Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (8): 79-83.doi: 10.11924/j.issn.1000-6850.casb2020-0271

Special Issue: 园艺

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Fertilization System of Nutrient Critical Value for Optimum Yield of Tea Plantation in South Yunnan

Chen Jianfeng1(), Liu Jun2, He Zhenghai3, Chen Hua1, Yin Mei1, Wang Zhiyuan1, Wang Wei1, Fu Libo1()   

  1. 1Institute of Agricultural Environment and Resources, Yunnan Academy of Agricultural Sciences, Kunming 650205
    2Agricultural and Rural Bureau of Yunlong County, Yunlong Yunnan 672708
    3Agricultural Mechanization Technology Promotion Station of Funing County, Wenshan Yunnan 663400
  • Received:2020-07-20 Revised:2020-12-10 Online:2021-03-15 Published:2021-03-16
  • Contact: Fu Libo E-mail:jianfchen@163.com;1198276883@qq.com

Abstract:

To study the precision fertilization amount of tea plant in south Yunnan, a field experiment was conducted to investigate the relationship of the seasonal fertilizer application amount and soil nutrients with tea yield and net output. The results showed that the highest yield of tea was obtained by treatment N2P2K2 in different experiment sites. In different sites, soil nutrients (alkaline hydrolyze nitrogen, available phosphorus and available potassium) and tea yield of fertilizer deficiency treatment had positive correlations. The regression equations between soil nutrient correlation coefficient and soil nutrient contents could be expressed as: yN=1.888-0.30ln(xN), yP=1.551-0.58ln(xP) and yK=0.786-0.13ln(xK). The nutrient critical value for optimum tea yield in south Yunnan was calculated according to the optimum fertilizer application rate and the levels of available nutrients in the soil. The nutrient critical values of tea plant could be calculated as: N (412.5±25.0) kg/hm 2, P2O5 (88.5±27.1) kg/hm2 and K2O (180.2±27.7) kg/hm2.

Key words: tea plantation, tea yield, NPK, soil nutrient correlation coefficient, nutrient critical value for optimum yield

CLC Number: