Effect of planting date and spraying of humic acid in the growth traits and active compounds of Fenugreek (Trigonella foenum - Graecum L)

Abstract

The study was conducted at the Crops Research Station, College of Agriculture, University of Diyala during the years 2017-2018 to evaluate the effect of planting dates and spraying of humic acid in the growth characteristics and active compounds of Fenugreek (Trigonella foenum -graecum L). The experiment was carried out according to factorial arrangement in a complete randomized blocks design (RCBD) with three replicates and two factors, the first include planting dates (15/10,1/11,15/11) and the second is spraying of the humic acid at a concentration of 2 and 4 ml / L-1. Results revealed that the planting dates had a significant effect in the studied traits, the first date (15/10) recorded the highest rate of plant height (84.89 cm), seeds yield (7.805 g / plant-1 ), seeds yield / hectare (770.2 kg / h-1), number of branches (9.67 branches / Plant-1), number of leaves (146.6 leaves / plant-1), dry plant weight (20.11 g/plant-1), number of pods (47.33 pods / plant-1), number of seeds (14.44 seeds / pod-1), weight of 100 seeds (1.502 g) and the active compounds such as Choline (170.99 mg/ml-1), Trigonelline (305.73 mg/ml-1), Carpine (95.89 mg/ml-1) and Gentianine (191.11 mg/ml-1). The spraying of humic acid at a concentration of 4 ml / L was superior significantly in all traits such as plant height (74.67 cm), seeds yield (7.220 g / plant-1), seeds yield / hectare (710.0 kg / h-1), number of branches (8.11 branches / plant-1), number of leaves (61.00 leaves / plant-1), dry plant weight (20.44 g/plant-1), number of pods (38.22 pods / plant-1), number of seeds (14.00 seeds / pod-1), Choline (163.61 mg/ml-1), Trigonelline (283.86 mg/ml-1), Carpine (83.92 mg/ml-1) and Gentianine (183.03 mg/ml-1).