𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Effects of potassium and magnesium nutrition on the quality components of different types of tea

✍ Scribed by Ruan, Jianyun; Wu, Xun; H�rdter, Rolf

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
109 KB
Volume
79
Category
Article
ISSN
0022-5142

No coin nor oath required. For personal study only.

✦ Synopsis

In üeld experiments, the eþ ects of potassium and magnesium nutrition on the quality components of diþ erent types of tea, including black tea, oolong tea and green tea, were studied. The results show that K and Mg fertilizer application increased the contents of free amino acids and caffeine of the various tea types with the maximum increase found in the treatment including both nutrients. The content of polyphenols in tea leaves was also increased by K application. The eþ ect of Mg on polyphenol content was inconsistent. In general, Mg apparently decreased the content of polyphenols and only in case the soils were depleted of plant available K and Mg, a slight increase could be observed. The contents of theaýavins and thearubigins, important quality components of brewed black tea, were also increased by K application. Flavour compounds in brewed oolong tea were considerably improved by K and Mg application.

📜 SIMILAR VOLUMES

Drought Effects on the Marketable and Nu
Drought Effects on the Marketable and Nutritional Quality of Carrots
✍ Sørensen, Jørn N; Jørgensen, Uffe; Kühn, Birka F 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 207 KB 👁 1 views

In two cultivars of carrots (Daucus carota L) drought stress was imposed at di †erent developmental stages in order to examine how the marketable and nutritional quality was inÑuenced. Experiments were conducted on both a sandy loam soil and a coarse sandy soil. Although drought stress during a 3-we

Longitudinal Effects of Different Types
Longitudinal Effects of Different Types of Practice on the Development of Chess Expertise
✍ Robert W. Howard 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 422 KB

## Summary A view holds that expertise level depends on practice alone and that certain types of practice are important or unimportant. Supporting evidence largely comes from studies using a correlational retrospective recall paradigm, usually with small samples. Initially, these studies were parti

The Potassium, Sodium, Magnesium, Calciu
The Potassium, Sodium, Magnesium, Calcium and Phosphate Nutrition of Sugarbeet (Beta vulgaris) Grown on Soils Containing Incorporated Straw
✍ Allison, Marc F; Chapman, Jenni L; Garat, Carlos E; Todd, Alan D 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 181 KB 👁 1 views

Between 1990 and , a series of three experiments compared the e †ects of incorporating or removing straw from a total of Ðve preceding cereal crops on the nutrient concentration, uptake and processing quality of sugarbeet. Incorporated straw increased K concentrations in tops and roots and increase

Effect of emulsifiers, fat level and typ
Effect of emulsifiers, fat level and type on the rheological characteristics of biscuit dough and quality of biscuits
✍ Manohar, R Sai; Rao, P Haridas 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 132 KB 👁 1 views

The effect of level and type of fat as well as emulsi®ers on the rheological characteristics of biscuit dough and quality of biscuits has been studied. Increasing the level of fat from 150 to 250 g kg À1 softened the dough, as indicated by a reduction in extrusion time from 108 to 18 s and an increa

The effects of ethanol treatment on the
The effects of ethanol treatment on the metabolism, shelf life and quality of stored tomatoes at different maturities and temperatures
✍ Yanuriati, Anny; Savage, Geoffrey P; Rowe, Richard N 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 113 KB 👁 2 views

Two maturity stages of commercially grown tomatoes (breaker and mature green) were exposed to ethanol vapour (2 ml ethanol kg À1 fruit) for 6 h at 20 °C prior to storage at 5 °C and 20 °C. During storage the colour, ®rmness and composition changes were examined every 3 and 7 days. The results showed