Soil Particle Composition and Nutrient Characteristics of Wind Erosion Pits in Sandy Grassland

doi:10.13304/j.nykjdb.2024.0060

Abstract

Abstract:

In order to investigate the evolutionary characteristics of soil quality of grassland wind erosion pit development and its impact on the structure and function of grassland ecosystems， wind erosion pits at different development stages of typical sandy grassland in Duolun county were as a research object， surrounding unwind-eroded grassland as control （CK）. Soil particle size composition and nutrient characteristics of grassland wind erosion pits were analyzed by means of field observations and indoor indicator measurements. The results showed that the average particle size of the study area was 1.65~3.55 μm. The average particle sizes of the unwind-eroded grassland and the extinction stage were significantly higher than those of other development stages， and the average particle size of the active development stage was the lowest. The soil particle size gradually coarsened during the development of the wind erosion pit， the content of coarse sand increased to 9.72% in the active development stage， which the distribution of soil particle was the worst. Powder particle was reduced to 0.87% and 0.88%， respectively， in the active development stage and activation stage. As the wind erosion pits gradually moved towards extinction， the soil particles becomed finer， the coarse sand decreased， and the clay particles keeped increasing in extinction stage. The soil organic matter （SOM）， available potassium （AK） and available phosphorus （AP） contents were significant differences among different development stages of wind erosion pits， while there was no significant difference in alkaline hydrolysis nitrogen （AN） content. The development of wind erosion pits could cause significantly loss of soil SOM and AK， AP content decreased in initial develop stage and then increased in active development stage， and AN content varied less during the development of the wind erosion pits.

Key words: wind erosion pit, soil particle size, nutrient characteristics, formative and developmental stage

摘要：

为探究草原风蚀坑发育土壤质量的演化特征及对草原生态系统结构和功能的影响，以多伦县典型沙质草原不同发育阶段的风蚀坑为研究对象，周围未风蚀草地为对照（CK），通过野外实地观测、室内指标测定等手段分析草原风蚀坑的土壤粒度组成及养分特征。结果表明，研究区土壤平均粒径为1.65~3.55 μm，未风蚀草地、消亡阶段土壤的平均粒径显著高于其他发育阶段，其中活跃发展阶段的土壤平均粒径最低。风蚀坑在发育过程中土壤粒径逐渐粗化，至活跃发展阶段粗砂含量增至9.72%，土壤颗粒分布情况最差。粉粒在活跃发展阶段和活化阶段分别降低至0.87%和0.88%。当风蚀坑逐渐走向消亡，至消亡阶段时土壤颗粒变细，粗砂减少，黏粒不断增加。风蚀坑的土壤有机质、速效钾、速效磷含量间存在显著差异，而碱解氮含量差异不显著。风蚀坑发育会造成土壤有机质和速效钾大量流失，速效磷含量在风蚀坑开始发展时减少，至活跃发展阶段时又有所增加，碱解氮含量在整个发育过程中变化较小。

关键词: 风蚀坑, 土壤粒度, 养分特征, 形成发育阶段

CLC Number:

S153

Juan YANG, Yong GAO, Ruidong WANG, Tianxiao GAO, Wenyuan YANG, Min HAN. Soil Particle Composition and Nutrient Characteristics of Wind Erosion Pits in Sandy Grassland[J]. Journal of Agricultural Science and Technology, 2024, 26(10): 186-194.

杨娟, 高永, 王瑞东, 高天笑, 杨文源, 韩敏. 沙质草原风蚀坑土壤粒度组成及养分特征[J]. 中国农业科技导报, 2024, 26(10): 186-194.

