PBP对土壤硝化作用的影响及对小白菜增产效应的研究

Influence of Polyphenols of Banana Pseudostem (PBP) on Soil Nitrification and Biomass of Pakchoi

采用盆栽试验方法研究了香蕉假茎汁液提取物—PBP对土壤硝化作用及对小白菜产量的影响。结果表明,PBP系列物质能抑制铵态氮在土壤中的转化,减缓土壤铵态氮的转化速率和土壤硝态氮的生成量、生成速率。同时,PBP系列物质对盆栽小白菜有显著或极显著的增产效果。

We tested benefits of polyphenols of banana pseudostem on soil nitrification and biomass of pakchoi using a pot experiment. The results showed that a series of PBP extracted from banana pseudostem were capable of inhibiting transformation of - N, into - N. Compared with the control test, receiving N fertilizer two times higher than other treatments, at the 21st day, the contents of - N in other treatments were almost as same as the treatment, excluding the treatment of PBP4. At the 49th day, the treatments of PBP1- 3 could reduce the transformation of - N by 11.9% ～ 33.7% in the soil. Compared with other ordinary nitrogen- inhibitors, the treatments of PBP1- 3 could postpone seven days of forming perk for - N in the studied soil, and furthermore, PBP4 could also shortly retard the soil nitrification before the 7th day. In the meantime, compared with the treatments of CK and the treatment with another nitrogen- inhibitor DCD, the series of PBP used in the present study could significantly increase the biomass of pot- planted pakchoi.