腐植酸制剂防治棚菜硝酸盐污染技术研究

对温室大棚蔬菜的硝酸盐含量进行了调查,结果发现部分蔬菜中硝酸盐含量有超标现象,文章分析了造成蔬菜硝酸盐污染主要因素;并通过引入两种制剂(HA)进行田间试验。结果表明,防治型制剂和防治营养型制剂对降低芹菜、小白菜中硝酸盐含量均达到极显著水平,下降幅度38.99%～68.81%;在此基础上摸索出两条利用腐植酸综合技术防治棚菜硝酸盐污染的应用模式。

Humic acid control technique in nitrate pollution of vegetable in shed

Nitrate content of part of vegetables in greenhouse exceed the standard,the article investigated and analyzed the key factors which produce nitrate pollution of vegetable.Through introducing two humic acid preparations,we made field experiments.The results showed that controlled type and controlled nutritional type can drop nitrate content of celery and small cabbage to polar level of significance which can down to 38.99%-68.81%.Fertilizer disposal get level of significance.There is great difference between controlled type,controlled nutritional type and fertilizer disposal.On the base of results,we found two application models of integrated control technique of humic acid to control nitrate pollution of vegetable in sheds.