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Light intensity and nitrogen level as they affect sex expression, growth and yield of two cucumber (Cucumis sativus L.) varieties / bu Wiroj Saengbangka

By:

Saengbangka, Wiroj [author]

Contributor(s):

Irabagon, Josue A [adviser]

Material type: Text

TextLanguage: English Publication details: Muñoz, Nueva Ecija, 1984. Cavite State University- Main Campus,Description: 101 pages : illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

635.63 Sa1 1984

Online resources:

Click here to view thesis abstract and table of contents

Abstract: SAENGBANGKA, WIROJ, Central Luzon State University, Institute of Graduate Studies, January 1984. Light Intensity and Nitrogen Level as They Affect Sex Expression, Growth and Yield of Two Cucumber (Cucumis sativus L.) Varieties. Major Adviser: Prof. Josue A. Irabagon, Ph.D. The experiment was conducted to determine the influence of light intensity and nitrogen level on sex ratio, growth and yield of two cucumber varieties. Plants grown under shaded condition had significantly greater number of days from seed emergence to the last harvest, greater number of branches and with late flowering, but with smaller stem diameter and narrower sex ratio. Shading also significantly increased the percentage of fruit setting and yield when compared to those plants grown under unshaded condition. Incremental nitrogen significantly influenced the number of days from the seed emergence to the last harvest and diameter of stems. Insignificant effects were noted on number of branches, days to first flower emergence, sex ratio, fruit setting and yield. The greatest number of days from seed emergence to the last harvest was obtained at 300 kg N/ha, beyond this amount, a marked decrease was noted, The diameter of stem increased as the levels of nitrogen were increased, following a linear trend even as high as 500 kg N/ha. A highly significant interaction was noted between light intensity and nitrogen level, particularly on stem diameter and number of branches. Results indicate that when plants were grown under the shade with no nitrogen fertilization, the plant tends to produce stems with smaller diameter, but with greater number of branches, than plants applied with varying levels of nitrogen under unshaded condition. Correlation tests show that fruit yield is associated with the number of days from seed emergence to last harvest, stem diameter, number of branches, days to first male flower emergence, sex ratio, and percent fruit setting.

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Holdings ( 1 )
Title notes ( 4 )

Holdings
Item type	Current library	Collection	Call number	Materials specified	URL	Status	Notes	Date due	Barcode
Theses / Manuscripts	Ladislao N. Diwa Memorial Library Theses Section	Non-fiction	635.63 Sa1 1984 (Browse shelf(Opens below))		Link to resource	Room use only	T-1333		00005006

Thesis (M.S.--Crop Science) Central Luzon State University

Includes bibliographical references.

SAENGBANGKA, WIROJ, Central Luzon State University, Institute of Graduate Studies, January 1984. Light Intensity and Nitrogen Level as They Affect Sex Expression, Growth and Yield of Two Cucumber (Cucumis sativus L.) Varieties. Major Adviser: Prof. Josue A. Irabagon, Ph.D.

The experiment was conducted to determine the influence of light intensity and nitrogen level on sex ratio, growth and yield of two cucumber varieties. Plants grown under shaded condition had significantly greater number of days from seed emergence to the last harvest, greater number of branches and with late flowering, but with smaller stem diameter and narrower sex ratio. Shading also significantly increased the percentage of fruit setting and yield when compared to those plants grown under unshaded condition.

Incremental nitrogen significantly influenced the number of days from the seed emergence to the last harvest and diameter of stems. Insignificant effects were noted on number of branches, days to first flower emergence, sex ratio, fruit setting and yield. The greatest number of days from seed emergence to the last harvest was obtained at 300 kg N/ha, beyond this amount, a marked decrease was noted, The diameter of stem increased as the levels of nitrogen were increased, following a linear trend even as high as 500 kg N/ha.

A highly significant interaction was noted between light intensity and nitrogen level, particularly on stem diameter and number of branches. Results indicate that when plants were grown under the shade with no nitrogen fertilization, the plant tends to produce stems with smaller diameter, but with greater number of branches, than plants applied with varying levels of nitrogen under unshaded condition.

Correlation tests show that fruit yield is associated with the number of days from seed emergence to last harvest, stem diameter, number of branches, days to first male flower emergence, sex ratio, and percent fruit setting.

Submitted to the University Library 05/04/2007 T-1333