缓释尿素用量对烟台地黄瓜幼苗生长的影响
2016-05-14张文齐李明晶姜新于立芝
张文齐 李明晶 姜新 于立芝



摘 要:采用营养钵育苗方法,设置100、150、200、250、300 g/m35个缓释尿素用量水平,研究其对烟台地黄瓜幼苗生长的影响。结果表明:适宜的缓释尿素用量对烟台地黄瓜幼苗的生长有明显的促进作用,随着缓释尿素用量的增加,烟台地黄瓜幼苗的株高、茎粗、生物量及壮苗指数先增加后降低,当用量为200 g/m3时,株高、茎粗、生物量及壮苗指数达到最大。因此缓释尿素在烟台地黄瓜基质育苗中的最适宜用量为200 g/m3。
关键词:缓释尿素;烟台地黄瓜;幼苗;生长
中图分类号:S642.206+.2文献标识号:A文章编号:1001-4942(2016)05-0086-03
Abstract Through a nutrition pot culture experiment, the effects of five slow release urea application rates, including 100, 150, 200, 250, 300 g/m3, on growth of Yantai ground cucumber seedlings were studied. The results showed that appropriate slow release urea application rate had significantly positive role on growth of Yantai ground cucumber. With the increase of slow release urea application rate, the plant height, stem diameter, biomass and seedling index of Yantai ground cucumber firstly increased and then decreased. And they reached the maximum when the slow release urea application rate was 200 g/m3. Thus, the best slow release urea application rate on growth of Yantai ground cucumber seedlings in nutrition pot was 200 g/m3.
Key words Slow release urea; Yantai ground cucumber; Seedling; Growth
缓释尿素是采用一定的工艺,在尿素中添加一定量的脲酶抑制剂、硝化抑制剂、天然两性有机物、被膜剂和调质剂等,使尿素具有长效缓释特性。缓释尿素能延缓氮素养分的释放速率,提高养分持续供应时间,其肥效比普通尿素缓慢,但肥效长,因此能有效增加作物产量和提高氮肥的利用率[1]。关于缓释尿素在植物生产中的应用研究主要有玉米[2~4]、水稻[5]、韭菜[6]、大蒜[7]、黄瓜[8]、大樱桃[9]等方面,其在黄瓜育苗中的应用研究尚未见报道。黄瓜幼苗生长过程中适宜用量的缓释尿素有利于培育壮苗,为黄瓜优质丰产奠定良好的基础。烟台地黄瓜鲜翠、爽口、营养丰富,深受广大消费者的喜爱,本试验以烟台地黄瓜为材料,采用营养钵育苗研究了缓释尿素不同用量对黄瓜幼苗生长影响,以期为烟台地黄瓜育苗生产中确定缓释尿素的合理施用量提供科学依据。
1 材料与方法……p>
