溉仍可维持较高的光合速率和生物量，而蒸腾速率显著降低，从而提高了水分利用效率；番茄的净光合速率和叶绿素含量不断降低。因此，综合考虑生物量、光合速率、蒸腾速率和水分利用效率，则灌溉方式为交替灌溉，供应铵态氮处理更有益于番茄的苗期生长，提高苗期番茄的水分利用效率。
- Abstract:
- The effect of nitrogen forms(ammonium-N and nitrate-N) on the photosynthesis，the content of chlorophyll,biomass and water use efficiency of tomato under alternate partial root-zone irrigation(conventional irrigation,alternate partial root-zone irrigation and fixed partial root-zone irrigation) were analyzed in a split-root experiment.The results showed that compared with the nitrate-N treatment,ammonium-N promoted net photosynthetic rate,water use efficiency of tomato in seeding stage under alternate partial root-zone irrigation in one alternate cycle.Under the same nitrogen form,the net photosynthetic rate and biomass were significantly higher in APRI treatment than that of the conventional irrigation,but the transpiration rate was lower than that of conventional irrigation.In one alternate cycle,the net photosynthetic rate and chlorophyll content of tomato leaves decreased.The experimental results suggested that the APRI(alternate partial root-zone irrigation) treatment with the ammonium-N supply would be better option for the growth and water use efficiency of tomato in seeding stage,in regarding to biomass,photosynthetic rate,transpiration rate and water use efficiency.
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备注/Memo
收稿日期：2016-04-29