共查询到19条相似文献,搜索用时 93 毫秒
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控释肥料流化床包膜工艺研究 总被引:2,自引:1,他引:2
[目的]解决化肥利用率低、肥效期短的问题。[方法]以树脂A和B配置液为包膜壁材,尿素为包膜芯材,利用自行研制的流化床包膜机进行试验。[结果]调温器电压值对热风温度影响明显,电压值控制在100~125 V,热风温度达到要求。包膜工艺参数最佳组合为热风温度50~60℃,尿素装入量200 g/次,喷头压力0.4~0.5 MPa,包膜溶液进样量1.0~1.5 ml/次,包膜时间30 min。[结论]通过试验得出的工艺参数可为包膜肥料的研制和生产提供一定的理论基础。 相似文献
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无机包膜缓/控释肥料生产工艺与肥效探讨 总被引:11,自引:0,他引:11
对缓/控释肥料的定义、分类、材料、工艺和控释性能的评价等方面进行了讨论,并综述了缓/控释肥料研究与生产的现状及其发展趋势。 相似文献
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Characteristics and Performance Of Novel Water-Absorbent Slow Release Nitrogen Fertilizers 总被引:5,自引:0,他引:5
HE Xu-sheng LIAO Zong-wen HUANG Pei-zhao DUAN Ji-xian GE Ren-shan LI Hong-bo GENG Zeng-chao 《中国农业科学(英文版)》2007,6(3):338-346
In this article, a research on the characteristics and performance of water-absorbent slow release nitrogen fertilizer (WASRNF) using infrared spectroscopy (IR), scanning electronic microscopy (SEM), differential scanning calorimetry (DSC), and thermogravimetry analysis (TGA), was present. The results indicate that the water absorbency and nitrogen analysis of WASRNF is 103 g g^-1 and 30%, respectively, and WASRNF exhibits approximately neutral pH and very low salt index. WASRNF is a copolymer of nitrogen fertilizer and super absorbent polymer (SAP) monomers which is formed through hydrogen bond interaction, and the molecule contains hydrophilic groups, which is responsible for the absorption and water retention capacity of the molecule. WASRNF is a gel that exhibits the ability to swell, but does not dissolve in water. WASRNF shows non-homogenous nature as a whole, but in local zone it is homogenous, the copolymer molecule shows chain network that is the physical structure responsible for absorption and retention of water in WASRNF. The water retained in WASRNF exists as free and nonfreezing bound and freezing bound water states, with the free and the nonfreezing water accounting for more than 95% of water retained in WASRNF, and the nonfreezing bound water for less than 5%. WASRNF functions in delaying the release of nitrogen from it, thereby serving a novel slow release nitrogenous fertilizer. 相似文献
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甲壳素包裹型缓释肥料养分释放特性研究 总被引:1,自引:1,他引:0
[目的]研究甲壳素包裹型缓释肥料(CCF)的养分释放特性。[方法]通过对CCF在30℃水中的进行释放试验,来描述其养分释放特性。[结果]结果表明,可将CCF的释放过程分为稳定阶段和衰退阶段;CCF在水中的溶出曲线为L型,且观察不到明显的滞后阶段;在稳定阶段,释放速率dMt/dt为一定值;在衰退阶段,释放速率随时间的延长而下降,且下降趋势逐渐缓慢,可以描述为dMt/dt=29.337t-1。[结论]CCF具有长效,缓释的作用,能够促进农作物的稳定生长,而实现作物的增产。 相似文献
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