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Effect of Different Nitrogen Forms on Growth and Nutrients Uptake of Cucumber Seedlings in Sand Culture(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2015年01
Page:
8-11
Research Field:
Publishing date:

Info

Title:
Effect of Different Nitrogen Forms on Growth and Nutrients Uptake of Cucumber Seedlings in Sand Culture
Author(s):
WANG Chang-xian; XIAO Long
(Key Laboratory of Agricultural Resources Utilization and Environmental Security,Heilongjiang University,College of Agricultural Resources and Environment,Heilongjiang University,Harbin,Heilongjiang 150080)
Keywords:
Keywords:cucumber; NO3--N; NH4 +-N; growth; nutrients; nitrate reductase; free amino acid
PACS:
-
DOI:
10.11937/bfyy.201501003
Abstract:
Abstract:Taking ‘Jinchun No. 3’ which was main cucumber variety of Heilongjiang as materials,a pot experiment was conducted to investigate the effect of ratio of NO3--N to NH4 +-N on cucumber seedling growth and N and P uptake.The results showed that maintaining the total N concentration in solution at 15 mmoL/L,seedlings became weak in growth with the increasing of NH4 +-N ration in sands.The leaf area,dry weight and the indexes of seedling’s quality treated by NO3--N were 1. 92 times,2. 12 times and 3. 07 times higher than NH4 +-N treatment.The effect of ratio of NO3--N to NH4 +-N on N content and nitrate reductase activity were not significant；however,the effect on P content was significant,the P content in shoots treated by NO3--N was 2 times higher than NH4 +-N treatment.For the damage caused by NH3,the root activity of seedlings treated by NH4 +-N decreased significantly,but increase in free amino acid content was detected.The quality of seedlings treated by NO3--N was the best.

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Last Update: 2015-02-09