缓释尿素施用量对韭菜生长和土壤有效氮的影响  

Effect of Different Doses of Controlled-release-urea on the Growth of Chinese Chive and Soil Available Nitrogen

作　　者：卢威[1] 杨开静[1] 李东坡[2] 于立芝[1] 汤丽娟[1] 

机构地区：[1]中国农业大学烟台研究院,山东烟台264670 [2]中国科学院沈阳应用生态研究所,沈阳110016

出　　处：《中国农学通报》2012年第4期236-239,共4页Chinese Agricultural Science Bulletin

基　　金：中国农业大学烟台研究院资助项目"缓释尿素在果树;蔬菜上应用效果研究"(YT200722)

摘　　要：采用盆栽试验,研究了缓释尿素的不同施用量对韭菜生长、产量、效益及对土壤有效氮含量的影响。试验结果表明:施用缓释尿素能明显促进韭菜的生长发育,但过量的施用缓释尿素对韭菜的生长有抑制作用,表现为株高、茎粗和叶宽等指标明显的降低;韭菜的产量和经济效益在处理4(T4)达到最高,分别为65573.85kg/hm2和131147.7元/hm2,以后均逐渐下降,各处理之间差异极显著;缓释尿素施用量增加,土壤有效氮的含量逐渐增加,二者成正相关,相关系数为0.9869。过量的施用缓释尿素会降低韭菜的产量和效益,盆栽韭菜每次最适宜的缓释尿素施用量应为450kg/hm2,缓释尿素能有效增加土壤有效氮的含量。The effect of different doses of controlled-release-urea on the growth, yield and economic benefit of Chinese chive and soil available nitrogen was researched by cultivating it in basins. The results showed that appropriately use of controlled-release-urea could promote the growth of Chinese chive significantly, but the excessive doses of controlled-release-urea would inhibit it, which obviously lowered plant height, stem diameter and leaf width. There was a significant difference among the groups and group4 （T4） obtained the highest yield and economic benefit, were 65573.85 kg/hm^2 and 131147.7 yuan/hm^2, then those of other groups decreased gradually. Soil available nitrogen and the doses of controlled-release-urea were positively related, and the correlation coefficient was 0.9869. Excessive application of controlled-release-urea would reduce the yield and economic benefit, the optimum dose of controlled-release-urea for Chinese chive should be 450 kg/hm^2 every time. The use of controlled-release-urea can effectively increase the soil available nitrogen.

关 键 词：缓释尿素 韭菜 生长 土壤有效氮 

分 类 号：S143.1[农业科学—肥料学]