Effects of Foliar Fertilizer Application on Quality of Tea (&amp;lt;I&amp;gt;Camellia sinensis&amp;lt;/I&amp;gt;) Grown in the Kenyan Highlands

Njogu, Rachael Njeri E.; Kariuki, David K.; Kamau, D. M.; Wachira, Francis N.

doi:10.4236/ajps.2014.518286

Cited by 10 publications

(9 citation statements)

References 15 publications

(11 reference statements)

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“…Levels of total polyphenols, tannins, and total flavonoids tended to increase with increasing levels of some macronutrients. In studies of C. sinensis, tea quality tended to improve with fertilization with microelements (Manenji et al, 2015;Njogu et al, 2014). Venkatesan et al (2005) also reported a high and significant positive correlation between polyphenol content and Zn levels of mature leaves of tea.…”

Section: Discussionmentioning

confidence: 99%

Effects of Foliar Spray Application of Selected Micronutrients on the Quality of Bush Tea

Khathutshelo¹,

Nkomo²,

Ngezimana³

et al. 2016

horts

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Bush tea (Athrixia phylicoides DC.) is a herbal beverage and medicinal plant indigenous to South Africa. The aim of the study was to provide the baseline for foliar spray application of micronutrients to enhance the quality of bush tea. A trial was conducted to determine the effect of micronutrients on the quality of bush tea. Four separate trials for boron (B), iron (Fe), zinc (Zn), and copper (Cu) were laid out in a completely randomized block design. Treatments consisted of an unsprayed control and single foliar sprays of B, Fe, Zn, and Cu, with 10 replicates. The levels of each element were unsprayed control, 50 mL·L−1, 100 mL·L−1, and 150 mL·L−1. Parameters recorded were leaf tissue B, Fe, Zn, and Cu, and total polyphenol, total antioxidant, total flavonoids, and total tannin contents. Results from this study demonstrated that foliar application of B did not induce significant response in terms of total polyphenol content after B application. There was a quadratic response for total flavonoids (167 mg·g−1), with most of the total flavonoids reaching maximum at 100 mL·L−1. Foliar application of Fe exhibited a quadratic response, with most of the total polyphenols (45.1 mg·g−1) reaching maximum at 100 mL·L−1. All treatments showed a linear response for total antioxidant, total flavonoids, and total tannin contents. Treatments elicited a quadratic response for total polyphenols (70.6 mg·g−1), total antioxidants (78.3 mg·g−1), total flavonoids (148.9 mg·g−1), and total tannin contents (78.3 mg·g−1) after foliar Zn application, reaching maximum at 100 mL·L−1. Foliar application of essential elements in bush tea led to a significant increase in the Zn, Fe, Cu, and B content; application at 100 mL·L−1 is recommended for improved chemical composition of bush tea. A further trial with treatment combinations is required to determine chemical responses of bush tea.

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Section: Discussionmentioning

confidence: 99%

Effects of Foliar Spray Application of Selected Micronutrients on the Quality of Bush Tea

Khathutshelo¹,

Nkomo²,

Ngezimana³

et al. 2016

horts

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“…From on-site weather stations, the relative humidity was particularly low, which could have led to 'banjhi' buds, thereby explaining the low yields. Results from a parallel investigation showed significant correlation of yield with nutrient levels (NPK) applied (Njogu et al, 2014a), and also significant increases in levels of total polyphenols for foliar fertilizer applied plots more than SF, and this was notwithstanding the considerable lower amounts of foliar fertilizers applied as compared to the control SF by a factor of 1:5:107 (FF1:FF2: SF) per hectare (Njogu et al, 2014b).…”

Section: Economic Analysismentioning

confidence: 98%

Economic Evaluation of Foliar NPK Fertilizer on Tea Yields in Kenya

Njogu¹,

Kariuki²,

Kamau³

et al. 2015

JPS

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Economic evaluation analysis of foliar (NPK) fertilizer on tea yields was investigated on three varieties of tea grown in the Kenyan Highlands. Foliar fertilizers trial was setup on three sites, Meru, Kirinyaga and Kericho, comprising of 36 plots per site. Two foliar fertilizer types, Foliar Fertilizer 1 (FF1) and Foliar Fertilizer 2 (FF2), a positive control of Soil Fertilizer (SF) and a blank (FF0) were used to standardize the method. Yield analysis in Meru site showed significant increase (HSD=4.9, p≤0.05) after FF1 full rate application. SF had significant yield increases for all its rates from zero rate (HSD= 49, 44, 19, p≤0.05) for half, full and double rates respectively. FF2 had no yield increase after its application. The economic rates were determined to be full rate for FF1 and SF and half rate for FF2 in Kericho site; half rate for all fertilizer types Kirinyaga site; double rate for FF2 and SF and full rate for FF1 in Meru site. The profitable rates were: double rate for SF across all sites and for FF1 and FF2 in Meru site; full rate for FF1 and half rate for FF2 in Kericho and Kirinyaga sites respectively.

