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作 者:任广涛[1] 梁洪涛[1] 金荣荣[1] 张海霞[1] 栾国红[1]
机构地区:[1]哈尔滨市农业科学院,黑龙江哈尔滨150070
出 处:《北方园艺》2009年第1期17-19,共3页Northern Horticulture
摘 要:以叶用莴苣为试材,采用深液静止水培技术,在营养液中用不同比例的酰胺态氮替代部分全氮,分析其对水培叶用莴苣的生长发育、硝酸盐污染、产量及品质的影响。结果表明:酰胺态氮占全氮15%处理最大叶面积、叶片数高于对照及其它处理,产量最高,达到14.50 kg/m2。随营养液中酰胺态氮浓度的增加,水培叶用莴苣体内硝酸盐的含量有降低的趋势。尿素占全氮5%处理的硝酸盐含量最高,达到1 471.28 mg/kg,尿素占全氮75%处理最低,硝酸盐含量只有608.02 mg/kg。尿素占全氮30%处理的维生素C含量最高。In order to controlling nitrate of vegetable with the siolless culture, this text use the lettuce for material, adopt the deep static hydroponics technique, add Amide nitrogen treatment of different densities to growth-promoting media, analyzed the effect on the growth and development, nitrate pollution, yield, and quality with hydroponics lettuce. The result indicated: The 15% treatment's largest leaf and the number of leaf was higher than other treatment and contrast remarkable. The yield was up to 14.50 kg·m^-2. with the increment the density of Amide nitrogen, the content of nitrate present rdg tendency. The content of nitrate was the highest which up to 1 471.28 mg·kg^-1. When the proportion of amide nitrogen was 75% ,the content of nitrate was only 608.02 mg/kg which was the lowest. The content of Vc was the highest when the proportion of amide nitrogen was 30 %.
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