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复合肥比单质化肥增产增收,已为广大农民所认识。但如何选购优质的复合肥,以达到节资增产的目的,目前尚未被广大农民所掌握。因此,如何根据土壤特性、肥料特性、农业生产现状等来选购优质复合肥,是广大农民需要了解和掌握的。一、按土壤性状科学选用复合肥对微碱性、有机质含量偏低(土壤pH值一般为8.0左右)、有效氮和磷缺乏的土壤,一般应选用酸性复合肥,如磷酸一铵或腐植酸类氮磷钾复合肥、氮磷复合肥为宜。但对少数红黏土或酸性棕壤土应选用碱性复合
Compound fertilizer production increase than the single element, has been recognized by the majority of farmers. However, how to buy high-quality compound fertilizer in order to achieve the purpose of increasing production of resources has not yet been mastered by the majority of peasants. Therefore, how to choose high-quality compound fertilizers according to soil characteristics, fertilizer characteristics and agricultural production status is the need of majority peasants to understand and master. First, according to the soil properties of scientific selection of compound fertilizer on the slightly alkaline, low organic matter content (soil pH value is generally about 8.0), effective nitrogen and phosphorus deficiency of the soil, generally should be used acid compound fertilizer, such as monoammonium phosphate or humic acid NPK fertilizer, nitrogen and phosphorus fertilizer is appropriate. However, a small number of red clay or acidic brown earth should use alkaline compound