MEDIUM FIBER S-8290 AND S-6775 COTTON AGROTECHNICS OF SOWING VARIETIES

Аннотация

In the germination of the seed, the residual fibre content on the seed gives good results when sowing does not exceed 0.8% in medium-fibre cotton varieties and 0.4% in fine-fibre cotton varieties. KEYWORDS: Norm, term, soil, cultivator, several plants. INTRODUCTION planted in soil with insufficient temperature, most of them will rot, and the rest will grow The Republic of Uzbekistan is the weak and sparse. In determining the timing of northernmost cotton-growing country in the sowing the seeds should take into account world. The climate of this place is sharply that cotton is a heat-loving plant, the continental, with rainy days in the spring temperature for normal growth and lasting until the first ten days of March and development will be 20–250 [4-9]. Based on even April. Therefore, the optimal time for the results of many years of experiments sowing seeds is the second decade of April conducted by research institutions and the and the fifth day of May [1-3]. To grow an experience of advanced farms, the sowing of early-maturing, high-quality cotton crop, the seeds should be completed in the following seeds need to be planted in well-drained, periods: well-drained, well-drained soil. If seeds are “MEDIUM FIBER S-8290 AND S-6775 COTTON AGROTECHNICS OF SOWING VARIETIES” P age 49 | 6 1. April 5-15 in Tashkent and Fergana regions. 6. It is recommended to sow in the Khorezm region and the southern districts of the 2. In Syrdarya, Jizzakh, Namangan, Andijan, Autonomous Republic of Karakalpakstan on Bukhara regions on April 1-15. April 10-25, in the northern districts of the 3. In the foothills of the Andijan region and Autonomous Republic on April 15-30. For Samarkand region on April 5-20. information, hairless seeds are sown 5-6 days later than hairy seeds. Depending on the 4. March 25 to April 10 in the southern weather, these periods can be postponed 2-3 districts of the Surkhandarya region, April 1- days forward or backwards. The timing and 15 in the northern districts. depth of sowing should be determined by the 5. From March 25 to April 15 in the southern soil conditions of each farm, even each field districts of the Kashkadarya region, from April [10-17]. 1 to 15 in the northern districts. Figure 2. In our experiment in the conditions of grassland soils of the Fergana region, according to the soil conditions, hairy seeds of cotton varieties S8290 and S6775 were planted to a depth of 3-4 cm at an average daily stable soil temperature of not less than 120C at a depth of 10 cm. When sowing seeds, it should be taken into account that the residual fibre content on the seeds did not exceed 0.8% in medium-fibre cotton varieties and 0.4% in fine-fibre cotton varieties, which showed good results in germination [18-23]. “MEDIUM FIBER S-8290 AND S-6775 COTTON AGROTECHNICS OF SOWING VARIETIES” P age 50 | 6 Figure 2. If the amount of residual fibre on the seeds is more than the norm, they will stick to each other, the seeds will not fall evenly from the planting apparatus, and cotton seedlings will sprout sparingly. The research was carried out on the basis of the manuals "Methods of field experiments with cotton wool", "Methods of determining the properties of cotton fibre" and "Methods of field experiments" adopted at UzPITI. based on mathematical and statistical analysis. In our study, we observed that in addition to the degree of hairiness on the seed, the application of mineral fertilizers to the seed was also effective when the seed was sown in proportion to the soil depth and row spacing. Figure 3. According to the scientific literature, cotton, from the given fertilizers are not stored in the soil for a sprouting to weeding, requires 7-10% of the long time. In our experiment, 30-40 kg of urea and annual fertilizer norm in the amount of nitrogen 40-50 kg of amorphous per hectare were planted and about 5-7% of pure phosphorus. When cotton with seeds in front of each row, 6-8 cm away from sprouts, it no longer has the ability to fully absorb each row where the seeds were planted. Gave the nitrogen and phosphorus present in the soil. good results when planted at a depth of -12 cm. In Therefore, nitrogen, phosphorus and potassium addition, timely cultivation of cotton row spacing fertilizers are given at the same time as the sowing is one of the most important factors to achieve of seeds are very beneficial for the rapid high yields. By softening the row spacing of development of cotton. These fertilizers have a cotton, the activity of microorganisms present in positive effect on the faster absorption of mobile the soil is also improved, increasing the plant’s nitrogen, phosphorus and potassium elements in ability of micro and macro elements in the soil the soil. However, the problem is that the fruits of [24-27]. As a result, the vitality of plant roots is “MEDIUM FIBER S-8290 AND S-6775 COTTON AGROTECHNICS OF SOWING VARIETIES” P age 51 | 6 improved by enriching them with oxygen through processing, the working bo