Figures/Tables 6

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发育阶段 Developmental stage	土层 Soil layer/cm	黏粒 Clay	粉粒 Powder particle	砂粒Grit
发育阶段 Developmental stage	土层 Soil layer/cm	黏粒 Clay	粉粒 Powder particle	极细砂 Very fine sand	细砂 Fine sand	中砂 Medium sand	粗砂 Coarse sand
未风蚀草地 Unwind-eroded grassland	0—10	13.71±2.02 a	20.60±9.41 a	0.16±0.26 a	33.78±19.30 a	30.21±7.40 b	1.54±1.97 b
	10—20	10.98±2.78 a	11.11±2.68 a	0.51±0.88 a	39.61±18.36 a	35.56±15.05 a	2.23±3.05 a
	0—20	12.34±2.17 a	15.85±5.24 a	0.34±0.57 a	36.70±18.75 a	32.88±11.16 b	1.89±2.50 b
裸地沙斑 Bare sand spots	0—10	7.10±1.36 b	2.93±1.41 b	0.19±0.29 a	44.30±12.10 a	43.43±11.90 ab	2.05±1.56 b
	10—20	5.71±0.24 b	1.53±0.72 c	0.19±0.16 a	49.26±12.76 a	41.59±10.41 a	1.71±2.00 a
	0—20	6.40±0.71 b	2.23±0.89 b	0.19±0.20 a	46.79±11.77 a	42.51±10.15 ab	1.88±1.65 b
活跃发展 Active development	0—10	3.82±0.64 b	1.04±0.55 b	0.01±0.00 a	25.03±9.29 a	58.87±4.59 a	11.24±6.30 a
	10—20	3.15±1.01 b	0.70±0.98 c	0.09±0.09 a	36.72±21.56 a	51.13±11.82 a	8.21±11.39 a
	0—20	3.48±0.80 b	0.87±0.75 b	0.05±0.04 a	30.88±14.86 a	55.00±8.19 a	9.72±8.01 a
固定阶段 Stationary stage	0—10	7.29±2.85 b	1.53±0.74 b	0.09±0.09 a	42.85±12.60 a	45.62±12.36 ab	2.62±3.02 b
	10—20	5.03±1.58 b	0.60±0.48 c	0.28±0.48 a	44.22±18.87 a	46.54±15.47 a	3.32±3.21 a
	0—20	6.11±1.79 b	1.07±0.29 b	0.27±0.32 a	43.53±13.73 a	46.06±12.54 ab	2.96±2.31 b
消亡阶段 Extinction stage	0—10	12.24±5.03 a	4.03±3.00 b	0.04±0.03 a	42.36±8.05 a	40.35±5.81 ab	0.98±0.58 b
	10—20	13.61±5.55 a	7.56±3.84 b	0.07±0.08 a	42.49±13.07 a	35.60±5.31 a	0.67±0.52 a
	0—20	12.92±5.02 a	5.80±3.16 b	0.06±0.04 a	42.42±10.07 a	37.97±2.01 ab	0.83±0.37 a
活化阶段 Activation stage	0—10	5.10±0.71 b	1.26±0.60 b	0.29±0.44 a	49.94±11.71 a	41.80±12.00 ab	1.61±1.20 b
	10—20	3.99±0.13 b	0.49±0.13 c	0.05±0.05 a	42.66±9.92 a	49.60±7.28 a	3.20±2.70 a
	0—20	4.54±0.41 b	0.88±0.36 b	0.17±0.21 a	46.30±8.14 a	45.70±7.02 ab	2.41±1.66 b

