NITRATE/AMMONIUM RATIOS AFFECT RYEGRASS GROWTH AND NITROGEN ACCUMULATION IN A HYDROPONIC SYSTEM

被引：24

作者：

Cao, Haiqin ^{[1
]}

Ge, Ying ^{[1
]}

Liu, Dong ^{[1
]}

Cao, Qianjin ^{[1
]}

Chang, Scott X. ^{[2
]}

Chang, Jie ^{[1
]}

Song, Xiulin ^{[1
]}

Lin, Xue ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Life Sci, Hangzhou 310058, Zhejiang, Peoples R China

[2] Univ Alberta, Dept Renewable Resources, Edmonton, AB, Canada

来源：

JOURNAL OF PLANT NUTRITION | 2010年 / 34卷 / 02期

基金：

中国国家自然科学基金;

关键词：

wastewater; N concentration; dry matter production; root growth; root shoot ratio; WASTE-WATER TREATMENT; VULGARIS L. PLANTS; AMMONIUM NUTRITION; CONSTRUCTED WETLANDS; SUPPLIED NITROGEN; NITRATE; FORM; ASSIMILATION; BARLEY; CHINA;

D O I：

10.1080/01904167.2011.533322

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Ryegrass has increasingly been used in constructed wetlands for treatment of eutrophic wastewater. To properly match plant species with the characteristics of wastewater being treated, it is important to know the performance of plant species under different nitrate/ammonium (NO3-/NH4+) ratios. We investigated ryegrass (Lolium perenne L.) dry matter (DM) production and N accumulation under five NO3-/NH4+ ratios (100/0, 75/25, 50/50, 25/75, 0/100) in a hydroponic system. The results showed that ryegrass total DM, shoot DM, root DM and nitrogen (N) accumulation were greater under NO3-/NH4+ ratios of 50/50 and 75/25 than under other NO3-/NH4+ ratios, indicating that ryegrass can be best used in constructed wetlands for treating wastewater with such NO3-/NH4+ ratios to achieve high biomass production and efficient removal of N. On the other hand, for treating wastewater with either NO3- or NH4+ dominate the inorganic N, other plant species that are more adapted to such conditions should be explored.

引用

页码：206 / 216

页数：11

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