Relationship between chlorophyll meter readings and leaf nitrogen concentration in papaya (Carica papaya L.)

Issue Date

4-2016

Abstract

Papaya or pawpaw is native to Central and South America distributed throughout the tropical areas of the world, but poorly studied for plant physiology. the portable chlorophyll meter has been used to predict nitrogen (N) requirements to improve N fertilizer management in some fruit crops such as custard apple and passion fruit. Thus, an experiment was carried out to evaluate the relationship between the readings provided by the chlorophyll index and the leaf nitrogen (N) concentration in papaya (pawpaw) applied with different N rates (0, 320, 400 and 560 g N per plant. Positive and highly significant correlations were found between the leaf chlorophyll readings and N content of pawpaw. The satisfactory validation of the linear relationship indicates the potential use of chlorophyll meter to estimate leaf N status of papaya, showing that plants which contained from 36.00 to 36.56 (leaf chlorophyll a), 11.6-11,96 (leaf chlorophyll b) and 47.65-48.62 (total leaf chlorophyll) are supplied with N adequately.

Source or Periodical Title

Philippine Journal of Crop Science

ISSN

0115-463x

Volume

41

Issue

1

Page

75-79

Document Type

Article

Frequency

tri-quarterly

Physical Description

tables, graphs

Language

English

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