新疆农业科学 ›› 2023, Vol. 60 ›› Issue (8): 1996-2005.DOI: 10.6048/j.issn.1001-4330.2023.08.021
王燕1(), 武兴宝1, 秦新惠1, 张永久1, 杨丽1, 赵哈林2
收稿日期:
2022-11-05
出版日期:
2023-08-20
发布日期:
2023-08-14
作者简介:
王燕(1983-),女,甘肃庆阳人,讲师,博士,研究方向为生态恢复和土壤盐渍化,(E-mail)821934145@qq.com
基金资助:
WANG Yan1(), WU Xingbao1, QIN Xinhui1, ZHANG Yongjiu1, YANG Li1, ZHAO Halin2
Received:
2022-11-05
Online:
2023-08-20
Published:
2023-08-14
Correspondence author:
WANG Yan (1983-), female, born in Qingyang, Gansu Province, doctor, lecturer, her research direction is ecological restoration and soil salinization, (E-mail)821934145@qq.comSupported by:
摘要:
【目的】研究荒漠绿洲农田盐渍化生态系统土壤C、N、P含量生态化学计量学特征,为盐渍化治理提供参考。【方法】以空间代替时间的方法,选取干旱绿洲区紫花苜蓿和大麦2种作物不同盐渍化农田为对象,以未盐渍化农田为对照,研究农田盐渍化过程中土壤(0~40 cm)C、N、P生态化学计量特征。【结果】(1)在0~40 cm土层,随盐渍化程度的加剧,紫花苜蓿地土壤SOC和TN含量表现为先增后减的变化,全磷(TP)含量表现为波动式降低;大麦地土壤SOC、TN和TP含量表现为波动式降低的变化。2种作物地,不同盐渍化阶段农田土壤养分含量垂直分布上表现出明显的“表聚性”特征。(2)在农田盐渍化过程中,随盐渍化的加剧,在紫花苜蓿地,C/N呈“V”型变化;在中度盐渍化阶段C/N比值最低;C/P和N/P值表现为先增后减的变化趋势,在中度盐渍化阶段C/P和N/P值比值最高;在大麦地,C/N值表现为波动式增加,C/P值和N/P值表现为降低趋势。在紫花苜蓿地,0~10、10~20、20~40 cm土层土壤C/N在不同盐渍化阶段间无显著性差异;2种作物地,在各盐渍化阶段土壤C/N、C/P及N/P在不同土层间也无显著性差异。(3)2种作物地,土壤SOC与土壤TN、土壤TP、C/P、N/P有显著的正相关关系;TN与C/N呈显著负相关关系(P<0.05),与C/P、N/P呈极显著正相关关系(P<0.01);土壤C/N与N/P有极显著负相关关系,C/P与N/P有极显著正相关关系(P<0.01)。在2种作物地,TP与C/N、C/P、N/P没有显著相关性。(4)土壤养分化学计量特征,在紫花苜蓿地,与土壤含水量、土壤电导率和土壤黏粉粒含量有显著相关关系(P<0.05);在大麦地,与土壤含水量、土壤电导率、土壤容重和土壤温度有显著相关关系。【结论】在农田盐渍化过程中土壤SOC与TN是影响土壤养分生态化学计量比的主要因素,TP不是土壤养分限制的主要因素。
中图分类号:
王燕, 武兴宝, 秦新惠, 张永久, 杨丽, 赵哈林. 荒漠绿洲农田盐渍化过程中的土壤碳、氮、磷生态化学计量特征[J]. 新疆农业科学, 2023, 60(8): 1996-2005.
WANG Yan, WU Xingbao, QIN Xinhui, ZHANG Yongjiu, YANG Li, ZHAO Halin. Ecological stoichiometry of soil carbon, nitrogen and phosphorus in farmland salinization in arid oasis[J]. Xinjiang Agricultural Sciences, 2023, 60(8): 1996-2005.
