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采用性能测试、砂柱淋洗、模拟降雨及不同田间持水量下室内土壤培养试验,研究了适用于半干旱条件的微水溶性胶结包膜缓释肥料的材料性质及氮素溶出规律.结果表明,微水溶性包膜材料致密,透水率为27.52g/(m2.h),且具有一定的生物降解性能.与普通尿素相比,微水溶性胶结包膜缓释肥料具有明显的缓释作用,8.5%田间持水量为氮素溶出下限,随降雨或灌水可缓慢释放出一定的氮素,微水溶性效果已初步体现.
The properties of the water-soluble cementitious coated slow-release fertilizer suitable for semi-arid conditions and the rules of nitrogen dissolution were studied by using the performance test, sand column elution, simulated rainfall and indoor soil culture experiments under different field water holding capacity. , The micro-water-soluble coating material is dense, the water permeability is 27.52g / (m2.h), and has certain biodegradability.Compared with the common urea, the micro-water-soluble cementitious coated slow release fertilizer has a significant sustained release effect , And the 8.5% field water holding capacity is the lower limit of nitrogen dissolution. With the rainfall or irrigation, a certain amount of nitrogen can be slowly released, and the water-soluble effect has been initially shown.