摘要
氮磷钾肥料对高吸水树脂吸水能力的影响实验结果表明 :随着各种肥料浓度的增加 ,高吸水树脂吸水率下降 ,各种肥料对高吸水树脂的吸水能力影响的顺序为 :尿素 <氯化钾 ,硝酸铵 <硫酸铵 ,硫酸钾 <碳酸氢铵<磷酸二氢钾 <过磷酸钙。研究认为 :高吸水树脂是一类高分子电解质 ,受水中离子的破坏而改变吸附能力 ,其在肥料的存在下的吸水行为可用聚电解质吸水膨胀的热力学理论加以解释。尿素属于非电解质肥料 ,对高吸水树脂吸水率影响较小。树脂在用于农田栽培时 ,可与尿素和低浓度的钾氮素肥料混用 ,尽量避免和电离性强的肥料高浓度混合使用。按丙烯酸∶肥料为 2 0∶1合成了肥料复合型高吸水树脂 ,吸水倍率为 4 0 0g/g左右 ,其中所复合的肥料具有良好的缓释功能。
The influence of chemical fertilizer on water absorbing ability of super water absorbent was investigated. The results showed that the water absorbing ability of the super water absorbent decreased along with the increase of concentrations for various fertilizers, and the influencing degrees of various fertilizers on water absorbing ability of super water absorbent were as follows: urea<potassium chloride, ammonium nitrate<ammonium sulphate, potassium sulfate<bicarbonate ammonium<potassium dihydrogen phosphate<calcium superphosphate. It is considered that the super water absorbent is a kind of electrolyte of polymer, and the water adsorbing ability changes with the damage of ion amounts in water. The water absorbing behavior may be explained by the thermodynamic expansion theory of electrolyte polymer in water. Urea is a kind of non-electrolyte fertilizer and has less influence on water absorbing ability. Super water absorbent used in farmland could mix with urea and low density of potassium nitrogen fertilizers, but avoid mixing with fertilizers of high concentration and strong ionization as far as possible. When the ratio of crylic acid to fertilizer is 20∶1, fertilizer complex super water absorbent was synthesized. The complex resin has good slow release function while the water absorbing ability is about 400 gram water per gram resin.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2004年第5期37-38,共2页
Journal of Northeast Forestry University
关键词
化肥
高吸水树脂
复合树脂
吸水性能
Super water absorbent
Chemical fertilizer
Complex resin
Slow release
