Agriculture Ecology and Environment Laboratory, College of Plant Science, Jilin University, Changchun, People's Republic of China.
Soil and fertilizer Institution of Tonghua, Tonghua, People's Republic of China.
J Ginseng Res. 2015 Jan;39(1):81-8. doi: 10.1016/j.jgr.2014.08.002. Epub 2014 Aug 28.
In Changbai Mountains, Panax ginseng (ginseng) was cultivated in a mixture of the humus and albic horizons of albic luvisol in a raised garden with plastic shade. This study aimed to evaluate the impact of ginseng planting on soil characteristics.
The mixed-bed soils were seasonally collected at intervals of 0-5 cm, 5-10 cm, and 10-15 cm for different-aged ginsengs. Soil physico-chemical characteristics were studied using general methods. Aluminum was extracted from the soil solids with NH4Cl (exchangeable Al) and Na-pyrophosphate (organic Al) and was measured with an atomic absorption spectrophotometer.
A remarkable decrease in the pH, concentrations of exchangeable calcium, NH4 (+), total organic carbon (TOC), and organic Al, as well as a pronounced increase in the bulk density were observed in the different-aged ginseng soils from one spring to the next. The decrease in pH in the ginseng soils was positively correlated with the [Formula: see text] (r = 0.463, p < 0.01), exchangeable calcium (r = 0.325, p < 0.01) and TOC (r = 0.292, p < 0.05) concentrations. The [Formula: see text] showed remarkable surface accumulation (0-5 cm) in the summer and even more in the autumn but declined considerably the next spring. The exchangeable Al fluctuated from 0.10 mg g(-1) to 0.50 mg g(-1) for dry soils, which was positively correlated with the [Formula: see text] (r = 0.401, p < 0.01) and negatively correlated with the TOC (r = -0.329, p < 0.05). The Al saturation varied from 10% to 41% and was higher in the summer and autumn, especially in the 0-5 cm and 5-10 cm layers.
Taken together, our study revealed a seasonal shift in soil characteristics in ginseng beds with plastic shade.
在长白山，人参（人参）种植在一个由腐殖质和白浆土的白土层组成的混合床上，用塑料遮阳棚抬高。本研究旨在评估人参种植对土壤特性的影响。
不同年龄的人参每隔 0-5cm、5-10cm 和 10-15cm 季节采集混合床土壤。采用常规方法研究土壤理化特性。用 NH4Cl（可交换铝）和 Na-焦磷酸盐（有机铝）从土壤固体中提取铝，并用原子吸收分光光度计测量。
从一个春天到下一个春天，不同年龄的人参土壤的 pH 值、可交换钙、NH4（+）、总有机碳（TOC）和有机铝浓度显著降低，容重显著增加。人参土壤 pH 值的降低与[公式：见文本]（r=0.463，p<0.01）、可交换钙（r=0.325，p<0.01）和 TOC（r=0.292，p<0.05）浓度呈正相关。[公式：见文本]在夏季表现出显著的表面积累（0-5cm），甚至在秋季更为明显，但在下一个春季则显著减少。交换性铝在干燥土壤中从 0.10mg g（-1）波动到 0.50mg g（-1），与[公式：见文本]呈正相关（r=0.401，p<0.01），与 TOC 呈负相关（r=-0.329，p<0.05）。铝饱和度从 10%变化到 41%，在夏季和秋季较高，特别是在 0-5cm 和 5-10cm 层。
综上所述，我们的研究揭示了塑料遮阳棚下人参床土壤特性的季节性变化。
