AEJSA Volume 19, Number 2: May, 2025
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Efficiency of Trichoderma harzianum incorporation to organic and NPK fertilizers in improving growth and development of Barhi date palm offshoots
Karrar Taher Mahdi Al-Ameri, Ali K. Jabir and Ahmed H. Dakhil
ABSTRACT:The field experiment was conducted in 2023 and early 2024 to evaluate the efficiency of the biocontrol fungus Trichoderma harzianum, organic and mineral fertilizer NPK, individually or in combination, on the growth and development of Barhi palm seedlings in the orchard located within the Al-Shatea area, Najaf Governorate, central Iraq. The extent of the effect of fertilizer treatments on the rates of numbers and lengths of fronds was determined. The experiment was conducted with 8 treatments with three replicates for each treatment. The fertilizer treatments were in batches of 5 chemical soil fertilizers for 5 months (January, March, May, September and November) applied every month. Animal manure was added in one batch at a rate of 4 kg/seedling mixed with 200 grams of NPK fertilizer at a depth of 20-30 cm in the soil of palm seedlings in December. Then the fungal inoculum was added at a rate of 20 grams/seedling, applied twice in March and October. The results of the study showed that the treatments differed in their effect on the study indicators. The treatment of the organic and mineral fertilizer mixture NPK in the presence of T. harzianum gave the highest rates of the longest and shortest frond in January 2023, which achieved (223 cm and 140 cm), respectively, and the largest number of fronds with 26 fronds/shoot. The results of the study also showed that the shoots in the control treatment gave the lowest rates of the longest and shortest frond in January 2023, which reached (142 cm and 98 cm), respectively, and the rates of the number of fronds reached 20 fronds/shoot.
[ FULL TEXT PDF 1-6 ] DOI:10.22587/aejsa.2025.19.2.1
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