在肥料的选用中,必须考虑肥料不同养分的形态。各种作物不仅对养分形态的需求有差别,而且对不同形态养分吸收能力也不同;同一作物、不同品种及不同生长时期需肥情况也有差异。因此,掌握不同肥料形态的特性,充分发挥各种肥料效用非 In the choice of fertilizer, fertilizer must be considered the different forms of nutrients. All kinds of crops not only have differences in nutrient requirements, but also absorb nutrients in different forms. The same crop, different varieties and different growth periods have different needs. Therefore, to master the characteristics of different forms of fertilizer, give full play to the effectiveness of various fertilizers