期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

2001

27

5

355-358

10.3321/j.issn:1007-1032.2001.05.008

湖南省教育厅资助项目 （湘教科字 [1994 ]84号 - 14 ）；

本校为第一机构

通过小白菜盆栽试验,研究了3种氯化铵用量(即每千克土壤分别施用0.25,0.50,0.75 g氯化铵)对小白菜产量、可溶性糖和硝酸盐含量以及土壤理化性质的影响.结果表明,合理施用氯化铵,小白菜产量增加,可溶性糖含量上升,且小白菜体内硝酸盐含量随氯化铵用量增加而降低.试验中所有处理的小白菜鲜样的硝酸盐(NO3-)含量均在432 mg/kg以下,符合食用硝酸盐控制标准.氯化铵的最高施用量以375 kg/hm2左右为宜.随着氯化铵用量的增加,土壤中氯离子残留量增加,氯离子含量不超过300 mg/kg时,小白菜能正常生长,过量施用氯化铵可导致小白菜氯中毒.施用氯化铵后土壤pH值下降0.48～1.09,且土壤pH值下降幅度有随氯化铵用...

The pot experiments on quaternary period red soil and alluvial soil were conducted to study the effects of application rates of ammonium chloride on the yield and quality of chinese cabbage pak choi and soil properties.The results show that the yield and the contents of soluble sugar in chinese cabbage pak choi remarkably increase with the appropriate application of ammonium chloride, but the nitrate contents decrease with the increase of ammonium chloride.The suitable rate is 375 kg/hm 2.The Cl - accumulates in soil and pH descends by 0.48~1.0...