氮肥的不同用量对大白菜产量的影响

Effects of Different Amount Nitrogen Fertilizer on the Yield of Chinese Cabbage

通过大白菜2+X氮肥总量控制试验,研究不同氮肥施用量对大白菜产量和经济效益的影响。田间试验结果表明:处理1(N_0P_0K_0)的产量最低,为3201 kg/667m^2;处理4(N_2P_2K_2)的产量最高,为5621 kg/667m^2,各处理的产量排序依次为处理4(N_2P_2K_2)>处理3(N_1_P2K_2)>处理2(N_0P_2K_2)>处理5(N3P2K2)>处理1(N_0P_0K_0),说明在磷钾肥用量一致的基础上,氮肥施用量在20 kg/667m^2这个范围内,大白菜的产量随着氮肥施用量的增加而增加,但在超过20 kg/667m^2的施用量后产量不仅没有提高,反而呈现下降的趋势。

By the total amount of nitrogen controlled trial（ 2 ＋ X） to study the effects of nitrogen fertilizer rates on the yield and economic benefit of Chinese cabbage.Field test results showed that： treatment 1（ N0P0K0） have the lowest yield to 3201 kg/667m^2;treatment 4（ N2P2K2） have the highest yield to 5621 kg/667m^2,yield the sort of each treatment were treated 4 〉 treatment 3 〉 treatment 2 〉 treatment 5 〉 treatment 1,indicating a consistent amount of P and K on the basis of the amount of nitrogen fertilizer in 20 kg /667m^2 of this range,the yield of cabbage with increasing nitrogen fertilizer increases,but after the administration of more than 20 kg /667m^2,production show a downward trend in contrast.