EFFECT OF NITRATE/AMMONIUM RATIOS ON GROWTH, ROOT MORPHOLOGY AND NUTRIENT ELEMENTS UPTAKE OF WATERMELON (CITRULLUS LANATUS) SEEDLINGS

被引：30

作者：

Liu Na ^{[1
,2
]}

Zhang Li ^{[1
,2
]}

Meng Xiangxiang ^{[1
,2
]}

Ara, Neelam ^{[1
,2
]}

Yang Jinghua ^{[1
,2
]}

Zhang Mingfang ^{[1
,2
]}

机构：

[1] Zhejiang Univ, Dept Hort, Lab Genet Resources & Funct Improvement Hort Plan, Hangzhou 310029, Zhejiang, Peoples R China

[2] Minist Agr, Lab Hort Plant Growth Dev & Qual Improvement, Hangzhou, Zhejiang, Peoples R China

来源：

JOURNAL OF PLANT NUTRITION | 2014年 / 37卷 / 11期

基金：

国家高技术研究发展计划(863计划);

关键词：

watermelon (Citrullus lanatus); nitrogen form; dry matter production; root morphology; mineral nutrition; NITRATE NUTRITION; NITROGEN FORM; TRANSPORT-SYSTEMS; TOMATO PLANTS; AMMONIUM; ARABIDOPSIS; POTASSIUM; RESPONSES; TOXICITY; YIELD;

D O I：

10.1080/01904167.2014.911321

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Nitrogen is taken up by most plant species in the form of nitrate and ammonium. The objective of this study was to investigate the effect of different nitrogen forms on the growth of watermelon seedlings. Plants were grown in hydroponic culture with five nitrate (NO3-)/ammonium (NH4+) ratios (100/0, 75/25, 50/50, 25/75, 0/100). When the proportion of NH4+ was increased, the leaf number, leaf area, shoot height, net photosynthesis, biomass, and root growth were significantly decreased. Higher concentrations of nitrogen (N) and phosphorus (P) were observed when plants were supplied with mixed NO3- and NH4+ compared to NO3- or NH4+ alone, whereas the concentrations of potassium (K), calcium (Ca), and magnesium (Mg) were decreased with increasing NH4+. The microelements concentrations were generally increased with more NH4+ added. In addition, plants fed with higher NO3-/NH4+ ratios resulted in more minerals accumulation.

引用

页码：1859 / 1872

页数：14

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