文章基本信息

标题：Effects of Plant Density and Nitrogen Fertilizer on Nitrogen Uptake from Soil and Nitrate Pollution in Potato Tuber
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作者：Sh. Jamaati-e-Somarin ; A. Tobeh ; M. Hassanzadeh 等
期刊名称：Research Journal of Environmental Sciences
印刷版ISSN：1819-3412
电子版ISSN：2152-8238
出版年度：2009
卷号：3
期号：1
页码：122-126
DOI：10.3923/rjes.2009.122.126
出版社：Academic Journals Inc., USA
摘要：In order to investigate plant density and nitrogen fertilizer on nitrogen uptake from soil and nitrate pollution in potato tuber cu. Agria, a factorial experiment based on randomized complete block design with three replications was carried out in Ardabil, Iran, in 2006. Factors were nitrogen levels (0, 80, 160 and 200 kg ha^-1 net nitrogen) and plant densities (5.5, 7.5 and 11 plant m^-2). Results showed that the most nitrogen uptake by plant aerial parts and the most nitrate concentration in dry and fresh tuber weight were observed at 200 kg ha^-1 nitrogen, 11 plant m^-2 and 200 kg ha^-1 nitrogen, 5.5 plant m^-2, respectively. At 160 kg ha^-1 nitrogen (as equal to 80 kg ha^-1 nitrogen) and 11 plant m^-2, the most tuber and yield of tuber were gained. With increasing nitrogen application up to 160 kg ha^-1, nitrogen uptake by tuber, number of tuber, tuber dry weight and mean tuber weight was increased. 160 and 80 kg ha^-1 nitrogen jointly with density of 5.5 plant m^-2, caused the most mean tuber weight per plant. So, utilization of 80 kg ha^-1 nitrogen to reach highest yield and less nitrate pollution, density of 11 plant m^-2 to gain seed tuber (because of reduction in tuber weight and size) and density of 7.5 plant m^-2 for eating usages, are recommended.