水溶肥种植模式下不同氮素含量处理对土壤养分、黄瓜品质及氮肥利用效率的影响

Effects of Different Nitrogen Content Treatment on Soil Nutrients, Cucumber Quality and Nitrogen Use Efficiency under Water-soluble Fertilizer Planting Mode

为研究水溶肥种植黄瓜最适养分投入量,聚天门冬氨酸与不同处理对土壤及黄瓜氮肥利用效率的影响,利用水肥一体化种植模式,设施5个处理,CK不施加氮素,T1、T2、T3、T4处理均使用黄瓜专用水溶肥,T1、T2、T3、T4总氮含量分别为525、420、336、268 kg·hm^(-2),测定土壤养分、黄瓜品质及氮肥利用效率的变化。结果显示:采用水肥一体化种植,土壤养分有明显提高,T3处理的pH与CK相比提高了9.36%,碱解氮和有机质含量增加。黄瓜品质改善,亚硝酸盐含量与CK相比降低了6.54%,T3处理较T1氮肥利用效率提高近2倍。因此,农业生产中适当减少氮素的施加可以有效提高肥料利用率。

In order to study the optimal nutrient input of cucumber planted with water-soluble fertilizer,the effect of polyaspartic acid and different treatments on soil and cucumber nitrogen use efficiency,the use of water and fertilizer integrated planting mode,5 treatments of facilities,CK did not apply nitrogen,T1,T2,T3,and T4 treatment used cucumber-specific water-soluble fertilizer,T1,T2,T3 and T4 total nitrogen content was 525 kg·hm^(-2),420 kg·hm^(-2),336 kg·hm^(-2),268 kg·hm^(-2),respectively,to determine the changes in soil nutrients,cucumber quality and nitrogen used efficiency.The results showed that the soil nutrients were significantly improved by the integrated planting of water and fertilizer,and the pH of the T3 treatment was increased by 9.36%compared with CK,and the content of alkaline hydrolysis nitrogen and organic matter increased.The quality of cucumber was improved,the nitrite content was reduced by 6.54%compared with CK,and the T3 treatment was nearly twice as efficient as that of T1 nitrogen fertilizer.So the appropriate reduction of nitrogen application in agricultural production can effectively improve fertilizer utilization.