发育阶段 Developmental stage	土层 Soil layer/cm	黏粒 Clay	粉粒 Powder particle	砂粒Grit
发育阶段 Developmental stage	土层 Soil layer/cm	黏粒 Clay	粉粒 Powder particle	极细砂 Very fine sand	细砂 Fine sand	中砂 Medium sand	粗砂 Coarse sand
未风蚀草地 Unwind-eroded grassland	0—10	13.71±2.02 a	20.60±9.41 a	0.16±0.26 a	33.78±19.30 a	30.21±7.40 b	1.54±1.97 b
	10—20	10.98±2.78 a	11.11±2.68 a	0.51±0.88 a	39.61±18.36 a	35.56±15.05 a	2.23±3.05 a
	0—20	12.34±2.17 a	15.85±5.24 a	0.34±0.57 a	36.70±18.75 a	32.88±11.16 b	1.89±2.50 b
裸地沙斑 Bare sand spots	0—10	7.10±1.36 b	2.93±1.41 b	0.19±0.29 a	44.30±12.10 a	43.43±11.90 ab	2.05±1.56 b
	10—20	5.71±0.24 b	1.53±0.72 c	0.19±0.16 a	49.26±12.76 a	41.59±10.41 a	1.71±2.00 a
	0—20	6.40±0.71 b	2.23±0.89 b	0.19±0.20 a	46.79±11.77 a	42.51±10.15 ab	1.88±1.65 b
活跃发展 Active development	0—10	3.82±0.64 b	1.04±0.55 b	0.01±0.00 a	25.03±9.29 a	58.87±4.59 a	11.24±6.30 a
	10—20	3.15±1.01 b	0.70±0.98 c	0.09±0.09 a	36.72±21.56 a	51.13±11.82 a	8.21±11.39 a
	0—20	3.48±0.80 b	0.87±0.75 b	0.05±0.04 a	30.88±14.86 a	55.00±8.19 a	9.72±8.01 a
固定阶段 Stationary stage	0—10	7.29±2.85 b	1.53±0.74 b	0.09±0.09 a	42.85±12.60 a	45.62±12.36 ab	2.62±3.02 b
	10—20	5.03±1.58 b	0.60±0.48 c	0.28±0.48 a	44.22±18.87 a	46.54±15.47 a	3.32±3.21 a
	0—20	6.11±1.79 b	1.07±0.29 b	0.27±0.32 a	43.53±13.73 a	46.06±12.54 ab	2.96±2.31 b
消亡阶段 Extinction stage	0—10	12.24±5.03 a	4.03±3.00 b	0.04±0.03 a	42.36±8.05 a	40.35±5.81 ab	0.98±0.58 b
	10—20	13.61±5.55 a	7.56±3.84 b	0.07±0.08 a	42.49±13.07 a	35.60±5.31 a	0.67±0.52 a
	0—20	12.92±5.02 a	5.80±3.16 b	0.06±0.04 a	42.42±10.07 a	37.97±2.01 ab	0.83±0.37 a
活化阶段 Activation stage	0—10	5.10±0.71 b	1.26±0.60 b	0.29±0.44 a	49.94±11.71 a	41.80±12.00 ab	1.61±1.20 b
	10—20	3.99±0.13 b	0.49±0.13 c	0.05±0.05 a	42.66±9.92 a	49.60±7.28 a	3.20±2.70 a
	0—20	4.54±0.41 b	0.88±0.36 b	0.17±0.21 a	46.30±8.14 a	45.70±7.02 ab	2.41±1.66 b

