ACTA AGRICULTURAE BOREALI-SINICA ›› 2020, Vol. 35 ›› Issue (2): 170-177. doi: 10.7668/hbnxb.20190344

Special Issue: Grape

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

Effects of Nitrogen Application Rate in Drip Irrigation on Chlorophyll Fluorescence Characteristics and Carbon Metabolism of Grape in Desert Area

HAN Lina1, MA Zonghuan1, WANG Ying1, HU Zijing1, SHI Xingyun2, MAO Juan1, CHEN Baihong1   

  1. 1. College of Horticulture, Gansu Agricultural University, Lanzhou 730070, China;
    2. Wuwei Academy of Forestry Science, Wuwei 733000, China
  • Received:2019-12-16 Published:2020-04-28

Abstract: In order to study the effects of nitrogen application rate on the photosynthetic characteristics and assimilation product accumulation of Cabernet gernischet grapes at different growth stages, four urea application rates under drip irrigation conditions were set:150(N1), 300(N2), 450 (N3), 600 kg/ha(N4), 0 kg/ha was set to control(CK), the effects of different nitrogen nutrition on photosynthetic fluorescence parameters and carbon metabolism related indexes of grape leaves at growth period (5 days before flowering,20 days after flowering,50 days after flowering) were analyzed. The results showed that appropriate nitrogen application improved the chlorophyll content and RuBp carboxylase activity of leaves, enhanced the photosynthesis of vines, and increased the chlorophyll fluorescence of leaves which represented as the increase of effective photochemical efficiency (Fv'/Fm'), photochemical quenching coefficient (qP) and actual photochemical efficiency of PSⅡ(ΦPSⅡ) and the decrease of non-photochemical quenching coefficient (NPQ) in leaves. Compared with CK, Fv'/Fm', ΦPSⅡ, and qP under N2 treatment in DAF20 and DAF50 were significantly increased by 16.10%, 17.80%, and 21.49%, 21.13%, and 11.77%, 19.73%, respectively.Appropriate nitrogen application increased the activity of sucrose metabolism-related enzymes and soluble sugar content, but decreased starch content.And throughout the growth period, SPS, SS, and sucrose had the highest values under N3, glucose and fructose had the highest values under N2, while NI and AI had the highest values under N2, N2 and N1 respectively under DBF5, DAF20 and DAF50. Compared with CK, N2 treatment increased the content of soluble sugar, tannin, anthocyanin and the titratable acid content, promoted the fruit setting rate and the ratio of sugar to acid with yield of 14.50 t/ha.In conclusion, the application range of urea from 300 to 450 kg/ha enhanced the photosynthesis of leaves, promoted the synthesis of soluble sugars, thus providing sufficient nutrition for the growth and development of grape fruits.

Key words: Grape, Nitrogen, Chlorophyll fluorescence, Carbon metabolism, Yield quality

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Cite this article

HAN Lina, MA Zonghuan, WANG Ying, HU Zijing, SHI Xingyun, MAO Juan, CHEN Baihong. Effects of Nitrogen Application Rate in Drip Irrigation on Chlorophyll Fluorescence Characteristics and Carbon Metabolism of Grape in Desert Area[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(2): 170-177. doi: 10.7668/hbnxb.20190344.

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