高分子马铃薯专用缓释肥的制备及肥效研究

Study on the Preparation and Fertilizer Efficiency of the Slow Release Macromolecular Fertilizer Special for Potato

以自制的脲甲醛低聚物和磷酸二氢钾-磷酸混合液反应合成了一种多营养元素高分子缓释化肥.通过控制投料比使其N∶P2O5∶K2O=1∶0.8∶0.4,符合大田试验对马铃薯专用肥提出的要求.大田试验结果表明:单独施用高分子化肥的增产率为15.89%,高分子化肥与农家肥混合施用的增产率为53.29%,明显高于常规施肥(尿素+过磷酸钙+农家肥)时的增产率46.71%.

The slow release macromolecular fertilizer containing diverse nutrition was synthesized by condensation reaction between the homemade low molecular urea-formaldehyde and the compound of potassium dihydrogen phosphate and phosphoric acid. The nutrition of the fertilizer （N ：P2O5： K2O= 1 ： 0. 8 ： 0.4） can satisfy the nutrition requirement of potato growth in the field experiment by adjusting the proportion of raw materials. The field experiment results showed the macromolecular fertilizer increased the yield of the potato by 15. 89%, the macromolecular fertilizer with livestock and normal potato-fertilizer（urea＋livestock＋calcium superphosphate） increased the yield of the potato by 53.29% and 46.71%, respectively.