“配方优化施肥”是国家“七五”期间的重点推广项目。经济合理施肥具有经济、生态和社会的效益。随着对高产的追求,化肥施用很少是充分利用投入的过程,特别是氮肥失控,不仅造成植株郁蔽,光合效应降低,而且因打破作物自然生态系的微生物间动态平衡而罹病;土壤残留氮,变成强致癌物—亚硝酸盐,污染环境,毒害人畜。本试验旨在提高肥料效应,克服不良的副作用,特根据土壤类型的缺素状况,摸索区域性的最佳经济施肥量,并联系土壤建立产量和最佳施肥模 “Formulation optimization fertilization” is the national “seven five” during the promotion of key projects. Economic and rational fertilization with economic, ecological and social benefits. With the pursuit of high yield, the application of chemical fertilizers is seldom used to fully utilize inputs, especially the uncontrolled application of nitrogen fertilizers, which not only leads to darkening of plants but also reduces the photosynthetic effect, but also causes disease due to breaking the dynamic balance of microorganisms in crop natural ecosystems. Nitrogen, into a strong carcinogen - nitrite, pollute the environment, poisoning humans and animals. This experiment aims to improve the fertilizer effect, to overcome the adverse side effects, especially according to the lack of soil types, to explore the best regional economic fertilizer, and contact with the soil to establish production and the best fertilization mode