الفهرس 
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Abstract
Schefflera plants considered to be among the best ornamental foliage plants used widely for the decoration and interiorscapers. They are remarkable for their formation and variegate or darkgreen leaflet. Schefflera plants when moved from the production greenhouse to interior environment, leaf DROP often occur which reduce their aesthetic appeal. Consequently, this work originally aimed to investigate the effect of some shading methods, fertilization and Naphthalene acetic acid (NAA) on acclimatization of two Schefflera sp.: 1?Schefflera arboricola Pov. (Heptaplureum arboricola). 2? ~ actinophylla Endl. (Brassaia actinophylla). This investigation was carried out during the two successive seasons of 1998 and 1999 at the Experimental Station, Faculty of Agriculture, Mansoura University. Treatments included 4 methods for acclimatization as follow: 1?Nonacclimatized plants (control plants): ?Plants were grown in the production greenhouse (3 months). After this period, plants were moved directly to the interior environment room until the end of the experiment (4 months). 2 Acclimatization method 1 ?Plants were transferred from the production greenhouse to lath greenhouse for 3 months, then plants were moved to interior environment room until the end of the experiment (4 months). 3 Acclimatization method 2: ?Plants were transferred from the production greenhouse to shading place (45 days), after this period, plants were moved to lath greenhouse (45 days), and then they were transferred to interior environment room until the end of the experiment (4 months). 4?Acclimatization method 3: Plants were transferred from the production greenhouse to the lath greenhouse (45 days) and then plants were moved to the shading place (45 days). After this period, plants were transferred to the interior environment room (4 months). During the acclimatization period each method included four treatments as follows: 1 Untreated plant (control). 2 Fertilization with 242 N81 P 161 K g/m2/year (NPK). 3 Spraying with NAA at 200 ppm. 4NPK + NAA. ? The most important results achieved are summarized as follows: First experiment (Schefflera arboricola): 1. Vegetative characters: 1.1. Number of leaves: 1.1.1. Number of new leaves formation: The highest number of new leaves formation during the interior environment period was obtained when Schefflera arboricola plants were acclimatized by method 2 and fertilized with (242N 81P 161 K kg/m2/y) during the acclimatization period. 1.1.2. Number of leaf abscission: The lowest number of leaf abscission during the interior environment period was obtained when Schefflera arboricola plants were acclimatized by method 2 and fertilized with (242N 81P 161 K kg/m2/y) during the acclimatization period. 1.1.3. Total number of leaves at the end of the experiment: a The interaction between acclimatization method 2 and fertilization with NPK gave the highest number of total leaves. b The lowest number of total leaves at the end of the interior period were obtained when Scefflera arboricola plants had acclimatized by method 1 and treated with NPK+NAA during the first season. During the second season, the least results were obtained when acclimatized Shefflera plants by method 3 and treated with NPK+NAA. 1.2. Plant height 1.2.1. The increase in plant height: a During the interior environment period, the nonacclimatized plants and fertilized with NPK gave the highest increasing in plant height. b The lowest increasing in plant height during the interior period were obtained when untreated plants were acclimatized by method 1 or method 2 during the first season. While, during the second season, the interaction between acclimatization method 2 and NAA+NPK gave the lowest increasing in plant height. 1.2.2. Final plant height: a At the end of experiment the tallest plants were recorded with nonacclimatized plants treated with NPK compared with all treatments during both seasons. b Untreated Shefflera arboricola plants were the tallest when acclimatized by method 3. c The lowest final plant height were recorded with untreated Shefflera arboricola plants which were acclimatized by method 2. 1.3. Trunk caliper: a Nonacclimatization plants which were untreated recorded the highest value in trunk caliper in the first season. b Acclimatization plants by method 2 recorded the best results in trunk caliper when treated with NPK,NAA or NPK+NAA in the first season. c In the second season, all treatments not significant. 