在灰潮土—芹菜系统中包膜尿素和尿素氮的利用和去向  

The Fate and Utilization of Nitrogen from Coated Urea and Urea in Calcareous Chao Soil—Celery System

作　　者：熊又升[1] 陈明亮[1] 何圆球[2] 巴瑞先[3] 余延丰[3] 乔艳[3] 

机构地区：[1]华中农业大学资源与环境学院,武汉430070 [2]中国科学院南京土壤研究所,南京210008 [3]湖北省农业科学院植保土肥研究所,武汉430064

出　　处：《华中农业大学学报》2004年第3期290-294,共5页Journal of Huazhong Agricultural University

基　　金：国家"十五"科技攻关项目 (2 0 0 1BA5 0 8B13 );中科院知识创新工程项目 (KZCX3 SW 417;KZCX2 413 )资助

摘　　要：通过盆栽试验研究了包膜尿素 (自制 )和尿素等肥料在灰潮土中对芹菜生长、氮吸收、产量和品质等的影响。结果表明 :在 2种质地的灰潮土中施包膜尿素较尿素使芹菜增产 11.5 %～ 15 .2 % ,N吸收增加 5 .9%～9.5 % ,土壤氨挥发损失N减少 12 .2 %～ 14 .4 % ,淋失和反硝化N损失减少 2 5 .5 %～ 2 8.3% ,N素利用率提高2 0 .1%～ 2 7.9% ,土壤持留N量占施氮量的 32 .0 %～ 37.3% ;芹菜产品中NO3 - N含量降低 4 4 .2 %～ 6 0 .3% ,维生素C含量显著提高 ,品质明显得到改善。Pot experiment was conducted in a glasshouse to investigate the effect of coated urea in calcareous Chao soil on uptake and balance of nitrogen (N), yield and quality of vegetable crops. Results indicated that 2 kinds of texture calcareous Chao soils applied by coated urea increased by 11.5～15.2% of first seasonal celery yield, N uptake by celery increased by 5.9%～9.5%, ammonia volatilization reduced by 14.2%～14.9%,N loss of leaching and denitrification reduced by 25.5%～28.3% and the utilization efficiency of N element increased by 20.1%～27.9% compared with urea. Soil remained N accounted for 32.0%～37.3% of N applied. Concentrations of NO 3 --N decreased by 44.2%～58.9%, vitamin C increased obviously in celery shoots and the product quality of celery was improved significantly.

关 键 词：包膜尿素 芹菜 氮素利用率 氮平衡 

分 类 号：S151.9[农业科学—土壤学] S636.2[农业科学—农业基础科学]