发育阶段 Developmental stage	土层 Soil layer/cm	平均粒径 Mean particle size/μm	分选系数 Sorting factor	偏度 Skewness	峰态 Peak state
未风蚀草地 Unwind-eroded grassland	0—10	3.67±0.06 a	2.57±0.17 a	0.74±0.04 a	1.17±0.91 c
	10—20	3.41±0.30 a	2.41±0.19 a	0.77±0.02 a	2.23±1.34 ab
	0—20	3.55±0.17 a	2.51±0.17 a	0.76±0.01 a	1.34±1.15 b
裸地沙斑 Baresand spots	0—10	1.98±0.21 bc	1.36±0.05 bc	0.45±0.02 b	3.65±0.14 a
	10—20	1.98±0.16 b	1.29±0.01 b	0.43±0.01 b	3.67±0.10 a
	0—20	1.98±0.16 bc	1.33±0.03 bc	0.44±0.01 bc	3.67±0.06 a
活跃发展 Active development	0—10	1.58±0.17 c	0.79±0.39 c	0.22±0.17 c	1.93±1.47 bc
	10—20	1.73±0.36 b	0.74±0.39 b	0.19±0.19 c	1.77±1.31 ab
	0—20	1.65±0.25 c	0.78±0.39 c	0.19±0.19 d	1.82±1.35 ab
固定阶段 Stationary stage	0—10	1.93±0.24 bc	1.35±0.07 bc	0.45±0.03 b	3.81±0.21 a
	10—20	1.88±0.25 b	0.84±0.46 b	0.24±0.18 bc	2.10±1.67 ab
	0—20	1.90±0.21 bc	1.33±0.05 bc	0.43±0.01 bc	3.76±0.24 a
消亡阶段 Extinction stage	0—10	2.61±0.97 b	1.87±0.78 b	0.59±0.18 ab	3.35±0.96 ab
	10—20	3.09±0.85 a	2.19±0.69 a	0.70±0.15 a	2.59±1.73 ab
	0—20	2.68±0.94 b	1.91±0.78 ab	0.61±0.17 ab	2.70±1.79 ab
活化阶段 Activation stage	0—10	1.98±0.19 bc	1.24±0.06 bc	0.41±0.01 b	3.49±0.21 a
	10—20	1.84±0.13 b	0.56±0.02 b	0.13±0.01 c	1.12±0.03 b
	0—20	1.91±0.12 bc	1.02±0.39 c	0.32±0.15 cd	2.68±1.32 ab

发育阶段 Developmental stage	土层 Soil layer/cm	平均粒径 Mean particle size/μm	分选系数 Sorting factor	偏度 Skewness	峰态 Peak state
未风蚀草地 Unwind-eroded grassland	0—10	3.67±0.06 a	2.57±0.17 a	0.74±0.04 a	1.17±0.91 c
	10—20	3.41±0.30 a	2.41±0.19 a	0.77±0.02 a	2.23±1.34 ab
	0—20	3.55±0.17 a	2.51±0.17 a	0.76±0.01 a	1.34±1.15 b
裸地沙斑 Baresand spots	0—10	1.98±0.21 bc	1.36±0.05 bc	0.45±0.02 b	3.65±0.14 a
	10—20	1.98±0.16 b	1.29±0.01 b	0.43±0.01 b	3.67±0.10 a
	0—20	1.98±0.16 bc	1.33±0.03 bc	0.44±0.01 bc	3.67±0.06 a
活跃发展 Active development	0—10	1.58±0.17 c	0.79±0.39 c	0.22±0.17 c	1.93±1.47 bc
	10—20	1.73±0.36 b	0.74±0.39 b	0.19±0.19 c	1.77±1.31 ab
	0—20	1.65±0.25 c	0.78±0.39 c	0.19±0.19 d	1.82±1.35 ab
固定阶段 Stationary stage	0—10	1.93±0.24 bc	1.35±0.07 bc	0.45±0.03 b	3.81±0.21 a
	10—20	1.88±0.25 b	0.84±0.46 b	0.24±0.18 bc	2.10±1.67 ab
	0—20	1.90±0.21 bc	1.33±0.05 bc	0.43±0.01 bc	3.76±0.24 a
消亡阶段 Extinction stage	0—10	2.61±0.97 b	1.87±0.78 b	0.59±0.18 ab	3.35±0.96 ab
	10—20	3.09±0.85 a	2.19±0.69 a	0.70±0.15 a	2.59±1.73 ab
	0—20	2.68±0.94 b	1.91±0.78 ab	0.61±0.17 ab	2.70±1.79 ab
活化阶段 Activation stage	0—10	1.98±0.19 bc	1.24±0.06 bc	0.41±0.01 b	3.49±0.21 a
	10—20	1.84±0.13 b	0.56±0.02 b	0.13±0.01 c	1.12±0.03 b
	0—20	1.91±0.12 bc	1.02±0.39 c	0.32±0.15 cd	2.68±1.32 ab