施氮对小白菜产量和品质的效应  

Influence and assessment of nitrogen rates on nitrate content and nutrient quality of Chinese cabbage (B. Chinensis L.)

作　　者：李会合[1] 王正银[2] 

机构地区：[1]重庆文理学院生命科学系,重庆永川402168 [2]西南农业大学资源环境学院,重庆北碚400716

出　　处：《中国土壤与肥料》2007年第4期53-55,共3页Soil and Fertilizer Sciences in China

基　　金：重庆市科委攻关项目(2000-6208)的部分内容

摘　　要：田间试验研究了施氮对两种肥力土壤小白菜产量、硝酸盐含量和营养品质的影响。结果表明,施氮量与小白菜产量呈显著（低肥力）和极显著（中肥力）的二次回归关系,中、低肥力土壤施氮小白菜分别增产141.2%-309.4%和149.5%-617.6%;低肥力土壤小白菜产量仅为中肥力土壤的28.6%-49.5%。施氮75-300kg·hm^-2提高小白菜硝酸盐含量9.9%-33.3%（中肥力,75 kg·hm^-2处理除外）和240.3%-363.6%（低肥力）,硝酸盐含量以中肥力土壤〉低肥力土壤（N 150 kg·hm^-2处理除外）。施氮降低中肥力土壤小白菜Vc含量、提高氨基酸含量,对可溶性糖影响不大;低肥力土壤施氮降低小白菜Vc、氨基酸、可溶性糖含量。Field experiments on two soil fertility conditions were carded out to study the influence of nitrogen rotes on nitrate content and nutrient quality of Chinese cabbage. The results showed that a significant quadratic regression existed between nitrogen rates and yield of Chinese cabbage on two soil fertility conditions. The yield of Chinese eabbage on medium and low soil fertility was increased by 141.2% - 309.4%and 149.5% - 617.6%, respectively. On low soil fertility the yield of Chinese cabbage was only 28.6% - 49.5% of thin on medium soil fertility. The nitrate content was increased by 9.9% - 33.3% （on medium soil fertility, except N 75 kg·hm^-2 treatment） and 240.3% - 363.6% （on low soil fertility） respectively by applying nitrogen （N） 75 - 300 kg·hm^-2. In the same treatment , nitrate content of Chinese cabbage was higher on medium soil fertility than on low soil fertility except （N） 150 kg·hm^-2 trealment. On medium soil fertility Ve content in Chinese cabbage was decreased, the content of amino acid was increased and the content of soluble sugar was affected little with applying nitrogen （N） fertlizer. But the content of Ve, soluble sugnr and amino acid was decreased on low soil fertility.

关 键 词：氮肥 土壤肥力 小白菜 硝酸盐 营养品质 

分 类 号：S634.3[农业科学—蔬菜学]