作物 Crop | 不同盐 渍化农田 Different salinized stages | 有机碳 Soil organic carbon (g/kg) | 全氮 Total nitrogen (g/kg) | 全磷 Total phosphorus (g/kg) | C/N | C/P | N/P |
---|---|---|---|---|---|---|---|
大麦 Barley | CK | 7.82±1.40A | 0.86±0.19A | 1.37±0.12AB | 9.33±0.35B | 5.74±1.06A | 0.63±0.15A |
S1 | 8.18±0.76A | 0.87±0.10A | 1.49±0.14A | 9.50±0.73B | 5.55±0.64A | 0.59±0.11AB | |
S2 | 6.36±0.63B | 0.65±0.07B | 1.30±0.01B | 9.78±0.19AB | 4.91±0.48AB | 0.50±0.05AB | |
S3 | 5.04±0.25BC | 0.57±0.06BC | 1.27±0.05B | 8.98±0.51B | 4.00±0.33BC | 0.45±0.06BC | |
S4 | 4.22±0.36C | 0.40±0.04C | 1.30±0.04B | 10.50±0.33A | 3.23±0.24C | 0.31±0.02C | |
苜蓿 Alfalfa | CK | 5.33±0.39ABC | 0.52±0.06AB | 1.61±0.17A | 10.31±0.31A | 3.32±0.10B | 0.32±0.00BC |
S1 | 6.30±0.73A | 0.62±0.08A | 1.66±0.06A | 10.25±0.93A | 3.79±0.44AB | 0.37±0.04B | |
S2 | 5.83±0.25AB | 0.63±0.05A | 1.38±0.11B | 9.25±0.35B | 4.24±0.25A | 0.46±0.03A | |
S3 | 4.76±1.04BC | 0.47±0.10B | 1.39±0.10B | 10.09±0.44AB | 3.40±0.53B | 0.34±0.05BC | |
S4 | 4.22±0.36C | 0.40±0.04B | 1.30±0.04B | 10.50±0.33A | 3.23±0.24B | 0.31±0.02C |
表1 两种作物地不同盐渍化阶段0~40 cm土层C、N、P含量均值及其化学计量比特征
Tab.1 Mean values of soil C, N, P content and stoichiometry in different salinized stages in two farmlands
作物 Crop | 不同盐 渍化农田 Different salinized stages | 有机碳 Soil organic carbon (g/kg) | 全氮 Total nitrogen (g/kg) | 全磷 Total phosphorus (g/kg) | C/N | C/P | N/P |
---|---|---|---|---|---|---|---|
大麦 Barley | CK | 7.82±1.40A | 0.86±0.19A | 1.37±0.12AB | 9.33±0.35B | 5.74±1.06A | 0.63±0.15A |
S1 | 8.18±0.76A | 0.87±0.10A | 1.49±0.14A | 9.50±0.73B | 5.55±0.64A | 0.59±0.11AB | |
S2 | 6.36±0.63B | 0.65±0.07B | 1.30±0.01B | 9.78±0.19AB | 4.91±0.48AB | 0.50±0.05AB | |
S3 | 5.04±0.25BC | 0.57±0.06BC | 1.27±0.05B | 8.98±0.51B | 4.00±0.33BC | 0.45±0.06BC | |
S4 | 4.22±0.36C | 0.40±0.04C | 1.30±0.04B | 10.50±0.33A | 3.23±0.24C | 0.31±0.02C | |
苜蓿 Alfalfa | CK | 5.33±0.39ABC | 0.52±0.06AB | 1.61±0.17A | 10.31±0.31A | 3.32±0.10B | 0.32±0.00BC |
S1 | 6.30±0.73A | 0.62±0.08A | 1.66±0.06A | 10.25±0.93A | 3.79±0.44AB | 0.37±0.04B | |
S2 | 5.83±0.25AB | 0.63±0.05A | 1.38±0.11B | 9.25±0.35B | 4.24±0.25A | 0.46±0.03A | |
S3 | 4.76±1.04BC | 0.47±0.10B | 1.39±0.10B | 10.09±0.44AB | 3.40±0.53B | 0.34±0.05BC | |
S4 | 4.22±0.36C | 0.40±0.04B | 1.30±0.04B | 10.50±0.33A | 3.23±0.24B | 0.31±0.02C |
图1 2种作物地不同盐渍化阶段农田不同土层养分含量变化 注:不同大写字母表示同土层不同盐渍化阶段间差异显著,小写字母表示同盐渍化阶段不同土层间差异显著(P<0.05)
