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 AJPS  Vol.5 No.18 , August 2014
Effects of Foliar Fertilizer Application on Quality of Tea (Camellia sinensis) Grown in the Kenyan Highlands
Abstract: In Kenya, foliar fertilizers have not found use in tea production despite their numerous advantages as exhibited in other crops. A fertilizer trial test was established in three sites of the major tea growing regions, with 36 plots per site to determine the effects of foliar fertilizer application on tea quality. Two foliar fertilizers were tested; foliar fertilizer 1 (FF1) and foliar fertilizer 2 (FF2), with a positive control of soil fertilizer (SF) and a blank. Two leaves and a bud tea samples were collected every two weeks after each foliar fertilizer application. These were then analyzed for tea quality (total polyphenols, TP), nutrient residues for the different clones and geographical locations. The TP contents for clone TRFK 31/8 were as follows: FF1 = 17.8%, FF2 = 17.9%, SF = 16.56% and Zero = 17.4%. Tukey-Kramer pair wise comparison test results between the foliar fertilizers and SF showed that the FF1 (HSD = 4.78) and FF2 (HSD = 5.27) fertilizers had significantly (P < 0.05) higher levels of TP content as compared to control SF fertilizer. Nutrients analyzed had average means as follows: N = 4% - 5%, P = 0.25% - 0.28%, K = 1.35% - 1.69%, Ca = 0.3 - 0.5 ppm, Mg = 0.19 - 0.27 ppm, Mn = 0.05 - 0.13 ppm, Zn = 25 - 40.5 ppm, Cu = 11 - 17 ppm and Fe = 72 - 122 ppm. The nutrient residue levels had non-significantly statistical differences at P < 0.05 level between pairs of zero applied plots and the FF1, FF2 and SF applied plots respectively. It was concluded that the foliar fertilizers increased the TP content in tested tea samples and the nutrients analyzed were all within the dietary reference intake (DRI) levels for SF, FF1 and FF2. Overall, the foliar fertilizer increased the quality of the tested tea samples.
Cite this paper: E. Njogu, R. , Kariuki, D. , M. Kamau, D. and Wachira, F. (2014) Effects of Foliar Fertilizer Application on Quality of Tea (Camellia sinensis) Grown in the Kenyan Highlands. American Journal of Plant Sciences, 5, 2707-2715. doi: 10.4236/ajps.2014.518286.
References

[1]   Woldegebriel, D. (2007) Levels of Essential and Non-Essential Metals in Commercially Available Ethiopian Black Teas. MSc Thesis, Addis Ababa University, Ethiopia.

[2]   Drinnan, E. (2008) Fertilizer Strategies for Mechanical Tea Production. RIRDC Publication No. 08/030.

[3]   Anonymous (2002) Tea Growers Hand Book. 5th Edition, Tea Research Foundation of Kenya, Elizer Services Publishers, Times Printing Services, Nairobi.

[4]   Karak, T. and Bhagat, R. (2010) Trace Elements in Tea Leaves, Made Tea and Tea Infusions: A Review. Food Research International, 43, 2234-2252.
http://dx.doi.org/10.1016/j.foodres.2010.08.010

[5]   Bonheure, D. and Willson, K. (1992) Mineral Nutrition and Fertilizers. In: Willson, K. and Clifford, M., Eds., Tea: Cultivation to Consumption, Chapman and Hal, London, 269-329.
http://dx.doi.org/10.1007/978-94-011-2326-6_9

[6]   Cheruiyot, E., Mumera, L., Ng’etich, W., Hasanali, A. and Wachira, F. (2009) High Fertilizer Rates Increase Susceptibility of Tea to Water Stress. Journal of Plant Nutrition, 33, 115-129. http://dx.doi.org/10.1080/01904160903392659

[7]   Kuepper, G. (2003) Foliar Fertilization. NCAT Agriculture Specialist. ATTRA Publication#CT13.

