Abstract: The balance of input and output phosphorus and dynamic accumulating in vegetable field were studied.The yield response of Chinese cabbage and capsicum to phosphate fertilizer and soil residual phosphorus was also investi2gated by determining soil sample in two2year experiment field and over five2year green house. The aimof paper was to ex2plore the yield response to available P(Olsen2P)in soil in order to recommend phosphate fertilizer application. The mainresults showed that the yield response equation of Chinese cabbage and capsicum to phosphate fertilizer and Olsen2P ac2corded with the quadratic. The rate of balance of input and output P was 3317 % - 68014 %,and the accumulated Olsen2P accounted for 1717 % - 2819 % of total residual P in the soil.Olsen2P in 0 - 20 cm green house soil increased 2311 -3212 mg/kg each year and 20 - 100 cm soil increased gradually with the time of phosphate fertilizer application. The rateof balance of input and output P in 0 - 20 cm soil in green house was 12411 % - 29316 %. The accumulated available P(Olsen2P)accounted for 1616 % - 2412 % of total residual P in the green house soil. The yield response of vegetable toOlsen2P accorded with the quadratic. There existed positive linear relation between residual phosphorus in soil and in2creased Olsen2P. The accumulated Olsen2P accounted for 1717 % - 2819 % of total residual P in the soil. The phosphateapplication rate should be calculated according with the background amount of soil Olsen2P and the balance of input andoutput phosphorus.

Key words: Phosphorus balance, The capacity of soil phosphorus supply, Soil phosphorus accumulation, Y ield response

CLC Number: 

• S153.6