| Developing continual agriculture and controlling environment pollution are the direction of the future agriculture progress. Slowly-release fertilizers are adapt to the demands: it can make nitrogen be effective used; it can avoid money wasted because of a great deal of fertilizer used and can prevent fertilizers polluting surroundings. In this article, two kinds of organic materials, two kinds of inorganic mineral materials and different level nitrogen fertilizers were respectively blended, then were tried on millet in basin to study their slowly releasing effect and selected the best of them. The results showed that: 1.According to the tested materials'slowly released characters, as a whole, organic materials are better than inorganic mineral materials. From the best slowly released effect to the worse released effect, the four materials were ranked as lignite, waste residue drew furfural, zeolite, diatomite. 2.The test in basin showed that the two inorganic mineral materials-Diatomite and zeolite blended lower CO(NH2)2 and NH4HCO3,both of them had good effect, but the latter was better than Diatomite. 3.The two organic materials-Waste residue drew furfural and Lignite blended lower CO(NH2)2 and NH4HCO3,both of them had better effect than inorganic mineral materials in nitrogen slowly released aspect. The available nitrogen's release and the millet's economic output told us that Lignite was better slowly-release material in the two organic materials, but the millet's biologic output and it's length of fringe showed that Waste residue drew furfural was better than Lignite. 4.According the data of the fertilizers utilization rate, the admixture of NH4HCO3(4.05g) and Lignite(3g) ranked in the first and its rate was 77.25%, then NH4HCO3(4.05g) and Waste residue drew furfural(3g), reached 67.97%, CO(NH2)2(1.5g) and Lignite(3g)[67.10%], CO(NH2)2(1.5g) and Waste residue drew furfural(3g) [57.97%], the result showed that organic mineral materials blended fertilizers, their utilization rates were much better , more over, the... |