[8]   Hara, Y., Luo, S., Wickremashinghe, R.L. and Yamanishi, T. (1995) Special Issue on Tea. Food Reviews International, 11, 371-545.

[9]   Achudum, A. and Owoeye, D. (2010) Quantitative Assessment of Heavy Metals in Some Tea Marketed in Nigeria-Bioaccumulation of Heavy Meals in Tea. Health, 2, 1097-1100.
http://dx.doi.org/10.4236/health.2010.29162

[10]   Kottur, G., Venkatesan, S., Kumar, R. and Murugesan, S. (2010) Influence of Seasons on Biochemical Parameters of Green Shoots and Quality Parameters of Made Tea under South Indian Conditions. Journal of Bioscience Research, 1, 74-82.

[11]   Islam, S., Qamar-uz-Zaman, A.S., Ahmad, F., Hussain, S. and Hamid, F.S. (2012) Effect of Foliar Spray of Varying Nitrogen Levels on Mature Tea Yield under Different Agroecological Conditions. Journal of Agricultural Research, 50, 485-492.

[12]   Sharangi, A.B. (2009) Medicinal and Therapeutic Potentialities of Tea (Camellia sinensis L.)—A Review. Food Research International, 42, 529-535.
http://dx.doi.org/10.1016/j.foodres.2009.01.007

[13]   13Obatolu, C.R. (1999) Correction of Magnesium Deficiency in Tea Plants through Foliar Applications. Communications in Soil Science and Plant Analysis, 30, 1649-1655.
http://dx.doi.org/10.1080/00103629909370317

[14]   Cherotich, L., Kamunya, S., Alakonya, A., Msomba, S., Uwimana, M., Wanyoko, J., et al. (2013) Variation in Catechin Composition of Popularly Cultivated Tea Clones in East Africa (Kenya). American Journal of Plant Sciences, 4, 628-640.
http://dx.doi.org/10.4236/ajps.2013.43081

[15]   Ertur, Y., Ercisli, A., Sengul, M., Eser, Z., Haznedar, A. and Turan, M. (2010) Seasonal Variation of Total Phenolic, Antioxidant Activity and Minerals in Fresh Tea Shoots (Camellia sinensis Var. Sinensis). Pakistan Journal of Pharmaceutical Science, 23, 69.

[16]   Omwonyo, W., Owour, P., Ongeri, D., Kamau, D., Kwach, B., Munyao, P. and Otieno, M.O. (2013) Availability of Some Inorganic Micronutrients and Effects of Grading on Their Levels in East Africa Black Teas and Infusions. Asian Journal of Biological and Life Sciences, 2, 42-49.

[17]   Kamunya, S. and Wachira, F. (2006) Two New Clones (TRFK 371/3 and TRFK 430/90) Released for Commercial Use. Tea, 27, 4-16.

[18]   Jayaganesh, S. and Venkatesan, S. (2010) Impact of Magnesium Sulphate on Biochemical and Quality Constituents of Black Tea. American Journal of Food Technology, 5, 31-39.
http://dx.doi.org/10.3923/ajft.2010.31.39

[19]   Pourmorad, F., Husseinimehr, S. and Shahabimajd, N. (2006) Antioxidant, Phenol and Flavanoid Contents of Some Selected Iranian Medicinal Plants. African Journal of Biotechnology, 5, 1142-1145.

[20]   Street, R., Száková, J., Drábek, O. and Mládková, L. (2006) The Status of Micronutrients (Cu, Fe, Mn, Zn) in Tea and Tea Infusions in Selected Samples Imported to the Czech Republic. Czech Journal of Food Science, 24, 62-71.

[21]   Yemane, M., Chandravanshi, B. and Wondimu, T. (2008) Levels of Essential and Non-Essential Metals in Leaves of the Tea Plant (Camellia sinensis L.) and Soil of Wushwush Farms, Ethiopia. Food Chemistry, 107, 1236-1243.

 
 
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