Agricultural and Biosystems Engineering Publications

Document Type

Article

Publication Version

Published Version

Publication Date

1992

Journal or Book Title

Transactions of the ASAE

Volume

35

Issue

1

First Page

97

Last Page

104

Research Focus Area(s)

Land and Water Resources Engineering

DOI

10.13031/2013.28575

Abstract

The effect of water-table management practices on leaf photosynthesis and corn yield was investigated under two different field conditions in 1989 and 1990. In one field, water-table depths were maintained at 0.3, 0.6, and 0.9 m in field lysimeters during the growing season. In the other field, average water-table depths of 0.2, 0.3, 0.6, 0.9, and 1.1 m were maintained through subirrigation. Photo-synthesis measurements were made regularly during the growing season, and yield data were collected at harvest. In 1989, a relatively dry year, photosynthesis rates were higher at shallow water-table depths than at deep water-table depths. In 1990, a very wet year, photosynthesis rates were not significantly different for water-table depths between 0.3 and 0.9 m, but rates decreased significantly for water-table depths shallower than 0.3 m. Statistical analysis indicates that water-table effects on photosynthesis rates were not consistent. However, effects of various water-table depths on photosynthetic water-use efficiency (PWUE) were highly significant in both dry and wet seasons. Corn yields increased with increasing water-table depths. At water-table depths of 0.2 to 0.3 m, corn yield decreased significantly. In both dry and wet seasons, effects of water-table treatments on grain yield were highly significant and significant relationships were obtained between PWUE values and yield.

Comments

This article was published in Transactions of the ASAE. 35(1): 97-104. doi:10.13031/2013.28575. Posted with permission.

Copyright Owner

American Society of Agricultural and Biological Engineers

Language

en

File Format

application/pdf

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