Open field pepper "three-phase" å’‹ fertilization
1. Cobalt oxide: usually cobalt oxalate or cobalt carbonate as raw materials calcined at 500-600 ℃ cobalt oxide, the main reaction is as follows:
CoC2O4 == CoO + CO + CO2; CoCO3 == CoO + CO2
2. Cobalt hydroxide: It can usually be neutralized with sodium hydroxide solution in cobalt chloride solution or cobalt sulfate solution. The main reactions are as follows:
Co2 ++ 2OH - == Co (OH) 2 Co (OH) 2 + O2 + 2H2O == 4Co (OH) 3
3. Cobalt chloride: usually available cobalt powder with dilute hydrochloric acid into cobalt chloride solution, and then crystallized by evaporation of cobalt chloride crystals, the main reaction is as follows: Co + HCl --- COCl2; Co + H2SO4 --- COSO4
4. Cobalt sulfate: usually cobalt oxide as raw material, dissolved in sulfuric acid after evaporation crystallization of pink cobalt sulfate crystals, the main reaction is as follows: CoO + H2SO4 == CoSO4 + H2O
5. Cobalt carbonate: It can usually be obtained by precipitation with sodium carbonate solution in cobalt chloride solution or cobalt sulfate solution. The main reactions are as follows:
CoCl2 + Na2CO3 == CoCO3 + 2NaCl
6. Cobalt oxalate: It can usually be precipitated with ammonium oxalate solution in cobalt chloride solution or cobalt sulfate solution. The main reactions are as follows:
(NH4) 2C2O4 + CoCl2 == CoC2O4 + 2NH4Cl
7. Oxidation of high cobalt: cobalt carbonate or cobalt oxalate can usually be heated in oxygen, further oxidation obtained, the main reaction is as follows:
3CoCO3 + O2 ==== Co2O3 ++ CO2; CoC2O4 + O2 ==== Co2O3 + CO2 + CO
8. Cobalt Hydroxide: 4Co (OH) 2 + O2 + 2H2O === 4Co (OH) 3; 2Co (OH) 2 + NaClO + H2O == 2Co (OH) 3 +
2Co (OH) 3 + 6HCl == 2CoCl2 + Cl2 + 6H2O
Cobalt Compounds Cobalt Compounds,Spinel Compounds,Multi-Functional Electrolytic Copper,High-Volume Electrolytic Copper Ningxia Tongji International Trade Co.,Ltd. , https://www.tongjiinternational.com
Watering should be carried out during the fruiting period, and the amount of water should be small to avoid affecting the air permeability of the soil. The fruity period of pepper is the hot and rainy season, and it is necessary to apply fertilizer continuously, usually with water. After heavy rain, it is necessary to pour water in time to improve soil aeration and promote root respiration. At the same time, it is necessary to cultivate the soil at the base of the plant, and the soil should not be too high, about 13 cm.
In the later stage of harvesting, the second peak of pepper production is formed. It is necessary to pour water once every 7-8 days and apply 2~3 times of fertilizer with water. With “wateringâ€, 20 kg of diammonium phosphate per acre is applied; when “white dewâ€, 500 kg of human dung is applied with watering; when “autumnâ€, 300 kg is applied per acre with watering. Human dung is thin. In the late harvest, it is necessary to remove the yellow leaves of the lower part of the pepper in time, and remove the long branches or the branches of the inner layer to facilitate ventilation and light transmission.
(Zheng Hongxing, Agricultural Bureau of Yucheng County, Shandong Province)