Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (2): 179-187. doi: 10.7668/hbnxb.20193552

Special Issue: Soil fertilizer

• Resources & Environment · Plant Protection • Previous Articles     Next Articles

Effects of Nitrogen Reduction Combined with Coated Urea on Photosynthetic Characteristics,Yield and Quality of Shine muscat

HU Wenfeng1, ZHOU Xuan2, HUANG Yuelin1, XU Zhangqian1, ZHANG Huiru1, YANG Xiangdong1, PENG Jianwei3   

  1. 1. College of Resources,Hunan Agricultural University,National Engineering Research Center for Efficient Use of Soil and Fertilizer,Changsha 410128,China
    2. Hunan Soil and Fertilizer Institute, Changsha 410125,China
    3. Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China
  • Received:2022-11-01 Published:2023-04-28

Abstract:

To reveal the application effect of controlled release urea in table grape(Shine muscat),and screen out the optimum application amount,a field experiment(2018-2019)was conducted to study the effects of nitrogen(N)reduction combined with polyurethane coated urea on the yield,photosynthetic characteristics and quality of table grapes,and to explore the relationship between chlorophyll content at different leaf positions and quality traits.The results of this study can provide scientific theoretical basis for the cost-saving and efficient utilization of N fertilizer in the cultivation of table grape.The results showed that:compared with the conventional fertilization treatment,the yield of table grape were increased by 10.67%-32.91%,under 0-30% N reduction combined with coated urea treatment,while reduced by 5.79% under 40% N reduction combined with coated urea treatment.Among them,suitable N reduction combined with controlled release fertilizer for table grape had better effect on yield and income increase than conventional fertilization.With the decrease of N application rate combined with coated urea,the yield and net photosynthetic rate of table grapes increased first and then decreased.Correlation analysis showed that there was a significant positive correlation between the mean value of SPAD of functional leaves at the expansion stage and the quality traits(soluble solid,total sugar,vitamin C,sugar-acid ratio and solid-acid ratio),but a significant negative correlation between SPAD value and total acid.In general,N reduction combined with coated urea treatment was beneficial to the formation of yield component,increased SPAD value and net photosynthetic rate of functional leaves at the puffing stage,effectively expand fruit grains,promoted the increase production,saved fertilizer and increased efficiency of table grapes,and improved the food quality of table grapes.The N reduction of 10%-20% combined with coated urea treatment had the best effect.

Key words: Table grape, Shine muscat, Coated urea, Photosynthetic characteristics, Yield, Quality

Cite this article

HU Wenfeng, ZHOU Xuan, HUANG Yuelin, XU Zhangqian, ZHANG Huiru, YANG Xiangdong, PENG Jianwei. Effects of Nitrogen Reduction Combined with Coated Urea on Photosynthetic Characteristics,Yield and Quality of Shine muscat[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(2): 179-187. doi: 10.7668/hbnxb.20193552.

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