The Research Of Polymer Materials About The Effect To The Fertilizer Slow-release

Currently, the first main problems in the chemical fertilizer, large amount of fertilizer use and low utilization; and the unreasonable chemical fertilizer cause environmental pollution, lower the quality of agricultural products and serious food security problems.In order to reduce leaching losses of fertilizer in the tropical environment and improve the utilization of fertilizer, we study the in the environment of tropical regions by the indoor simulation experiments:the inhibition of urea nitrogen leaching by the four kinds of polymer materials; four high molecular materials of P, K prime leaching; trial fertilizer leaching law; the trial of the effect of the trial fertilizer on maize.The results show that:1, The leaching effect is significantly different when four kinds of polymer materials in different concentrations, different time and different leaching times under the condition, among them, PADS, PEES and CAAS on nitrogen leaching in inhibition of the most significant effect when the proportion at A5, B3, D2respectively. These types of materials on nitrogen leaching in inhibiting effect to PEES is most significant and lasting, after six times leaching,the leaching inhibition rate up to32.74%, and CAAS, PADS inhibition rates were28.32%,25.73%.2, CAAS, PADS, LEES and PEES effect the P, K leaching embodies in mainly: it has positive effect when A5, C2, C3, B3on P release, the other CAAS, PADS, PEES treatment can promote the P vasopressin release potential; the rest treatment can inhibit the K element leaching except B3, Cl, C2and C3, with D4, D5the supreme inhibition rate.3, The used A, B, D trial fertilizer corn plant of the portion on the stem was significantly higher than that of conventional urea important application; and, when used A, B, D, the maize plant improves the utilization rate of N,and with the most significant at D, from big to small order is D> B> A> CK.