试验研究长期定位施氮条件下蔬菜对氮素的吸收及利用的研究  

Studies on Absorption and Utilization of Nitrogen under Experiment of Long-term and Fixed Position Nitrogen Application in Vegetable Field

作　　者：葛晓光[1] 王晓雪[1] 刘秀茹[1] 付亚文[1] 

机构地区：[1]沈阳农业大学蔬菜科学系

出　　处：《中国蔬菜》1998年第5期1-5,共5页China Vegetables

摘　　要：在氮肥长期定位施用的试验条件下研究了几种蔬菜在不同施氮水平下的氮素吸收量、产品器官内Ｎ素浓度及氮素利用效率的变化。结果表明，蔬菜吸Ｎ量在种类之间的差异可达４．５～４．８倍，雪里蕻、大白菜等叶菜不仅平均Ｎ素浓度较高，且对施肥量增加反应敏感；产品器官的含Ｎ量与ＮＯ－３含量存在极显著的相关关系；不同蔬菜的氮素利用效率差异明显，大白菜、黄瓜对增施有机肥及无机Ｎ肥均较敏感；甜椒、雪里蕻及马铃薯等对增施无机Ｎ肥敏感或比较敏感。Amount of N absorption,N concentrition of product organ and efficiency of N utilization of several vegetables in different treatments of N application under experiment of Long-term and fixed position nitrogen application were investigated. Results showed that there were significant differences in the amount of N absorption among various vegetables. Leaf mustard and head Chinese cabbage had higher average N concentrition and were sensitive to fertilizer amount. There was a significant correlation between content of NO_3^- and total N in product organ. Some vegetables (sweet pepper,leaf mustard and potato) were sensitive to increacing application of inorganic N fertilizer,the others (head Chinese cabbage,cucumber) were sensitive to organic fertilizer as well inorganic N fertilizer.

关 键 词：长期定位 施肥条件 蔬菜 氮素 吸收 利用 

分 类 号：S630.62[农业科学—蔬菜学]