The behavior of seedlings of six sorghum cultivars planted at 2.5, 5.0, 7.5, and 10.0 centimeters was studied in growth chambers at air temperatures of 28, 32, 36, and 40 centigrades (daytime).
A day length of 12 hours and a nighttime air temperature 8 centigrades lower than daytime were used throughout.
The cultivars, three hybrids and three varieties, were grown in sand culture. Field moisture capacity was maintained during the period of observation.
After 14 days of growth, data were collected on the emergence percentages, above ground growth, above ground oven dry weights, below ground growth, and below ground oven dry weights.
Under the conditions of this investigation, depth of planting was more highly related to the emergence and development of the seedlings than any other factor. The most favorable depth of planting was 2.5 centimeters.
In general , hybrids were superior to standard open pollinated lines.
The above ground oven dry weights of the seedlings increased in direct proportion to air temperature; the below ground oven dry weights decreased with increased temperatures.
Top firing of the leaves was observed at 40 centimeters for all cultivars tested.
| Identifer | oai:union.ndltd.org:UTAHS/oai:digitalcommons.usu.edu:etd-3922 |
| Date | 01 May 1969 |
| Creators | Orihuela, Jhander |
| Publisher | DigitalCommons@USU |
| Source Sets | Utah State University |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | All Graduate Theses and Dissertations |
| Rights | Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact Andrew Wesolek (andrew.wesolek@usu.edu). |
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