不同磷钾肥配比对大棚蔬菜养分吸收、产量及品质的影响

Effects of Chemical Potash and Phosphorus Fertilizer Input on Yield,Nutrient Uptake and Fruit Quality of Vegetables Cultivated in Plastic Greenhouse

在大棚栽培条件下,采用田间小区试验方法研究了不同磷钾配比对2季蔬菜黄瓜和番茄养分吸收、产量及品质的影响。结果表明,当磷钾施用量分别为P2O5180 kg/hm2和K2O 180 kg/hm2(黄瓜);P2O5120 kg/hm2和K2O 180 kg/hm2(番茄)时,黄瓜和番茄的果实品质较好,地上部生物量(干重)、养分吸收量及产量均最高。

Field experiments were carried out to study the effects of various combination of chemical potash and phosphorus fertilizer input on the yield, nutrient uptake and fruit quality of vegetables cultivated in plastic greenhouse in Yixing, Jiangsu Province. Under this experiment condition, to achieve better fruit quality, highest dry weights of aerial parts, nutrient contents and best fruit yields, the optimum P2 05/K20 input combinations for cucumber and tomato were 180/180 （kg/hm2） and 120/180 （kg/hm2）, respectively. Results indicated excessive chemical phosphorus input not only led to a waste of the fertilizer, but increased potential environment risk.