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Moisture Sorption in Commercial Hybrid Maize (Zea mays L.) Seeds during storage at Ambient Tropical

Authors: Oyekale Kehinde

Publication Type: Journal article

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Abstract

Seed moisture sorption isotherms were determined for two tropical hybrid maize varieties stored at simulated tropical conditions using the static method. Sealed containers with saturated salt solutions were used to generate 8 relative humidity conditions inside an incubator set at 31Â±40C for 12 months. Changes in seed moisture content were evaluated at intervals. Seed moisture sorption isotherms were constructed for the two varieties and fitted to five different sorption models (Henderson, Henderson-Thompson, Chung-Pfost, modified Halsey and GAB). Seed moisture sorption isotherms for the two seed lots were the expected sigmoidal curves. The point of inflexion of the curve was at 55% relative humidity, indicating when seed drying was initiated and maximum relative humidity for drying and/or dry-storage at the ambient temperature. The sorption isotherms for the two seed lots however differed in magnitude, thus equilibrium seed moisture at this point about 8% for suwan-1-SRY and 5% for Oba super 1. Fits of the sorption isotherms to mathematical models differed also among seed genotypes. The Henderson-Thompson and Chung-Pfost models exhibited best fits (%D = 13.413 and 6. 038) to the moisture sorption data of Oba super 1 and suwan-1-SRY seed lots respectively. The results suggested the need to determine sorption isotherms for tropical hybrid maize genotypes in relationship with seed morphology. Meanwhile, generalized prediction of seed moisture during drying or dry-storage of these varieties in tropical seed stores can be done using the Henderson-Thompson and Chung-Pfost models.

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Oyekale,K. . (0000). Moisture Sorption in Commercial Hybrid Maize (Zea mays L.) Seeds during storage at Ambient Tropical , 0 (), 0-0.

Oyekale,K. . "Moisture Sorption in Commercial Hybrid Maize (Zea mays L.) Seeds during storage at Ambient Tropical " 0, no (), (0000): 0-0.

Oyekale,K. and . (0000). Moisture Sorption in Commercial Hybrid Maize (Zea mays L.) Seeds during storage at Ambient Tropical , 0 (), pp0-0.

OyekaleK, . Moisture Sorption in Commercial Hybrid Maize (Zea mays L.) Seeds during storage at Ambient Tropical . 0000, 0 ():0-0.

Oyekale,Kehinde , . "Moisture Sorption in Commercial Hybrid Maize (Zea mays L.) Seeds during storage at Ambient Tropical ", 0 . (0000) : 0-0.

O.Kehinde , "Moisture Sorption in Commercial Hybrid Maize (Zea mays L.) Seeds during storage at Ambient Tropical " vol.0, no., pp. 0-0, 0000.

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