AGROTECHNOLOGY OF GROWING CALIFORNIA POPLAR (Populus fremontii) SEEDLINGS

Аннотация

This article is devoted to the development of agrotechnology for growing standard California poplar seedlings in Uzbekistan. The experiments showed that the viability of cuttings cut from new branches in November is high. Cuttings were planted with a length of 10–35 cm and a diameter of 5–18 mm, and as a result, cuttings with a length of 25–30 cm and a diameter of 12–15 mm showed the highest indicators (41 cuttings). This option was found to be superior in terms of root formation rate and viability. Scientific recommendations were developed on the agrotechnology of growing seedlings - cutting preparation, planting date, irrigation, fertilization, and methods of seedling extraction. The study is of practical importance inestablishing high-quality timberpoplar plantationsin Uzbekistan. Key words: California poplar (Populus fremontii), branch, cuttings, bud, callus, agrotechnology. Introduction. The California poplar (Populus fremontii) is a tall tree belonging to the willow family (salicaceae), a genus of poplars (Populus). This tree is named after the 19th-century American explorerand traveler John S.It is named afterFremont. The California poplar (Populus fremontii) has a height of 15-35 m, a diameter of 1.5 m, wide, pyramidal and egg-shaped branches, and is a large tree with a single or branched trunk. The bark cracks along the neck, the young branches turn blue, and the trunk of the tree is dark gray. The branches are ashen or brownish in color.The Aliphornian poplar (Populus fremontii) has a height of 15-35 m, a diameter of 1.5 m, wide, pyramidal and ovoid branches, and is a large tree with a single or branched trunk. The bark of the neck cracks, the young branches turn blue, and the trunk of the tree is dark gray. The branches are ashen or brownish in color. The leaves are ovate or deltoid, 3-7 cm high, 3.5 cm wide, pointed, toothed at the edge, the leaf is striped, slightly pubescent. The leaf blade is 2.7-3.5 cm, slightly pubescent or hairless. Male flower buds 10-12 mm high, ovate, brown, glabrous. The shrub is 6.9 cm high, 1 cm wide, multi- flowered, with 24 flowers arranged in a short hairless band. Rosehip leaves are veiled, brown, 3-5 mm long, wide or rounded, with a serrated base, without pubescence, with a deep groove along the edge.The mouth is 6.9 cm high, 1 cm wide, multi-flowered, with 24 flowers arranged in a short hairless band. Rosehip leaves are veiled, brown, 3-5 mm long, wide or rounded, with a serrated base, without pubescence, with a deep groove along the edge. The flower-bearing achene buds are 14-16 mm tall, smooth, greenish-brown, sticky, hairless. A shrub 5-7 cm high, 0.8 cm wide, short-pubescent, multi-flowered, 33-40 pieces of flower, located in an inflorescence with a diameter of 15 mm. Rosehip leaves are veiled, triangular in shape, with a long ciliated tip. The cone is ovate or rounded, 5-7 mm long, 3.5-5 mm wide, three-partitioned, glabrous, small. The seeds are large, 2mm high, 1mm wide, white, oblong, with short felt hairs [1]. page197 INTERNATIONALJOURNALOF ARTIFICIALINTELLIGENCE ISSN:2692-5206,ImpactFactor:12,23 AmericanAcademicpublishers,volume05,issue09,2025 Journal: https://www.academicpublishers.org/journals/index.php/ijai The California Poplar (Populus fremontii) is distributed in the southwestern United States and Mexico. In the United States, it can be found naturally in California, Idaho, Nevada, Utah, Arizona, New Mexico, Texas, and Colorado.The Ifornian Poplar (Populus fremontii) is distributed in the southwestern United States and Mexico. In the United States, it can be found naturally in California, Idaho, Nevada, Utah, Arizona, New Mexico, Texas, and Colorado. In Mexico, it can be found in Baja California, Baja California Sur, Sonora, Chihuahua, Coahuila, Nuevo Leon, Mexico (state) and Puebla. This tree grows and develops mainly along the shores of reservoirs, rivers, lakes, wetlands in areas up to 2000 meters above sea level. Currently the largest P. In the USA. The fremontii tree grows in the Skull Valley in Arizona. In 2012, his measured body circumference was 14,100 mm, height 31 m and width of horns 45.6 M [7]. The California Poplar (Populus fremontii) is a tree introduced to our country, which is mainly planted a lot in order to obtain wood.fremontii grows in the Skull Valley in Arizona. In 2012, his measured body circumference was 14,100 mm, height 31 m and width of horns 45.6 M [7]. The California Poplar (Populus fremontii) is a tree introduced to our country, which is mainly planted a lot in order to obtain wood. When individual parts (trunk, bark, and other parts) are examined to determine if different parts of the tree are suitable for processing. The most valuable component of the trunk wood, cellulose, is most present in the trunk of the tree, accounting for 42.7%, and theleast —23.8%inthebark [2,3,4,5,6]. The experimental part. The time of preparation of the stem for cuttings in Uzbekistan is the end of November-beginning of December. Cutting