Stratiform analysis of growth, total nitrogen, free amino acid and neutral detergent fiber concentration of new shoots in mechanically-plucked tea (Camellia sinensis L.) bush

Some factors which might relate to yield and quality were investigated by stratiform analysis in order to estimate the most suitable plucking height in the mechanically-plucked tea bush. During a period of new shoot growth of the first crop in 1992, new shoots ware harvested at 1 cm intervals from t...

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Bibliographic Details
Published inJapanese Journal of Crop Science Vol. 65; no. 4; pp. 612 - 617
Main Authors Nakano, T. (Shizuoka-ken. Tea Experiment Station, Kikugawa (Japan)), Morita, A, Tani, H, Suzuki, N
Format Journal Article
LanguageJapanese
English
Published CROP SCIENCE SOCIETY OF JAPAN 1996
Subjects
ACIDE AMINE
AMINO ACIDS
AMINOACIDOS
ANALYTICAL METHODS
AZOTE
BOURGEON
BUDS
CAMELLIA SINENSIS
CRECIMIENTO
CROISSANCE
FIBRAS
FIBRE
FIBRES
Free amino acid
GROWTH
MECHANICAL METHODS
METHODE MECANIQUE
METODOS MECANICOS
Neutral detergent fiber
NITROGEN
NITROGENO
PODA
PRUNING
Rail-tracking tea plucker
Stratified clip method
TAILLE
Tea
TECHNIQUE ANALYTIQUE
TECNICAS ANALITICAS
Total nitrogen
YEMA (PLANTA)
Yiled
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Summary:Some factors which might relate to yield and quality were investigated by stratiform analysis in order to estimate the most suitable plucking height in the mechanically-plucked tea bush. During a period of new shoot growth of the first crop in 1992, new shoots ware harvested at 1 cm intervals from the top to the bottom of each tea bush. Weights of leaves and stems were heavier at the lower layers than the upper layers. The total nitrogen concentration was higher at the upper layers. The free amino acid concentration was higher at the middle layers in the early harvest, and was higher at the upper layers in the late harvest. the neutral detergent fiber concentration was higher at the lower layers. These results show that at the upper plucking height, yield decreases but quality is enhanced. On the basis of these results, an attempt was made to modify the qualitative deterioration caused by the delay in harvesting time. In the plucking at the last skiffing height, the harvest on May 8th showed higher neutral detergent fiber concentration and less total nitrogen and free amino acid concentration than he harvest on May 4th. However, when plucked 2-4 cm higher on May 8th, the harvest showed the same level of chemical concentrations as the plucking at the last skiffing height on May 4th
Bibliography:F60
1997004350
F62
ISSN:0011-1848
1349-0990
DOI:10.1626/jcs.65.612