High density, special-used and long effective compound fertilizer is the main trend of international fertilizer research
and application as well as the state fertilizer development. Depending on the slowly-released long effective preparation, the special-used long effective compound fertilizer which needs for grain and industrial crops production has been developed up. As an advantage of the preparation, the effective period of different sorts of special-used fertilizer could be delayed to 110-160d, the fertilizer utilization ratio increased by 20%. It increased the crops production over 20% compared with the common fertilizer of same price and nutrient, and saved the fertilizer over 20% under the conditions of same yield. The preparation has being in production in several special-used fertilizer factories, the different sorts of special-used long effective compound fertilizer, produced by the factories, have been popularized and applied widely in Xinjiang and Gansu Provinces in recent two years, reaches several thousands hectares. The crops have been applied with the special-used long effective compound fertilizer, including cotton, wheat, corn, beet, peanut, potato, tomato, cowpea, aubergine etc.