Effects of Nitrogen Fertilization Amount on the Prophase Yield of Phaseolus vulgaris and Available Nitrogen Content of Soil

氮肥施用量对菜豆产量和土壤有效氮的影响（英文）

[Objective] This study aimed to provide certain scientific basis for reasonable application of nitrogen fertilizer in the pollution-free cultivation of Phaseolus vulgaris. [Method] A field experiment was conducted to investigate the effects of different nitrogen fertilization amounts on the prophase yield and economic efficiency of P. vulgaris and available nitrogen content of soil. [Result] With the increased application amount of nitrogen fertilizer, the prophase yield and economic efficiency of P. vulgaris reached the peaks in the Treatment 3 （8 690.48 kg/ hm^2 and 32 222 yuan/hm^2）, and significant differences were found among different treatment groups. With the increased nitrogen fertilization amount, the soil available nitrogen content increased, showing a positive correlation with correlation coefficient of 0.856 5. Excess nitrogen fertilizer reduced the prophase yield and economic efficiency of P. vulgaris. For the open field cultivation of P. vulgaris, the optimum application amount of nitrogen fertilizer was 178 kg/hm^2. [Conclusion] Application of nitrogen fertilizer could effectively increase the soil available nitrogen content.

[目的]为菜豆无公害栽培中氮肥的合理施用提供科学依据。[方法]通过田间试验,研究了不同氮的施用量对菜豆前期产量、经济效益以及土壤有效氮的影响。[结果]随着氮肥施用量的增加,菜豆的前期产量和经济效益在处理3达到最高,分别为8 690.4 kg/hm^2,产值为32 222元/hm^2,各处理间差异显著。氮的施用量增加土壤有效氮的含量增加,二者呈正相关,相关系数为0.856 5。过量的施用氮肥会降低菜豆的前期产量和效益,菜豆露地栽培的最适宜施氮量是178 kg/hm^2。[结论 ]施用氮肥能有效地增加土壤有效氮的含量。