引用本文
  •    [点击复制]
  •    [点击复制]
【打印本页】 【在线阅读全文】【下载PDF全文】 View/Add CommentDownload reader Close

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 81次   下载 189 本文二维码信息
码上扫一扫!
0
()
摘要:
关键词:  
DOI:
Received:July 24, 2017Revised:September 01, 2017
基金项目:
The Effect of Nitrate to Ammonium Nitrogen Ratio on the Growth of Hovenia acerba Seedlings
()
Abstract:
The effect of different nitrogen source ratios, which the ratio of NO3--N to NH4 -N were 100 : 0, 75 : 25, 50 : 50, 25 : 75 and 0 : 100, on the seedling growth of Hovenia acerba were studied by sand culture method. The results indicated that with the increase of nitrate nitrogen ratio, the plant height, stem diameter, branch number and biomass of the H. acerba were ascending. The plant height and stem diameter with the ratios of NO 3 --N to NH 4 -N equal to 100 : 0 and 75 : 25, as well as branch number and whole plant biomass with ration of, 75 : 25 were significantly higher than other treatments. With the ratios equal to 75 : 25 and 50 : 50, the median leaf area were the highest. While median leaf area was the smallest with the ratio of 0 : 100, and the leaf apex withered and curled. The content of chlorophyll a and chlorophyll b in the treatment with ratio of 50 : 50 were significantly lower than those in other treatments. The soluble sugar content in leaves treated with ratio of 100 : 0, 75 : 25 and 0 : 100 increased significantly. The leaf nitrogen contents with raitio of 75 : 25 and 100 : 0 were significantly lower than those of other treatments. The nitrogen content of the stem with ratio of 50 : 50was the lowest, and the nitrogen content with ratio of 75 : 25 root was significantly lower than that of 0 : 100. However, the difference with other treatments was not significant. The nitrogen content with ratio of 0 : 100 was significantly higher than that of other treatments, showing the short plants and decaying roots. It can be seen that nitrogen source and proportion significantly affect the growth of H. acerba, single ammonium nitrogen is unfavorable to the growth of H. acerba, and the ratio of NO3--N to NH4 -N equal to 75 : 25 is more suitable for the growth of H. acerba.
Key words:  Hovenia acerba; nitrogen form; biomass; soluble sugar; total nitrogen

用微信扫一扫

用微信扫一扫