【摘要】 １９８７年至１９９２年的含氯化肥长期定位试验表明，在蒸发、降雨量接近的江苏苏南地区，氯化铵的增产效果及其氮素利用率均好于尿素，施用氯化铵的稻、麦及油菜种子的粗蛋白和氨基酸含量也较高；增加氯化铵施用次数可显著提高氮素利用率，并改善作物品质；氯化铵用量增加，土壤氯的积累也相应增加，同时随种植时间延续，也未发现氯离子在土壤耕层及１ｍ土层积累。但必须注意连续施用含氯化肥有使土壤酸化的趋势。更多还原

【Abstract】 A long-term fixed position experiment was carried out from 1987 to 1992 tostudy the efficiency of chloride-bearing fertilizer applied in farmland.The resultsshow(1) in south Jiangsu where the evaporation and rainfall are close,to applyammonium chloride was better than to apply urea in increasing crop yields,utilization rate of nitrogen,and the crude protein and amino acid contents of rice,wheat and rape; (2 )increaseing times of applying ammonium chloride could nota- bly raise the utilization rate of nitrogen and improve the quality of crop seeds.(3)the accumulation of Cl￣-in the soil increased with the amount of ammonium chlo-ride applied, but the accumulation and leaching of Cl￣-in the soil went to equli-brium as the test continued and no accumulation of Cl￣-in the plough and one-metersoil layer was discovered;and(4)the continuous application of chloride-bearingfertilizer could quicken soil acidfication.更多还原