Efficiency of application of meso and microfertilizers on tea plantations in the Russian subtropics

The economic efficiency of using macro (NPK) and micronutrient fertilizers (Mg, Ca, B, Zn) in full-grown tea plants (Camellia sinesis (L.) O. Kuntze) has been studied in a long field experiment in the conditions of the Black Sea coast of Sochi. According to generalized data for the period 2011-2015 it has been shown that the use of boron, a mixture of elements (Zn + B + Mg), and options with the addition of calcium and zinc in favorable weather conditions have led to an increase in productivity by 35, 22 and 17%, respectively. The increase in productivity has increased profits by 80-180 thousand rubles. The positive effect of the introduction of magnesium manifested in the first years of the experiment, is no longer observed.

The cost of introducing only meso and micronutrient fertilizers ranged from 0.45 to 22.0 % of the amount of additional production costs. The analysis of economic efficiency has shown that the use of fertilizers in tea growing is beneficial, since the level of profitability on all options exceeds 25%, and the use of boron and a mixture of elements increases the profitability of production to 37-38 %, which is a significant value for the tea industry.

1. Sheudzhen A.Kh., Trubilin I.T., Onishchenko L.M. Fertilizers and evaluation of the economic efficiency of their use: a training manual. Krasnodar: KubSAU, 2012. 331 p.

2. Tea culture in the USSR / M.K. Daraselia [et al.]; ed. by R.D. Pantskhava. Tbilisi: Metsniereba, 1989. 555 p.

3. Tuov M.T. Scientific basis for improving the quality and productivity of tea plantations in Russia: dis. ... Dr. of Agricult. sciences. Sochi, 1997. 417 p.

4. Belous O.G. Trace elements in tea plantations of subtropics of Russia. Krasnodar: KSAU, 2006. 164 p.

5. Malyukova L.S. Optimization of brown forest soils fertility and the use of mineral fertilizers when growing tea in the conditions of the Black Sea coast of Russia: dis. ... Dr. Biol. Sciences, Sochi, 2013. 343 p.

6. Panda Comparative Effect of Ca, K, Mn and B on Post-Drought Stress Recovery in Tea [Camellia sinensis (L.) O Kuntze] / Hrishikesh Upadhyaya, Biman K. Dutta, Lingaraj Sahoo, Sanjib K. // American Journal of Plant Sciences. 2012. No. 3. P. 443-460.

7. Effect of calcium on antioxidant enzymes of lipid peroxidation of Soybean leaves under water stress. J. / Gao X. Y [et al] // South China Agric. Univ. 1999. No. 2. P. 58-62.

8. Bowler C., Fluhr B. The role of calcium and activated oxygen as signals for controlling cross-tolerance // Trendplantsci. 2000. No. 5. P. 241-243.

9. Economic analysis / ed. by N. Voitolovsky, A.P. Kalinina, I.I. Masurova. 4th ed., revised and add. M.: Yurayt, 2017. 548 p.

10. Velikiy A.V. The influence of meteorological conditions on the productivity of a tea plant against the background of macro and micronutrient fertilizers // Fruit growing and berry growing. 2016. V. 47. P. 62-70.