【摘要】 在玉米—玉米—大豆的轮作周期中,施等NPK养分的条件下,连续20年施用氯磷铵钾(双氯)复混肥的长期定位试验结果表明:施用氯磷铵钾复混肥对玉米的肥效与尿素+普钙+KCl(单氯),尿素磷铵钾(无氯)处理基本相当;对大豆作物,比尿素+普钙+KCl、尿素磷铵钾处理产量分别降低了12.8 kg/667m2和10.4kg/667m2,均达到了5%显著水准;施氯磷铵钾处理比施尿素磷铵钾处理的玉米、大豆籽粒纯蛋白质含量分别降低了8.0 g/kg和19.2 g/kg。对玉米淀粉和大豆脂肪含量无不良影响。连续20年施用氯磷铵钾复混肥处理在0~60 cm土层中氯的积累量为19.1 kg/667m2,0~20 cm土层中最高含氯量为75.0 mg/kg土,未达到玉米、大豆作物耐氯临界值。pH值由6.37下降到4.80,土壤出现明显的酸化现象。施氯磷铵钾复混肥处理土壤交换性钙、镁和盐基饱和度有明显降低。更多还原

【Abstract】 The experiment is carried out continuingly for 20 years by corn-corn-soybean rotation practice,under equal NPK condition with long term application of cholo-ammoniopotassium phosphate compound fertilizer.The result indicates that this compound fertilizer has similar effect with either urea+ calsium superphophate+KCl or urea ammonium phosphate compound treatments on corn but comparatively less effctive on soybean which caused soybean yield reduced by 12.8 kg/667m2 and 10.4 kg/667m2,respectively,either statistically reaching 5% remarkable level;compared with urea ammonium phosphate treatment,pure protein content reduction is found both in corn and soybean grain by 8.0 g/kg and 19.2 g/kg under cholo-ammoniopotassium phosphate compound treatment but no starch or fat content reduction in corn or soybean is found during the experiment.After 20years long term experiment the cholorine accumulated in 0～60 cm soil surface has reached 19.1g/667m2,and highest cholorine content in 0～20 cm soil surface is 75.0 mg/kg which still below corn and soybean cholorine tolerance rate,the soil has obvious aciditation with pH shifts from 6.37 to 4.80;it is also found that significant reduction of exchangeable calcium,magnesium and saline base saturation percentage in the soil but tremendous improvement of instant phosphate,potassium content.更多还原