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“…Menurut Njogu et al (2014), penyerapan nutrisi hara melalui daun dapat meningkatkan proses fotosintesis dan dapat degan cepat diubah menjadi unsur-unsur hara yang dibutuhkan tanaman, berbeda dengan pemupukan melalui tanah tidak dapat langsung diserap karena kehilangan melalui pelindian, penguapan, denitrifikasi.…”

Section: Pengamatan Populasiunclassified

Pengaruh Pemberian Pupuk Mikro Zn dan Cu serta Pupuk Tanah terhadap Perkembangan Empoasca sp. pada Areal Tanaman Teh

2018

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The effect of Zn and Cu micro-fertilizer and soil fertilizer on the development of Empoasca sp. in tea plantation areaFertilization has an important role for the entire process of metabolism and improves plant health. Tea plants are plants that require macro and micro nutrient inputs. The micro elements of Zn and Cu are needed for energy production, protein synthesis, formation of auxin hormones and increament of plant resistance to pest attack. This study aimed to determine the effect of Zn and Cu micro fertilizer and soil fertilizer on the development of Empoasca sp. The study was conducted from January to July 2017 at Gambung Experimental Station with an altitude of 1350 asl. The experiment was designed with Randomized Block Design (RBD) Factorial pattern with the following treatment arrangement: Factor A = 1) Without Micro Fertilizer, 2) Micro Fertilizer of Zn and Cu 200 g/ha/application, and 3) Zn and Cu 300 g/ha/application; Factor B = 1) Soil fertilizer of 100% recommended dosage, 2) Soil fertilizer of 75% recommended dosage, and 3) Soil fertilizer of 50% recommended dosage. All treatmnets were repeated three times. Application of micro fertilizers was carried out after six times of tea-leaf picking, while soil fertilizer was applied once at the beginning of the experiment. Observation parameters were population and attack intensity of Empoasca sp., as well as shoot production (kg/25 m2 plot size). The results showed that the application of fertilizers had an effect on the decrease of attack intensity and the population of Empoasca sp. in all treatments. Average attack intensity and population of Empoasca sp. at the end of the observation did not differ significantly of 31.64% and 2.55 Empoasca sp. per plant. Meanwhile, the highest total production of 36.56 kg/plot was obtained from the application of micro fertilizer Zn and Cu in the dosage of 200 g/ha/application at all doses of soil fertilizer, but there was no interaction between treatment factors.Keywords: Micro fertilizer, Soil fertilizer, Empoasca sp., Tea plantABSTRAKPemupukan memegang peranan penting untuk seluruh proses metabolisme dan meningkatkan kesehatan tanaman. Tanaman teh merupakan tanaman yang memerlukan input unsur hara makro dan mikro. Unsur mikro Zn dan Cu diperlukan tanaman untuk produksi energi, sintesis protein, pembentukan hormon auksin serta meningkatkan resistensi terhadap serangan organisme pangganggu tanaman. Penelitian ini bertujuan untuk mengetahui dampak pemberian pupuk mikro Zn dan Cu serta pupuk tanah terhadap perkembangan Empoasca sp. Penelitian dilaksanakan dari bulan Januari hingga Juli 2017 di Kebun Percobaan Gambung dengan ketinggian 1.350 mdpl. Percobaan dirancang dengan Rancangan Acak Kelompok (RAK) pola Faktorial dengan susunan perlakuan sebagai berikut: Faktor A = 1) Tanpa Pupuk mikro, 2) Pupuk mikro Zn dan Cu 200 g/ha/aplikasi, dan 3) Pupuk mikro Zn dan Cu 300 g/ha/aplikasi; Faktor B = 1) Pupuk tanah 100% dosis anjuran, 2) Pupuk tanah 75% dosis anjuran, dan 3) Pupuk tanah 50% dosis anjuran. Perlakuan diulang sebanyak tiga kali ulangan. Aplikasi pupuk mikro dilaksanakan setelah pemetikan sebanyak enam kali, sedangkan pemberian pupuk tanah dilakukan satu kali diawal percobaan. Parameter pengamatan yaitu populasi, intensitas serangan Empoasca sp., dan produksi pucuk (kg/plot 25 m2). Hasil penelitian menunjukkan bahwa pemberian pupuk berpengaruh terhadap penurunan intensitas serangan dan populasi Empoasca sp. pada seluruh perlakuan. Rata-rata intensitas serangan dan populasi Empoasca sp. pada akhir pengamatan tidak berbeda nyata sebesar 31,64% dan 2,55 ekor per tanaman. Sementara itu, total produksi tertinggi diperoleh dari aplikasi pupuk mikro Zn dan Cu dosis 200 g/ha/aplikasi pada semua dosis pupuk tanah yaitu sebesar 36,56 kg/plot, namun tidak terjadi interaksi antar faktor perlakuan.Kata Kunci: Pupuk mikro, Pupuk tanah, Empoasca sp., Tanaman teh

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Effects of Foliar Fertilizer Application on Quality of Tea (<I>Camellia sinensis</I>) Grown in the Kenyan Highlands

Cited by 10 publications

References 15 publications

Effects of Foliar Spray Application of Selected Micronutrients on the Quality of Bush Tea

Effects of Foliar Spray Application of Selected Micronutrients on the Quality of Bush Tea

Economic Evaluation of Foliar NPK Fertilizer on Tea Yields in Kenya

Pengaruh Pemberian Pupuk Mikro Zn dan Cu serta Pupuk Tanah terhadap Perkembangan Empoasca sp. pada Areal Tanaman Teh

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