Response of growth, yield and forage quality and and indices of effectiveness and competitiveness to mycorrhizal inoculation in mixed intercropping of sunflower and guar

Document Type : Research Paper

Authors

1 Former MSc Student, Agricultural and Natural Resources University of Khuzestan

2 Associate Professor, Agricultural and Natural Resources University of Khuzestan

3 Professor, Agricultural and Natural Resources University of Khuzestan

4 Assistant Professor, Agricultural and Natural Resources University of Khuzestan

10.22084/ppt.2024.28708.2119

Abstract

In order to investigate the effect of different patterns of mixed cropping and mycorrhizal inoculation on yield and beneficial indices of sunflower (Helianthus annus L.) and guar (Cyamopsis tetragonoloba L.), an experiment was conducted in the spring of 2017 in the farm of Khuzestan University of Agricultural Sciences and Natural Resources. The factorial design was implemented in the form of randomized complete blocks with four repetitions. The experimental factors include two levels of mycorrhiza (inoculation and non-inoculation) and five planting ratios (100% sunflower), (100% guar), (75% sunflower + 25% guar), (25% sunflower + 75% guar) and (50 % sunflower + 50% guar) were investigated. The final harvest of sunflower plants was done during the milky-pasty ripening stage of the seeds, and the final harvest of guar plants was also done two weeks later according to the ripening of the seeds. The results showed a significant effect of mixed crop ratios and a significant difference between inoculation and non-inoculation of mycorrhiza on investigated traits including forage yield, as well as quality traits including nitrogen percentage and forage fiber percentage. Sunflower, the highest ratio of land equality (1.34) belonged to the treatment of 50% sunflower + 50% guar. The combination of 75% sunflower + 25% guar has the lowest competition index for sunflower, and the ratio of 75% guar + 25% sunflower has the lowest competition index for guar. The highest percentage of fodder nitrogen (2.34%) was obtained from the treatment of 25% sunflower + 75% guar and no mycorrhiza inoculation. The highest percentage of fodder ash was obtained from the treatment of no mycorrhizal inoculation (09/19). The highest percentage of sunflower raw fiber from the treatment without mycorrhizal inoculation was obtained from the ratio of 50% sunflower + 50% guar with an average of 0.45. The highest percentage of insoluble fibers in neutral detergent was 0.55% from the treatment of 50% guar + 50% sunflower with the level of mycorrhiza inoculation. The highest percentage of insoluble fibers in acidic detergent was obtained with no mycorrhiza inoculation (0.2). The highest and lowest yield of dry fodder was obtained from 75% sunflower + 25% guar treatment (2699.1 kg/ha) and 100% guar treatment (827.2 kg/ha), respectively. In general, it seems that the mixed cultivation of sunflower and guar can increase the quantity and quality of fodder production, and if the results are repeated in the next experiments, the ratio of 75% of sunflower and 25% of guar can be used in this field.

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Articles in Press, Accepted Manuscript
Available Online from 02 July 2024

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