作　　者： ; ; ; (吴良欢）;

机构地区： 华南农业大学资源环境学院

出　　处： 《水土保持学报》 2013年第6期26-30,共5页

摘　　要： 采用室外盆栽种植菜心（Brassicaparachinensis），研究硝化抑制剂2-氯-6（三氯甲基）吡啶（Nitra—pyrin）对红壤菜地土壤氮素转化、径流流失、菜心生长及品质的影响。结果表明，与UR（普通尿素）处理相比，CP（含Nitrapyrin“碧晶”尿素）处理地表径流铵态氮、硝态氮和无机氮流失量分别降低13．1％，12．9％和11．7％；CP处理菜心干重显著增加410．6％，硝酸盐含量显著降低46．4％，可溶性糖含量显著增加88．8%；CP处理土壤铵态氮含量增加1．7％～1172．4％，硝态氮和亚硝态氮含量分别降低12．7％～52．1％和O～6．5％。硝化抑制剂Nitrapyrin能减少地表径流中氮素流失，同时提高菜心产量，改善菜心品质。 A pot experiment was carried out in outdoor to investigate the effects of nitrification inhibitor 2- chloro -6 （three chloro methyl pyridine） （Nitrapyrin） on nitrogen transformation, nitrogen loss, the growth and quality of Brassica parachinensis in red vegetable soil. Results showed that compared with the treatment of UR （urea）, the treatment of CP （＂Bijing＂ urea with nitrification inhibitor Nitrapyrin） could reduce the content of ammonium nitrogen, nitrate nitrogen and inorganic nitrogen in surface runoff by 13.1 %, 12.9% and 11.7%, respectively. Compared with the treatment of UR, the dry weight of Brassica parachinensis of the treatment CP significantly increased by 410.6%, the content of nitrate significantly reduced by 46.4~, and the content of soluble sugar significantly increased by 88.8%, respectively. Compared with the treat ment of UR, the treatment of CP could increase the ammonium nitrogen concentration in soil by 1. 7% 1 172.4%, but reduce the concentration of nitrate nitrogen and nitrite nitrogen in soil by 12.7% ~52.1% and 0~6.5%, respectively. Nitrification inhibitor nitrapyrin could reduce the loss of nitrogen in surface run- off, increase output and improye the quality of Brassica parachinensis at the same time.

关 键 词： 硝化抑制剂 菜地 氮素 菜心

领　　域： [农业科学] [农业科学] [环境科学与工程]