论文部分内容阅读
１．化肥用量计算：化肥用量，可根据化肥中有效养份的含量计算。所需化肥重量＝农作物所需养份量÷化肥中所含养份的比重。如水稻每亩需施氨肥５ｋｇ，若施用的是尿素或是碳酸氢氨。则每亩尿素用量＝５÷４６％＝１１ｋｇ；每亩碳酸氢氨用量＝５÷１７％＝３０ｋｇ。２．...
1. Fertilizer dosage calculation: The amount of fertilizer can be calculated according to the content of effective nutrients in fertilizers. Fertilizer required weight = crop nutrients required ÷ share of nutrients contained in fertilizer. Such as rice need to apply ammonia fertilizer per acre 5kg, if the application of urea or ammonium bicarbonate. The amount of urea per mu = 5 ÷ 46% = 11kg; ammonium bicarbonate per mu = 5 ÷ 17% = 30kg. 2. ...