Through field trials of three-stubble vegetable in one year

7 different kinds of fertilization modes(i.e.Applying none fertilizer

Chemical fertilizer applied as base manure

Chemical fertilizer applied half as base manure and half as additional one

Chemical fertilizer and dicyandiamide applied as base manure

Chemical fertilizer and dicyandiamide applied half as base manure and half as additional one

Applying chemical fertilizer and organic manure

Applying organic manure.) were conducted to tested the effects of using different kinds of fertilization modes on yield and nitrate's content of vegetable

and loss of nitrogen and phosphorus in vegetable field.Results showed that: Used two kinds of fertilization modes

such as "Applying chemical fertilizer and organic manure" and "Chemical fertilizer and dicyandiamide applied as base manure"

not only relatively higher output and lower nitrate's content of vegetable could be gained

but also the lost amount of nitrate-nitrogen

ammonia-nitrogen and water-solubility phosphorus

which were carried by ground runoff from vegetable field during the session of planting

was obviously reduced.Consequently

Non-point Source Pollution from Agriculture resulting from vegetable field was cut down.Therefore

those two kinds of fertilization modes are worth of being popularized on vegetable production in the future.