大蒜养分需求规律及施肥模型初探

The research of garlic's nutrient requirements and fertilization model

针对大蒜施肥中存在的习惯性和盲目性,采用肥料"3414"试验,在中壤土上进行了大蒜养分需求规律及施肥模型试验研究。结果表明,大蒜在生长过程中,吸氮最多、钾次之、磷最少,吸收氮磷钾的比例为N∶P2O5∶K2O=1∶0.36∶0.70,氮、钾吸收高峰在鳞茎膨大期,磷吸收高峰在蒜苔伸长期。大蒜施用氮磷钾,均有增产效果,氮磷钾最佳施用量为N436.95kg/hm2,P2O5213.34kg/hm2,K2O336.74kg/hm2。氮肥施用方法以2/3基+1/3追为宜,钾肥以2/3基+1/3追效果最好。

According to the habituation and blindness in garlic fertilization,the study which in medium loam was made on fertilization model and the regularity of garlic nutrient requirement,using fertilizer ＂3414＂test.The results show that：during the growth of jlnxiang garlic,the most absorption is nitrogen,the following absorption is potassium,the least absorption is phosphorus,the absorption of NPK ratio is N：P2O5：K2O=1：0.36：0.70,nitrogen and potassium absorption peaks in bulb swelling stage,phosphorus absorption peak in garlic sprout elongation stage.The application of NPK on garlic has the effect on increasing yield and the optimum application amount of nitrogen phosphorus and potassium are N 436.95kg/hm2,P205213.34kg/hm2,K20336.74kg/hm2.Nitrogen fertilization application method to 2/3 base fertilizer and 1/3 topdressing is appropriate,potash application methods to 2/3 base fertilizer and 1/3 topdressing is the best.