不同追肥处理对大棚酸性土壤养分含量及树仔菜生长的影响

以大棚树仔菜为试材,分别施用复合肥和酸性土壤改良营养液追肥,比较分析2种不同追肥处理对树仔菜嫩梢产品农艺性状、品质、产量和土壤有效养分含量的影响,为改善大棚酸性土壤环境、树仔菜化肥减施增效等提供理论依据。结果表明,酸性土壤改良营养液追肥处理的试验区土壤pH值提高了0.69个单位;试验区土壤有效磷含量变化趋势与对照区的差异显著,而有机质、有效磷、速效氮和速效钾含量变化趋势与对照区的差异不显著;酸性土壤改良营养液追肥处理的树仔菜嫩梢样品可食部分节杆长度、直径显著高于对照区,叶片数和分枝数显著低于对照区,单株质量差异不显著;同年6-12月试验区树仔菜产品总产量比对照区提高了6.90%,样品中蛋白质和维生素C含量比对照区分别提高了19.7%、31.2%,镉含量比对照区的降低了25.9%。

Effect of different fertilization treatment on the growth,yield and quality of Sauropus androgynus and the content of available nutrient in greenhouse acid soil

In order to improve the acidic soil environment of the greenhouse and provide the theoretical basis for reducing fertilizer application and increasing effect of Sauropus androgynus,the Sauropus androgynus was used as material in this study,the compound fertilizer and acid soil improved nutrient solution were applied,the effects of the two different treatments on the agronomic characters,quality and yield of young shoots and soil available nutrient content were investigated.The results showed that application of acid soil improved nutrient solution could increase the soil pH by 0.69,the soil available phosphorus was significantly improved compared with control,while the soil organic matter,available nitrogen and potassium were found no significant difference compared with control.After treated by the acid soil improved nutrient solution,the length and diameter of the young shoots were significantly higher than those of the control,the number of leaves and branches were significantly lower than those of the control,while but there were no significant differences with the single plant weight between the treatment and control.After treated by the acid soil improved nutrient solution,the Sauropus androgynus yield in treated plot was 6.90%higher than that of the control,the contents of protein and vitamin C in Sauropus androgynus were increased by 19.7%,31.2%respectively compared with control,the Cd content of Sauropus androgynus sample in the treated plot was 25.9%lower than that of the control plot.