تأثير التسميد العضوي لمخلفات سعف النخيل والرش بالتربتوفان في بعض صفات النمو لشتلات الزيتون صنفي مانزانيللو وبعشيقي

The impact of organic fertilization in violations of palm frond and spring with tribtovan for some growth chracteristics for tow class of olive seedlings manzanelow and baashiqi

Abstract
The experiment was carried out in the plant canopy of the Department of Horticulture and Landscape Engineering/College of Agriculture – University of Karbala for the period from (10/11/2023) to (1/7/2024). with the aim of knowing the response of two types of olive seedlings to adding palm frond waste and spraying with tryptophan acid in some characteristics Phenotypic and chemical growth of olive seedlings (one year old). The first factor was two olive varieties (Manzanillo and Bashiqi). The second factor included palm frond waste at three levels (0, 3%, and 6%). The third factor included spraying treatments with tryptophan acid at three concentrations (0, 75, and 150 ml L-1 ). The study was carried out in a factorial experiment with three factors (2×3×3) with a design Randomized Completely Block Design (R.C.B.D) with three replicates, with each replicate including (18) treatments. Thus, the number of experimental units in the study was (54) experimental units, with (5) seedlings for each experimental unit. The data analysis process was conducted. Statistically for all studied traits according to the experimental design using the electronic calculator and the (Genstat 2007) program for statistical analysis, the averages were compared using the least significant difference (L.S.D) at the probability level (0.05).

The results of the study can be summarized as follows:

• The Manzanillo variety was significantly superior to the Bashiqi variety in all chemical and root vegetative traits. The increase in seedling height reached (25.385 cm), the increase in seedling diameter (2.083 ml), the increase in the number of leaves (537.60 leaves per seedling-1), the root length (43.726 cm), and the content of Total chlorophyll (3.250 ml g-1), percentage of carbohydrates (4.734%), nitrogen (2.692%), percentage of protein (16.131%), and auxin concentration in leaves (30.843 micrograms g-1 fresh weight).
• The treatment of adding palm frond waste at a level of (6%) showed significant superiority for all experimental characteristics and recorded the highest average increase in seedling height (28.811 cm), increase in seedling diameter (2.442 ml), number of leaves (611.50 seedling leaves -1), and root length reached ( 54.622 cm) and the total chlorophyll content (3.810 ml g-1), the percentage of carbohydrates (6.621%), nitrogen (3.254%), the percentage of protein (20.342%) and auxins (30.843 micrograms g-1, fresh weight).
• The spraying treatment with tryptophan acid (150 ml L-1) showed significant superiority for all chemical, vegetative and root traits and recorded the highest average increase in seedling height (24.689 cm), increase in seedling diameter (1.781 ml ) and number of leaves (529.50 seedling leaves -1). The total leaf area (17,759 cm2), root length (45,800 cm), root diameter (4,317 cm), and content Total chlorophyll (3.310 ml g-1), percentage of carbohydrates (4.991%), nitrogen (2.648%), percentage of protein (16.554%), and average concentration of auxins in the leaves (30.520 micrograms g-1 fresh weight).
• The double-triple interaction treatments achieved a significant effect on most of the experimental characteristics, especially the triple-interaction treatment ( manzanillo variety and organic fertilizer for palm frond waste at a level of (6%) and (150 ml L-1) tryptophan.