准噶尔东部地区3种土壤类型137Cs与土壤颗粒的关系

doi:10.13866/j.azr.2022.02.15

摘要/Abstract

摘要：

为更加深入地了解土壤颗粒对¹³⁷Cs分布的影响,选取新疆准噶尔东部地区沙土、灰棕漠土和灰漠土3种主要的土壤类型,探讨不同土壤类型及自然地理环境条件下¹³⁷Cs与土壤颗粒的关系。结果表明：沙土、灰棕漠土和灰漠土均以>50 μm的颗粒占据主导地位,其占比介于51.35%~90.22%,中值粒径（D50）表现出风沙土>灰棕漠土>灰漠土的趋势;灰棕漠土 ¹³⁷Cs质量活度变化范围为0.32~15.70 Bq·kg^-1,其土壤剖面分布与<2 μm和2~5 μm的土壤颗粒具有较强的一致性;风沙土 ¹³⁷Cs比活度的分布分别与>50 μm土壤颗粒（0~14 cm）含量及D50剖面（0~12 cm）分布趋于一致,而灰漠土 ¹³⁷Cs比活度与各粒级土壤颗粒剖面并未表现出相同的变化趋势;风沙土和灰漠土中,对¹³⁷Cs质量活度影响最大的均为2~5 μm粒级的土壤颗粒,而灰棕漠土中 ¹³⁷Cs受10~50 μm粒级土壤颗粒影响最大。准噶尔东部地区3种土壤类型 ¹³⁷Cs均与土壤颗粒存在密切关系,通过土壤剖面不同粒级土壤颗粒含量预测不同剖面¹³⁷Cs质量活度具有一定参考价值。

关键词: ¹³⁷Cs, 土壤颗粒, 土壤类型, 准噶尔盆地东部地区

Abstract:

We selected three main soil types in the the eastern Jungar Basin, and explored the relationship between ¹³⁷Cs and soil particles and natural geographic environment conditions to further understand the influence of soil particles on the distribution of ¹³⁷Cs. The three soil types were dominated by soil particles > 50 μm, accounting for 51.35%-90.22% of the three soil types. The median particle size (D50) of aeolian sandy soil was greater than that of gray-brown desert soil, which was greater than that of gray desert soil. The range of ¹³⁷Cs mass activity in gray-brown desert soil was 0.32-15.70 Bq·kg^-1, The distribution of ¹³⁷Cs specific activity in aeolian sandy soil is consistent with the particle content of soil >50 μm and the distribution of D50 profile, but the specific activity of ¹³⁷Cs in gray desert soil followed a different trend from that of soil particles of various sizes. Among aeolian sand and gray desert soils, those with the greatest impact on the ¹³⁷Cs mass activity were 2-5 μm soil particles, whereas ¹³⁷Cs in the gray-brown desert soil were most affected by 10-50 μm soil particles. The content of soil particles in different grain fractions of the soil profile has certain reference value for predicting the mass activity of ¹³⁷Cs in different profiles.

Key words: ¹³⁷Cs, soil particle, soil type, the eastern Jungar Basin

杨建军,王和平,王明力,关添泽. 准噶尔东部地区3种土壤类型¹³⁷Cs与土壤颗粒的关系[J]. 干旱区研究, 2022, 39(2): 477-484.

YANG Jianjun,WANG Heping,WANG Mingli,GUAN Tianze. Relationship between ¹³⁷Cs and soil particles in the main soil types in the eastern Jungar Basin[J]. Arid Zone Research, 2022, 39(2): 477-484.

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土壤类型	样地编号	经度/（°）	纬度/（°）	海拔/m	土壤类型	土地利用类型	植被种类	盖度/%	坡度/(°)
风沙土	A1	88.75359	44.58966	535	风沙土	沙地	梭梭,猪毛菜,麻黄	10	7
	A2	89.17236	44.65644	513	风沙土	沙地	无植被	0	6
	A3	89.57170	44.52003	589	风沙土	沙地	蛇麻黄,梭梭,沙拐枣	15	9
	A4	89.61073	44.26524	660	风沙土	沙地	蛇麻黄,梭梭	3	8
	A5	88.58902	45.11037	651	风沙土	沙地	梭梭、沙拐枣,蒿类	2	5
	A6	88.79174	44.75451	473	风沙土	沙地	白刺	5	6
灰棕漠土	B1	89.20479	45.04564	893	灰棕漠土	裸地	麻黄,梭梭等	3	6
	B2	89.20845	44.79878	581	灰棕漠土	裸地	无	0	5
	B3	89.61124	44.79412	612	灰棕漠土	裸地	无	0	8
	B4	90.10096	44.63104	594	灰棕漠土	裸地	无	0	6
	B5	89.35170	44.74213	473	灰棕漠土	裸地	假木贼,植被	1	8
灰漠土	C1	88.60051	44.38902	521	灰漠土	沙地	小麦	100	5
	C2	90.34991	44.27048	793	灰漠土	沙地	琵琶柴、梭梭	1	7
	C3	89.11397	44.24088	582	灰漠土	耕地	小麦	100	7

土壤类型	各粒径含量/%					D50
土壤类型	<2 μm	2~5 μm	5~10 μm	10~50 μm	>50 μm	D50
风沙土	0.81±0.59a	1.58±1.09a	1.40±0.91a	5.99±3.29b	90.22±5.86a	156.05±22.30a
灰棕漠土	5.16±1.99a	9.69±2.88a	6.68±1.52a	14.46±1.99b	64.01±7.82ab	115.94±28.40a
灰漠土	1.46±0.64a	4.75±1.63a	5.85±1.82a	36.59±7.00a	51.35±10.26b	56.12±15.14a

土壤类型	<2 μm	2~5 μm	5~10 μm	10~50 μm	>50 μm	D50
风沙土	-0.31^*	-0.34^*	-0.34^*	-0.29^*	0.33^*	0.26
灰棕漠土	0.02	0.234	0.46^*	0.75^**	-0.44^*	-0.44^*
灰漠土	-0.37	-0.47^*	-0.38	-0.01	0.11	-0.06

土壤类型	模型	R²	RSME	显著性水平（P）
风沙土	-0.39X₂+4.35	0.782	2.03	0.02
灰棕漠土	0.47X₄-2.73	0.879	1.95	0.00
灰漠土	-0.94X₂+5.17	0.681	2.50	0.03

准噶尔东部地区3种土壤类型¹³⁷Cs与土壤颗粒的关系

Relationship between ¹³⁷Cs and soil particles in the main soil types in the eastern Jungar Basin

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