控释肥料氮素释放规律及叶菜类蔬菜生长效应研究

通过盆栽试验和大田试验研究了自研控释肥的氮素释放动态及对叶菜类蔬菜品质和产量的影响。结果表明,BCRF处理土壤铵态氮含量明显高于其它施肥处理,硝态氮含量在菜心生长前期显著低于BVSF处理,后期又明显低于SVSF处理。BCRF处理的氮素供应能满足菜心等广东的主要叶菜类蔬菜全生长期的营养需求,而且蔬菜产品的维生素C含量和可溶糖含量明显升高,硝酸盐含量显著降低,有利于改善蔬菜品质,同时,具有稳定的增产效果。

Study on the nitrogen release dynamics of controlled-release fertilizer and its effects on quality and yield of leafy vegetables

A pot experiment and field trials were conducted to study on nitrogen release dynamics of a controlled-release fertilizer and its effects on quality and yield of leafy vegetables. It was observed that BCRF treatment resulted in significant higher soil NH4-N content than other treatments during whole growth period of flowering Chinese cabbage (FCC). On the other hand, soil NO3-N content of BCRF was evidently lower than that of BVSF in early and medium growth stages, and also lower than that of SVSF in late stage. In addition to meeting the demand for nitrogen nutrition of major leafy vegetables such as FCC in Guangdong, BCRF stably increased commercial yields and improved vegetable quality through increasing concentrations of vitamin C and soluble sugar, meanwhile decreasing concentration of nitrate in the products.