生姜的营养特性及钾对生姜产量和土壤肥力的影响

摘要

Field experiment was conducted to study ginger (Zingiber officinale Rosc.) nutrient characteristics, yield and soil fertility by different K fertilizer levels.The results showed that ginger nutrient absorption amount was firstly for K.Ginger must absorb N 6.1 kg, P2O5 2.36 kg and K2O 9.4 kg from soil, if its root-stem yield was 1 000 kg.The yield for K3 treatment was the highest, but there was no significant difference in yields between K2 treatment and K3 treatment.We could obtain by linear equation of yield and fertilization that K fertilization for the highest yield was 900 kg · hm-2.Considering the effects of different K levels on nutrient absorption and soil fertility, the optimal fertilizer rate was K2O 750-900 kg · hm-2, the optimal N and K2O proportion was 4∶ 5-4∶ 6.%以安丘生姜为试材,研究了生姜不同生长期的养分吸收特性,以及不同钾水平对生姜产量和土壤肥力的影响.结果表明:姜对钾素的需求最多,每生产1 000 kg姜需要从土壤中吸收6.1 kg N、2.36 kgPO、9.4 kg KO.K3处理[KO 70 kg·(667 m)]的生姜产量最高,但与K2处理[KO 50 kg·(667m)]之间差异不显著.通过产量和施肥量的拟合曲线获得最高产量的钾肥施用量为60 kg·(667 m),综合考虑不同钾水平对生姜养分吸收和土壤肥力的影响,得出本试验条件下生姜周年生产的钾肥(KO)投入量为667 m50～60 kg比较适宜,同时适宜的氮钾比例为4:5～4:6.