Effects of Biological Phosphorus Fertilizer on Pakchoi Growth and Quality and Soil Nutrient Status
CAO Cui-ling1，YAN Hui2，WANG Zhen1，SHAO Yang1
1 College of Life Sciences，Northwest A & F University，Yangling 712100，Shaanxi，China；2 Tianjin Tasly TCM Science
and Technology Development Co. LTD.，Tianjing 300400，China
Pot experiment was carried out to study the effect of phosphate-solublizing fertizer（PSF）on
pakchoi〔Brassica campestris L. ssp. chinensis（L.）Makino var. communis Tsen et Lee〕growth and quality，
and soil physicochemical properties．The results showed that after applying PSF，the total bacteria number
in soil was increased，among them the total number of phosphate-solubilizing bacteria was increased with the
increase of PSF applying amount．When the amount of PSF was 45 g·pot-1，the number of phosphate-solublizing
bacteria could reach 2.05×106 cfu·g-1．At the same time，the soil pH value decreased remarkably．With PSFapplication rate increase，the phosphate accumulation in pakchoi aboveground plant were increased remarkably
121.06%，226.43% and 302.09% more than the corresponding contrasts，respectively．The fresh and dry
weight of pakchoi were increased significantly，by 40.19%，52.71% and 33.56% more than the corresponding
contrasts，respectively．While the root shoot ratio reduced significantly．Among them，the root shoot ratio was
0.013，the lowest when PSF application rate was 45 g·pot-1．When the amount of PSF application was 45 g·pot-1，
the contents of VC，soluble sugar，soluble protein，and free amino acid were higher than that of the contrast
by 29.97%，39.94%，30.86%，17.36%，respectively．But the nitrate content in leaf blades was reduced to
21.83%．Therefore，the application of PSF formentated with bran could promote the utilization of insoluble
phosphorus in soil，and improve the yield and quality of pakchoic．