1.4. Length of terminal three internodes and petiole length: a The highest increase in the length of terminal three internodes was recorded by nonacclimatized plants when treated with NPK. b The combination between fertilization with NPK or spraying with NAA and acclimatization methods 2 or 3 caused highly increasing in petiole length in both seasons. 1.5. Leaf area: a?THE INTERACTION BETWEEN ACCLIMATIZATION METHOD 2 AND FERTILIZATION WITH NPK RECORDED THE LARGEST LEAF AREA. B NONACCLIMATIZED PLANTS INDUCED THE GREATEST LEAF AREA WHEN FERTILIZED WITH NPK. C THE INTERACTION BETWEEN ACCLIMATIZATION METHOD 1 AND NPK+NAA TREATMENT GAVE THE LEAST VALUE IN LEAF AREA. ALSO, THE INTERACTION BETWEEN METHOD 3 AND NAA GAVE THE LOWEST VALUE OF PREVIOUS charACTER. ? 2. CHLOROPHYLL CONTENT: A THE INTERACTION BETWEEN ACCLIMATIZATION METHOD 2 AND FERTILIZATION WITH NPK OR SPRAYING WITH NAA INCREASED CHLOROPHYLL CONTENT IN OLD LEAVES. B THE INTERACTION BETWEEN ACCLIMATIZATION METHOD 2 AND NPK TREATMENT INCREASED CHLOROPHYLL CONTENT IN NEW LEAVES COMPARED WITH ALL TREATMENTS IN THE FIRST SEASON. ALSO, ACCLIMATIZATION METHOD 1 GAVE THE SAME RESULT WITH UNTREATED PLANTS IN THE SECOND SEASON. C ACCLIMATIZATION METHOD 1 RECORDED THE LOWEST VALUES IN THIS charACTER WITH NPK+NAA. 3. CHEMICAL ANALYSIS: 3.1. TOTAL SOLUBLE SUGARS: A ACCLIMATIZED SHEFFLERA ARBORICOLA PLANTS BY METHOD 2 AND TREATED WITH NPK RECORDED HIGHLY INCREASING IN TOTAL SOLUBLE SUGARS. B THE INTERACTION BETWEEN ACCLIMATIZATION METHOD 2 AND NAA TREATMENT RESULTED IN INCREASING OF TOTAL SOLUBLE SUGARS. C ACCLIMATIZATION METHOD 1 COMBINED WITH NAA RECORDED THE LOWEST VALUE IN THIS ATTRIBUTE. 3.2. MINERAL CONTENTS: A THE INTERACTION BETWEEN ACCLIMATIZATION METHOD 2 AND NPK TREATMENT INCREASED NITROGEN CONTENT. B THE INTERACTION BETWEEN ACCLIMATIZATION METHOD 2 AND NPK OR NPK+NAA TREATMENTS INCREASED NITROGEN, PHOSPHORUS, AND POTASSIUM CONTENTS COMPARED WITH NONACCLIMATIZED PLANTS. C ACCLIMATIZATION METHOD 3 ONLY OR COMBINED WITH NAA GAVE THE HIGHEST PHOSPHORUS AND POTASSIUM PERCENTAGES. SECOND EXPERIMENT (BRASSAIA ACTINOPHYLLA): 1. VEGETATIVE charACTERS: 1.1. NUMBER OF LEAVES: 1.1.1. NUMBER OF NEW LEAVES FORMATION: THE INTERACTION BETWEEN ACCLIMATIZATION METHOD 2 AND FERTILIZATION WITH NPK INDUCED THE HIGHEST INCREASING OF NEW LEAVES FORMATION DURING THE INTERIOR ENVIRONMENT PERIOD. 1.1.2. NUMBER OF LEAF ABSCISSION: A THE LOWEST NUMBER OF LEAF ABSCISSION OF BRASSAIA ACTINOPHYLLA PLANTS DURING THE INTERIOR ENVIRONMENT PERIOD WAS OBTAINED WHEN THE CONTROL PLANTS WERE ACCLIMATIZED BY METHOD 2 OR TREATED WITH NPK. B ACCLIMATIZATION METHOD 3 WITH NPK+NAA CAUSED THE HIGHEST INCREASING IN LEAF ABSCISSION DURING THE INTERIOR ENVIRONMENT PERIOD. ALSO, THE NONACCLIMATIZED PLANTS WHEN TREATED WITH NPK+NAA WERE SIMILAR IN THAT RESPECT. 1.1.3. TOTAL NUMBER OF LEAVES AT THE END OF EXPERIMENT: A THE HIGHEST NUMBER OF LEAVES AT THE END OF THE EXPERIMENT OF BRASSAIA ACTINOPHYLLA OBTAINED WHEN THE NONACCLIMATIZED PLANTS WERE TREATED WITH NPK. B THE INTERACTION BETWEEN ACCLIMATIZATION METHOD 2 AND FERTILIZATION WITH NPK GAVE THE HIGHEST NUMBER OF TOTAL LEAVES COMPARED WITH OTHER SHADING METHODS. 1.2. PLANT HEIGHT: 1.2.1. INCREASING IN PLANT HEIGHT: a?DURING THE INTERIOR PERIOD, PLANTS ACCLIMATIZED BY METHOD GAVE THE HIGHEST INCREASING IN PLANT HEIGHT WHEN TREATED WITH NPK IN THE FIRST SEASON COMPARED WITH OTHER SHADING METHODS. b?DURING THE SECOND SEASON, THE INTERACTION BETWEEN ACCLIMATIZATION METHOD 3 AND WITH NAA CAUSED HIGHLY INCREASING IN PLANT HEIGHT. 1.2.2. FINAL PLANT HEIGHT: A NONACCLIMATIZED BRASSAIA ACTINOPHYLLA PLANTS RECORDED THE TALLEST PLANTS WHEN TREATED WITH NPK. B PLANTS OF BRASSAIA ACTINOPHYLLA WERE THE TALLEST WHEN ACCLIMATIZED BY METHOD 3 AND TREATED WITH NPK COMPARED WITH THE OTHER METHODS IN THE FIRST SEASON. DURING THE SECOND SEASON, PLANTS WHICH WERE ACCLIMATIZED BY METHOD 3 AND TREATED WITH NAA WERE THE TALLEST PLANTS. 1.3. TRUNK CALIPER: A UNTREATED PLANTS AND ACCLIMATIZED BY METHOD 3 RECORDED THE HIGHEST THICKNESS IN TRUNK CALIPER IN THE FIRST SEASON. B THE COMBINATION BETWEEN NONACCLIMATIZATION AND NPK TREATMENT CAUSED THE HIGHEST INCREASING IN TRUNK CALIPER IN THE SECOND SEASON. 1.4. LENGTH OF TERMINAL THREE INTERNODES AND PETIOLE LENGTH: A NONACCLIMATIZED PLANTS GAVE THE HIGHEST LENGTH OF TERMINAL THREE INTERNODES AND PETIOLES WHEN NOT TREATED WITH ANY CHEMICAL. 1.5. LEAF AREA: A THE HIGHEST LEAF AREA RECORDED WITH NONACCLIMATIZED PLANTS TREATED OR NOT WITH NPK. B THE INTERACTION BETWEEN ACCLIMATIZATION METHOD 2 AND TREATMENT OF NPK INCREASED LEAF AREA COMPARED WITH OTHER