Effects of Located Fertilization on Yield and Quality of Cabbage in Acid Purple Soil

Field plot experiments were conducted for four years(2003-2006)to study the effects of located fertilization on yield,quality and economic benefit of cabbage.The results showed that the effects of various fertilization treatments differed with years,especially the effect on cabbage quality.On the average for the four years,fertilizer application increased cabbage yield by 6.7%~37.4% compared with the no-fertilizer CK.The highest yield was obtained in the treatment N30 P15K20Ca150,followed by the treatments N30P15K20B0.2 and N30P15K20.Compared with OPT(N30P15K20),additional application of P and K decreased the yield by 1.5%,and additional application of Ca or B increased the yield by 9.6% or 3.8%,respectively.The contents of amino acid,crude protein,Vc and reductive sugar increased in different fertilizer combinations and the nutrition quality of cabbage was significantly improved in comparison with CK.Compared with OPT,additional application of P and K enhanced the content of amino acid and Vc of cabbage,additional application of calcium fertilizer increased the contents of amino acid,crude protein and Vc,the percentage increase in amino acid being 10%,while additional application of B increased the contents of amino acid,Vc and reductive sugar.Of all the treatments designed,OPT gave the best result of decreasing the content of nitrate of cabbage.Taking all aspects into account,N30 P15K20Ca150 was the best nutrient combination for good-quality cabbage with high yield.