Abstract:
The husk leaf characteristics of maize affects the ear moisture. In order to explore the husk leaf characteristics and its relationship with cob-pedicel and cob moisture of spring maize in eastern Jilin Province, we analyzed the number, thickness, dry weight, moisture and dehydration rate of husk leaves in six maize varieties (Longken 5, Beizhongyu 1, Fengken 008, Xianda 203, Heyu 25 and Longken 9) and their relationships with the moisture of cob-pedicel, ear and grain at harvest. The results showed that the dry weight, the number and the thickness of husk leaves per cob were different among varieties. The moisture of husk leaves, cob-pedicel and cob was not consistent. The husk leaves moisture decreased with maize growing period. Compared with husk leaves, the moisture of cob-pedicel remained above 79% until 50 days after silking (DAS), and decreased dramatically during DAS 51 − 57. The cob moisture declined from silking to late growth period. Correlation analysis indicated that there were significant linear positive correlations between the dry weight of husk leaves and cob-pedicel, the moisture of cob-pedicel and cob, the moisture of husk leaves and cob, the moisture of husk leaves and cob-pedicel, and the moisture of grain at harvest and the dehydration rate of husk leaves in DAS 51 − 57. There were significant negative linear correlations between the dry weight of cob and husk leaves, the number of husk leaves and the dehydration rate of cob-pedicel in DAS 30 − 43, and the thickness of husk leaves at base of cob and the dehydration rate of cob-pedicel in DAS 30 − 43. The dry weight of cob-pedicel and cob have no significantly correlated.