Nitrogenous fertilizers of prolonged action were developed on the basis of carbamide （urea）. Technological schemes and parameters are offered to obtain restructured carbamide. Possible versions of degradation of dif...Nitrogenous fertilizers of prolonged action were developed on the basis of carbamide （urea）. Technological schemes and parameters are offered to obtain restructured carbamide. Possible versions of degradation of different structure prolonged action fertilizers are considered. It was shown that the most favorable conditions for degradation of polymer molecules are created when molar ratio of the initial carbamide and aldehyde is within 1：1-1.3, correspondingly. At such terms the linear structure molecules with rare cross-links are formed. Such structure is more accessible for penetration of ureasive ferments into polymer molecules.展开更多
文摘Nitrogenous fertilizers of prolonged action were developed on the basis of carbamide （urea）. Technological schemes and parameters are offered to obtain restructured carbamide. Possible versions of degradation of different structure prolonged action fertilizers are considered. It was shown that the most favorable conditions for degradation of polymer molecules are created when molar ratio of the initial carbamide and aldehyde is within 1：1-1.3, correspondingly. At such terms the linear structure molecules with rare cross-links are formed. Such structure is more accessible for penetration of ureasive ferments into polymer molecules.
