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E: info@sdjinmai.com
E: info@sdjinmai.com
No. 6888 Jiankang East Street, High-tech Zone, Weifang, Shandong, China
The growth and development of cotton go through stages such as the seedling stage, bud stage, flowering stage, boll opening stage, and harvest stage. A notable characteristic is that the period when both vegetative and reproductive organs grow simultaneously is relatively long. Before flowering, the focus is on root growth, stem elongation, and leaf expansion for vegetative growth; after the initial flowering stage, the emphasis shifts to flower bud formation, flowering, and boll setting for reproductive growth. The nutritional requirements for NPK vary at different growth stages of cotton. From the flowering stage to the boll opening stage, NPK nutrient accumulation accounts for over 60% of the total, reaching its peak, followed by the bud emergence stage to the flowering stage. Before the peak fertilizer absorption period, sufficient fertilizers should be applied to meet the nutrient needs of the plant at different growth stages.
| Serial number | phenological period | Use a fat solution | Management points |
1 | Outflow water | When seedlings emerge on drip water island, biological bacteria fertilizer + JINMAI Motive Power® 1.5g/m2 (1.5g/m2 for sandy land, polyglutamic acid + alkaline pressing products) | When seedlings emerge from drip irrigation, it is essential to use a single application of water and ensure the amount is appropriate—neither too much nor too little. If the water is too abundant, the soil temperature will not rise, especially during cold snaps when the ground temperature cannot warm up, leading to issues such as seed rot, root rot, slow emergence, missing plants, broken rows, or dead seedlings with rotten roots. Conversely, if the water supply is insufficient, some areas may fail to produce any seedlings |
2 | 80% germination | Use 1.5g/m2 of JINMAI Motive Power® + 1.5g/m2 of urea, combined with foliar spraying of 500-800 times of JINMAI-Healthier Crop® + 500-800 times of zinc fertilizer | When the cotton seedlings emerge about 80%, a uniform seedling adjustment is carried out to promote the early growth of strong seedlings and rapid rooting, so as to achieve the purpose of full and even seedlings, and at the same time to kill the cotton thrips. |
3 | Two leaf stage | At this time, potassium calcium magnesium 3g + blood protein peptide 0.75g/m2, potassium dihydrogen phosphate (or liquid phosphorus and potassium) 500-800 times combined with medium and trace elements (50g+50g), plus chitosamine 0.1~0.2g, can be sprayed once. | When cotton enters the second leaf stage, it is in its critical period for phosphorus absorption and also the induction period for female hormones. This helps root growth and eliminate thrips! It also promotes flower bud differentiation when the cotton seedlings reach four leaves and one heart, allowing them to flower earlier. Additionally, it aims to achieve the goal of being flat at the second leaf stage, wide at the fourth leaf stage, and upright at the sixth leaf stage |
4 | squaring stage | When the first bud of the fourth fruit branch of cotton appears 3mm, spray 500-800 times with JINMAI-Blooming® and 30-50g of boron fertilizer for foliar spraying. Drip irrigation: 1.5kg of urea + 2kg of phosphate fertilizer + 0.5kg of blood protein peptide | The field management during the bolling stage is a crucial period. It is a time when both vegetative growth and reproduction proceed simultaneously, as well as a period of rapid root development. During this phase, the focus of cotton management should be on applying boll fertilizer steadily, aiming for robust growth without excessive or shaded conditions—meaning large rows should not be fully sealed, small rows should be semi-sealed, and there should be a clear line in between, ensuring good ventilation and light penetration. This helps prevent the premature shedding of lower bolls, accelerates the rapid differentiation of fruit branches and bolls, and promotes the rapid enlargement, development, and maturation of reproductive organs. |
5 | JINMAI-Blooming® 500-800 times with foliar spraying + medium and trace elements (50g+50g) Drip irrigation: urea 1.5kg+2kg potassium calcium magnesium + blood protein peptide 0.5kg | ||
6 | Leaf spraying: medium and trace elements (50g+50g) drip irrigation: urea 1.5kg+2kg potassium calcium magnesium + blood protein peptide 0.5kg | ||
7 | The flowering period | Drip irrigation: urea 2kg + phosphate fertilizer 2kg+0.5kg potassium fertilizer, foliar spraying JINMAI-Kanger Green® 0.03ml/m2 | |
8 | Now flowers | Drip irrigation: urea 2kg + phosphate fertilizer 2kg+0.5kg potassium fertilizer + blood protein peptide 0.5kg | |
9 | blossing and boll-forming stages | Drip irrigation: urea 3kg+0.5kg phosphate fertilizer + 2kg potassium fertilizer (add liquid phosphorus and potassium 0.03ml/m2 when spraying) | If manual topping is required, the operation should be completed by July 5th; chemical topping needs to be finished by July 10th. Generally, the growth points should dry up by 0.5 to 1 cm, and one or two fruit branches should bear one bell each, ensuring no nutrient loss. The management focus for this period is to apply more flower and fruiting branch fertilizer, aiming to ensure that more pre-blooming peaches and full-blooming peaches are produced, with the goal of covering the top with fruiting branches |
