Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (5): 874-880.DOI: 10.3969/j.issn.1000-2561.2020.05.005

• Crop Culture and Nutrition, Genetic Breeding • Previous Articles     Next Articles

Effect of Different Mulching Methods on Fruit Puffing of Citrus reticulata Blanco cv. Kinokuni During Delayed Cultivation

ZHENG Xiaohua1,WU Di1,LI Chunxia1,ZHANG Bei1,LI Jiangbo2,XIONG Bin2,WANG Ping1,*()   

  1. 1. College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
    2. Fuzhou Nanfeng Citrus Institute, Fuzhou, Jiangxi 344100, China
  • Received:2019-08-12 Revised:2019-09-21 Online:2020-05-25 Published:2020-06-15
  • Contact: WANG Ping

Abstract:

Nanfeng tangerine (Citrus reticulata Blanco cv. Kinokuni) during delayed cultivation in greenhouse was used to investigate the effects of different mulching treatments by combining cover materials and water-retaining agents on the puffing degree of fruit, fruit quality and soil temperature and humidity. In November, mulching treatments increased the content of TSS, TA and vitamin C in fruit, while the combined treatment of reflective film and water-retaining agent significantly improved the content of TSS and TA, 2.30% and 0.27% higher than the control respectively. The puffing degree of the fruits was negatively correlated with Total?Soluble?Solid (TSS), titratable acid (TA) and vitamin C content. In December, the fruits by mulching straw and CK treatments showed lower content of TSS, TA and more puffing. The puffing degree by mulching straw and CK treatments reached 1.67 grade and 1.07 grade respectively, and that for the other treatments was mild, only 0.73 grade. The puffing degree was closely related to fruit weight, TA and vitamin C content. In the following January, the puffing degree was positively correlated with soil humidity with a correlation coefficient 0.879, while TA content was significantly negatively correlated with soil humidity with a correlation coefficient -0.911. The humidity of soil in the combined treatment of reflective film and water-retaining agent was always at the highest level. The TA content decreased rapidly during this period, and the puffing degree showed an accelerated trend. Therefore, it was concluded that higher soil moisture led to more puffing degree, less TSS, TA and vitamin C. It could reduce soil humidity, improve fruit TSS, TA and vitamin C content, delay the occurrence of puffing degree by mulching treatment. Among them, the effect of garden cloth treatment was the best, with the effect of reflective film, carpet and garden cloth+ water-retaining agent followed.

Key words: Nanfeng tangerine (Citrus reticulata Blanco cv. Kinokuni), mulching, fruit puffing, TSS, TA, vitamin C, soil humidity

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