Method for improving saline-alkali resistance and drought resistance of cotton

[0030] Embodiment 1 of the present invention discloses a method for improving cotton salt-alkali and drought resistance, and the technical scheme adopted is as follows:

[0031] S1, organic fertilizer for saline-alkali land composed of 25 parts of urea, 25 parts of chicken manure with an organic matter content of 50-70%, 10 parts of humic acid, 15 parts of potassium dihydrogen phosphate, 20 parts of biomass straw, and 20 parts of biochar Apply to the soil to be planted with cotton, and perform deep plowing, the depth of deep plowing is 25-35cm, and apply 350g per mu;

[0032] S2, screen out mature and plump cotton seeds, soak them in warm water, set the water temperature constant at 30°C for 3 hours, dry the cotton seeds after shelling, and then irradiate them with ultraviolet rays for 20 minutes. The wavelength of the ultraviolet light source is 260-265nm. Soak in potassium permanganate solution with a mass fraction of 0.2%-0.3% for 8 hours, soak in 150-200mg / L gibberellin so...

[0036] Embodiment 2 of the present invention discloses a method for improving cotton salt-alkali and drought resistance, and the technical scheme adopted is as follows:

[0037] S1, organic fertilizer for saline-alkali land composed of 40 parts of urea, 30 parts of chicken manure with an organic matter content of 50-70%, 15 parts of humic acid, 20 parts of potassium dihydrogen phosphate, 25 parts of biomass straw, and 25 parts of biochar Apply to the soil to be planted with cotton, and perform deep plowing, the depth of deep plowing is 25-35cm, and apply 450g per mu;

[0038] S2, screen out mature and plump cotton seeds, soak them in warm water, set the water temperature constant at 30°C for 5 hours, dry the cotton seeds after shelling, and then irradiate them with ultraviolet rays for 25 minutes. Soak in potassium permanganate solution with a mass fraction of 0.2%-0.3% for 10 hours, soak in 150-200 mg / L gibberellin solution for 10 hours, and prepare 60 parts of water, 6 parts...

[0042] Embodiment 3 of the present invention discloses a method for improving cotton salt-alkali and drought resistance, and the technical scheme adopted is as follows:

[0043]S1, organic fertilizer for saline-alkali land composed of 32 parts of urea, 27 parts of chicken manure with an organic matter content of 50-70%, 13 parts of humic acid, 18 parts of potassium dihydrogen phosphate, 22 parts of biomass straw, and 22 parts of biochar Apply to the soil to be planted with cotton, and perform deep plowing, the depth of deep plowing is 25-35cm, and apply 400g per mu;

[0044] S2, screen out mature and plump cotton seeds, soak them in warm water, set the water temperature constant at 30°C for 4 hours, dry the cotton seeds after shelling, and then irradiate them with ultraviolet rays for 23 minutes. The wavelength of the ultraviolet light source is 260-265nm. Soak in potassium permanganate solution with a mass fraction of 0.2%-0.3% for 9 hours, soak in 150-200mg / L gibberellin sol...