This study was carried out in one of the private palm orchards located in the area of the village of Albu Assaf - Al-Dawwar, which is 10 km west of Ramadi city / Anbar Governoaverge, during the 2020-2021 season to study the effect of three levels of fertilizer combinations F0:0 ,F1: 600 g of urea (N 276) + 350 g of triple superphosphate (P2O5 500 ) + 168 g of potassium sulfate (K2O 240), 1200 g urea (552 N) + 700 g triple superphosphate (P2O5 336) + 1000 g potassium sulfate (K2O 480) and three levels of humic acid H0:0, H1:15, H2:30 ml. L-1 and two levels of a combination of biofertilizers, Trichoderma(Trichoderma harzianum) and Mycorrhizal(Glomus mosseae) B0:0, B1:300 ml Trichoderma + 400 g Mycorrhizal, with three replications for each treatment, to increase and improve the production of date palm trees, Khastawi cultiver, The research was carried out as a factorial experiment (2 x 3 x 3) it used the design of randomized complete block, RCBD, where 54 trees of 11 years of age were selected that were homogeneous in terms of growth characteristics as much as possible, Each palm was considered a repeater. The results showed the superiority of the level F2 chemical fertilization in several characteristics, including the percentage of the set fruit, the lowest percentage of fallen, the length and weight of the fruit and its size and total yield, which amounted to 52.431 kg, whereas, the control treatment gave the lowest average for the traits as mentioned earlier. The H2 level of humic acid was superior in the characteristics of the percentage of set fruit, the lowest percentage of fallen, length and weight of the fruit, its size and total yield, which amounted to 58.148. In contrast, the control treatment gave the lowest average for the abovementioned traits. The results also showed the superiority of level B1 of the combination of biofertilizers in the percentage of frozen fruit, falling, fruit length and total yield, which amounted to 51.641 kg. In contrast, the control treatment gave the lowest rate for the abovementioned traits. The binary overlap F2H2 treatment gave the highest rates in the set fruit percentage, length and weight of the fruit, its size and the total yield, which amounted to 59,064 kg, and the lowest percentage of fallen. Also, the bilateral overlap H2B1 treatment gave the highest rates in the set fruit percentage and fruit length and the lowest percentage of fall. The same treatment with the B0 treatment appeared to outperform in the weight and size of the fruit and the total yield, which amounted to 58.915 kg compared to the control treatment that gave a lower average., the bilateral overlap F2B1 treatment gave the highest rates in the characteristics of fruit length and weight, as well as the triple overlap F2H2B1 treatment, gave the highest averages in the characteristics of the set fruit percentage and the lowest percentage of fallen and weight of the fruit and the total yield, which amounted to 59.648 kg compared to the control treatment that gave a lower average for the mentioned traits where the response was significant for the type is Khastawi in terms of increasing the yield and its components. Keywords: Date palm; chemical fertilization; NPK; bioFertilization; Humic acid; Khastawi.
The study was conducted in one of the own palm orchards located in the area of the village of Albu Assaf - Al-Dawwar, which is 10 km west of Ramadi city / Anbar Governorate, during the 2020-2021 season to know the effect of three levels of fertilizer combinations F0:0, F1: 600 g of urea (N 276) + 350 g of triple superphosphate (P2O5 168 ) + 500 g of potassium sulfate (K2O 240), 1200 g urea (552 N) + 700 g triple superphosphate (P2O5 336) + 1000 g potassium sulfate (K2O 480) and three levels of humic acid H0:0, H1:15, H2:30 ml. L-1 and two levels of a combination of biofertilizers, Trichoderma(Trichoderma harzianum) and Mycorrhizal(Glomus mosseae) B0:0, B1:300 ml Trichoderma + 400 g Mycorrhizal, with three replications for each treatment, To find out the effect of three levels of fertilizer combinations, three levels of humic acid and two levels of bio-fertilizer combination on the vegetative growth characteristics of date palm trees of the Khastawi cultivar. The results indicated the superiority of the level of F2 chemical fertilization in vegetative traits, including the dry matter of leaves, leaflet length, leaflet width, leaf length and increase in the leaves number of gave47.6372 %, 0.7128cm, 0.2436cm, 22.1039cm, 8.5000 leaves, respectively. The H2 of humic acid achieved the best values in the characteristics of the leaves dry matter percentage (%), the length and width of the leaflet, leaf length, and increased leaves number gave 48.1889 %, 0.6872cm, 0.2132cm, 21.8745cm, 8.5556 leaves, respectively, results also indicated the superiority of level B1 of the biofertilizer mixture in the characteristics of leaf dry matter percentage, leaflet width, leaf length and increase in leaf number, 45.5852%, 0.2122cm, 21.6867cm, 8.4444 leaves, respectively. The triple interaction F2H2B1 treatment achieved high averages in the characteristics of the dry matter percentage of leaves, leaflet length, leaf length and the increase in the number of leaves, 50.6900 %, 0.7400cm, 24.0662cm, 9.3333 leaves.
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