有机肥与无机肥配合施用对蔬菜作物N肥流向的影响

Effects of supplying organic fertilizer in combination with inorganic one on distribution of nitrogen in vegetable crops.

通过^(15)N标记示踪试验,研究了常规施肥和不同种植方式露地栽培黄瓜、番茄、花椰菜、大白菜、菜豆的N肥利用率及其流向,有机肥与无机肥配合施用对N肥流向的影响。结果表明,5种蔬菜露地栽培N肥利用率平均为28.63％,土壤N素残留率为39.07％,N素亏损率41.25％。有机肥与无机肥配合施用,当年蔬菜作物无机N肥吸收减少,但土壤N素残留率增加,N素亏损率下降。

By 15N-labeled trace trials,nitrogen utilization ratio of cucumber,tomato,cauliflow-er, Chinese cabbage and kindy bean cultivated outdoor under the condition of normal fertiliza-tion and different planting pattern, the distribution of nitrogen, and effects of supplying organic fertilizer in combination with inoraganic one are analyzed. The results show that the ni-trogen utilization ratio, nitrogen residue in soil, and nitrogen losts of five vegetables are 28.63% ,39.07% and 41.25%,respectively. Through supplying organic fertilizer in combina-tion with inorganic one, the crop absorption of inorganic nitrogen decreases in the first year, but nitrogen residue in soil increases.