Effect of nitrogen source and calcitic lime on soil pH and potato yield, leaf chemical composition, and tuber cadmium concentrations
Effect of nitrogen source and calcitic lime on soil pH and potato yield, leaf chemical composition, and tuber cadmium concentrations
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DOI：
10.1081/pln-120003380
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发表时间：
2002-01-01
影响因子：
2.1
通讯作者：
Smart, MK
中科院分区：
文献类型：
--
作者：
Maier, NA;McLaughlin, MJ;Smart, MK
采用3个温室试验，研究了氮源和石灰对土壤pH（W）、马铃薯产量、叶片化学成分和块茎中镉（Cd）积累的影响。品种Russet伯班克和大西洋。施用的氮源为硝酸钙、硝酸铵、尿素和硫酸铵。钙化石灰率范围为0 ~ 20tha（-1）。石灰增加土壤pH值（W）值高达2.8个单位，并根据采样时间，土壤pH值（W）的差异高达1.8个单位之间发生的N源。在3个试验中，有2个试验石灰和氮源对块茎产量的影响存在显著的互作效应。当硝酸钙为氮源时，时间降低块茎产量。与此相反，随着硫酸铵产量的增加.施石灰和氮源对第5叶化学成分的影响在各试验间不一致。石灰显著降低钾（K），硫（S），硼（B），锰（Mn）的浓度和增加钙（Ca）和镁（Mg）的浓度。与硝酸钙相比，硫酸铵的施用持续降低了第5叶中的Ca和Mg浓度。石灰显着降低块茎镉浓度在所有实验中。当不施用石灰时，与硫酸铵相比，使用硝酸钙作为氮源导致块茎中镉浓度显着更高。这是可能的，在这种肥料中添加的钙通过从土壤表面置换镉增强镉的吸收。
Three glasshouse experiments, using light textured soils, were conducted to investigate the effects of nitrogen (N) source and calcitic lime on i) soil pH(W) (soil pH in water), ii) tuber yield, iii) leaf chemical composition, and iv) cadmium (Cd) accumulation in tubers of the potato (Solanum tuberosum L.) cultivars Russet Burbank and Atlantic. The N sources applied were calcium nitrate, ammonium nitrate, urea, and ammonium sulfate. Rates of calcitic lime ranged from 0 to 20 tha(-1). Liming increased soil pH(W) values up to 2.8 units, and depending on sampling time, differences in soil pH(W) of up to 1.8 units occurred between the N sources. In 2 of the 3 experiments there was a significant interaction between lime and N source in their effects on tuber yield. When calcium nitrate was the N source, timing decreased tuber yields. In contrast, with ammonium sulfate yield increased. The effects of liming and N source on the chemical composition of the 5th leaf were not consistent between experiments. Liming significantly decreased potassium (K), sulfur (S), boron (B), and manganese (Mn) concentrations and increased calcium (Ca) and magnesium (Mg) concentrations. The application of ammonium sulfate consistently decreased Ca and Mg concentrations in the 5th leaf compared with calcium nitrate. Liming significantly decreased tuber Cd concentrations in all experiments. The use of calcium nitrate as the N source resulted in significantly higher Cd concentrations in tubers compared with ammonium sulfate when no calcitic lime was applied. It is possible that Ca added in this fertilizer enhanced Cd uptake through displacement of Cd from soil surfaces.