Influence of Organic Enriched Manure and Inorganic Fertilizers on Plant Physiological Processes of Kenyan Tea Clone

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Hassan Kiprotich
Nicholas K. Korir
Nyabundi Karl
Joseph P. Gweyi-Onyango


Tea (Camellia sinensis L.) is one of the most popular beverages consumed in the world and Kenya is the leading exporter in Africa and only 3rd worldwide after China and India. Nutrient deficiency in soils and poor fertilization are possibly two reasons for low yields and quality of tea. The use of organic matter and mineral fertilizers has been proved to be a sound soil amendment and fertility management strategy. Therefore, this study was conducted to evaluate the possibility of using readily available organic manures in combination of inorganic fertilizers on the physiological processes of tea clones in Kenya. The study was conducted within Timbilil estate, KALRO- Tea Research Institute in Kericho County on variety clone TRFK31/8. It was laid out in a Randomized Complete Block Design (RCBD) and replicated three times. There were 14 treatments that randomly assigned in each block. Data on tea response was determined from photosynthesis rate, transpiration rate and stomatal conductance then recorded and analyzed using GenStat Version 15.1. There were significant differences between the treatments on the transpiration rate, stomatal conductance and the photosynthetic rate in both seasons for all the months recorded. The transpiration rate was highest during the wet season in the months of June, July and August while lower transpiration rates were recorded during the dry season in the months of December, January and February with 0.1 g m−2 s−1 transpiration rates recorded in several treatments in the month of February. Stomatal conductance, photosynthetic rate and transpiration rate were higher where NH4+ was introduced through the organic manure in all the seasons and therefore confirms that it is highly important to incorporate soil amendments with higher organic matter in tea production in Kenya.

Tea, physiological processes, organic, manure, stomatal conductance, inorganic fertilizers, photosynthetic rate.

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How to Cite
Kiprotich, H., K. Korir, N., Karl, N., & Gweyi-Onyango, J. P. (2019). Influence of Organic Enriched Manure and Inorganic Fertilizers on Plant Physiological Processes of Kenyan Tea Clone. Asian Journal of Soil Science and Plant Nutrition, 5(3), 1-7.
Original Research Article


Jiang W, Tao ZM, Wu ZG, Mantri N, Lu HF, Liang ZS. Camellia (Theaceae) classification with support vector machines based on fractal parameters and red, green and blue intensity of leaves. Bangladesh Journal of Plant Taxonomy. 2017;24(1):65-81.

Bore JK. A review of problems of old tea fields, Tea. 1996;17(2):27–33.

Gebrewold AZ. Review on integrated nutrient management of tea (Camellia sinensis L.). Cogent Food & Agriculture. 2018;4(1):1543536.

Zhang J. Research on the soil nutrient characteristics of tea plantation. In IOP conference series: Earth and environmental science, IOP Publishing. 2018;208(1):012079.

Obatolu CR. Preliminary result on the comparative effect of nitrogen sources on the growth of tea (Camellia sinensis L.) cuttings. Café, Cacoa. XXIV. 1985;(12): 107-112.

Ipinmoroti RR, Adeoye GO, Makinde EA. Effect of urea-enriched organic manures on soil fertility, tea seedling growth and pruned yield nutrient uptake. Bulgarian Journal of Agricultural Science. 2008;14 (6):592-597.

Geng Y, Cao G, Wang L, Wang S. Effects of equal chemical fertilizer substitutions with organic manure on yield, dry matter, and nitrogen uptake of spring maize and soil nitrogen distribution. PloS one. 2019; 14(7).

Singhl JS, Bisen DK, Bora R Kumar, Bera B. Comparative study of organic, inorganic and integrated plant nutrient supply on the yield of Darjeeling tea and soil health. Tea Research and Development Centre, Tea Board, Kurseong, Darjeeling-734203, West Bengal, India Director (Research), Tea Board of India; 2011.

Tsuji M, Kinoshita T. Effects of liquid fertilizer application under the canopy of Tencha yea garden. Proceeding International O-cha (Tea) Conference, Japan. 2001;198–201.

Owuor PO. Problems of replanting tea or other crops on old tea lands: Possible role of allelochemicals – A review. Tea. 1996; 17(1):34–40.

Andrea MME, Carolina TEA, José CBT, Luis MNJ, Carlos GML. Evaluation of contaminants in agricultural soils in an Irrigation District in Colombia. Heliyon. 2019;5(8):e02217.

Li ZP, Ding DX. China Tea, (Chinese). 1992;14(6):13-15.

Hinkelmann K, Kempthorne O. Design and analysis of experiments, introduction to experimental design. John Wiley & Sons. House, Hanoi. (Vietnamese). 2007;53-129.

Zhou Y, Zhang Y, Wang X, Cui J, Xia X, Shi K, Yu J. Effects of nitrogen form on growth, CO2 assimilation, chlorophyll fluorescence, and photosynthetic electron allocation in cucumber and rice plant. J Zhejiang Univ-Sci B (Biomed & Biotechnol). 2011;12:126–134.

Guo S, Zhou Y, Li Y, Gao Y,and Shen Q. Effects of different nitrogen form and water stress on water use efficiency of rice plants. Ann Appl Biol. 2008;153:127– 134.

Muhammad S, Mohamed MH, Muhammad TM, Tariq A, Muhammad Z, Hamaad RA, Khalid Rehman H, Muhammad S. Differential effect of nitrogen forms on physiological parameters and micronutrient concentration in maize (Zea mays L.). Australian Journal of Crop Science; 2013.

Takai T, Kondo M, Yano, M, Yamamoto T. A quantitative trait locus for chlorophyll content and its association with leaf photosynthesis in rice. Rice. 2010;3:172–180.

Kanai S, Moghaieb RE, El-Shemy HA, Panigrahi R, Mohapatra PK, Itod J, Nguyen NT, Saneoka H, Fujita K. Potassium deficiency affects water status and photosynthetic rate of the vegetative sink in green house tomato prior to its effects on source activity. Plant Sci. 2011;80:368–374.

Ashraf M, Bashir A. Relationship of photosynthetic capacity at the vegetative stage and during grain development with grain yield of two hexaploid wheat (Triticum aestivum L.) cultivars differing. Eur J Agronomy. 2003;19:277-287.

Long SP, Zhu XG, Naidu SL, Ort DR. Can improvement in photosynthesis increase crop yields? Plant Cell Environ. 2006; 29:315-330.

Lawlor DW, Mohotti AJ. Diurnal variation of photosynthesis and photoinhibition in tea: effects of irradiance and nitrogen supply during growth in the field. J. Exp. Bot. 2002;53:313-322.