Fig.1 Nutrient contents of different soil layers in different salinization stages of the two crop fields Note: Different uppercase letters indicate significant differences between different salinized stages with the same soil layers, and different lowercase letters indicate significant differences between the same soil layers salinized stages with different salinized stages (P<0.05)
作物 Crop | 土层 Soil layer (cm) | 盐渍化阶段 Salinized stage | C/N | C/P | N/P |
---|---|---|---|---|---|
苜蓿 Alfalfa | 0~10 | CK | 10.38±0.25Aa | 3.56±0.44Aa | 0.34±0.05ABa |
S1 | 10.64±0.31Aa | 3.81±0.42Aa | 0.36±0.03ABa | ||
S2 | 9.23±1.23Aa | 4.22±0.86Aa | 0.47±0.13Aa | ||
S3 | 9.90±1.18Aa | 3.60±0.56Aa | 0.37±0.08ABa | ||
S4 | 10.36±0.92Aa | 3.36±0.26Aa | 0.33±0.03Ba | ||
10~20 | CK | 10.35±0.86Aa | 3.50±0.33ABa | 0.34±0.01ABa | |
S1 | 10.48±0.56Aa | 3.84±0.52ABa | 0.37±0.03ABa | ||
S2 | 10.02±1.67Aa | 4.22±0.12Aa | 0.43±0.09Aa | ||
S3 | 10.68±0.25Aa | 3.38±0.80ABa | 0.32±0.07Ba | ||
S4 | 10.74±0.59Aa | 3.27±0.35Ba | 0.30±0.02Ba | ||
20~40 | CK | 10.13±0.37Aa | 2.81±0.70BCa | 0.28±0.08Ba | |
S1 | 9.76±1.82Aa | 3.67±0.75ABCa | 0.39±0.14ABa | ||
S2 | 8.98±1.57Aa | 4.40±0.60Aa | 0.50±0.12Aa | ||
S3 | 9.85±0.35Aa | 3.15±0.21Ca | 0.32±0.02Ba | ||
S4 | 10.46±0.14Aa | 3.06±0.17Ca | 0.29±0.02Ba | ||
大麦 Barley | 0~10 | CK | 8.74±0.93Ba | 6.37±1.69Aa | 0.74±0.27Aa |
S1 | 9.28±0.80ABa | 5.17±1.90ABa | 0.57±0.27ABa | ||
S2 | 9.79±0.08ABa | 5.29±0.46ABa | 0.54±0.05ABa | ||
S3 | 9.33±0.29ABa | 3.99±0.33Ba | 0.43±0.04ABa | ||
S4 | 10.36±0.92Aa | 3.36±0.26Ba | 0.33±0.03Ba | ||
10~20 | CK | 9.72±0.18ABa | 4.32±0.56ABa | 0.45±0.07ABa | |
S1 | 9.98±0.36ABa | 5.94±1.87ABa | 0.60±0.20Aa | ||
S2 | 9.65±0.50ABa | 4.89±0.39Aa | 0.51±0.03Aa | ||
S3 | 8.89±1.19Ba | 3.70±0.16Ba | 0.42±0.08ABa | ||
S4 | 10.74±0.59Aa | 3.27±0.35Ba | 0.30±0.02Ba | ||
20~40 | CK | 9.55±0.18ABCa | 6.54±2.06Aa | 0.69±0.23Aa | |
S1 | 9.24±1.35BCa | 5.54±1.77Aa | 0.61±0.22Aa | ||
S2 | 9.91±0.12ABa | 4.55±1.11ABa | 0.46±0.12ABa | ||
S3 | 8.71±0.49Ca | 4.31±0.83ABa | 0.50±0.12ABa | ||
S4 | 10.46±0.14Aa | 3.06±0.17Ba | 0.29±0.02Ba |
表2 2种作物地不同盐渍化阶段不同土层土壤养分化学计量比特征
Tab.2 Ecological stoichiometry of Soil C, N and P of different soil layer in different salinized stages in two farmland
作物 Crop | 土层 Soil layer (cm) | 盐渍化阶段 Salinized stage | C/N | C/P | N/P |
---|---|---|---|---|---|
苜蓿 Alfalfa | 0~10 | CK | 10.38±0.25Aa | 3.56±0.44Aa | 0.34±0.05ABa |
S1 | 10.64±0.31Aa | 3.81±0.42Aa | 0.36±0.03ABa | ||
S2 | 9.23±1.23Aa | 4.22±0.86Aa | 0.47±0.13Aa | ||
S3 | 9.90±1.18Aa | 3.60±0.56Aa | 0.37±0.08ABa | ||
S4 | 10.36±0.92Aa | 3.36±0.26Aa | 0.33±0.03Ba | ||
10~20 | CK | 10.35±0.86Aa | 3.50±0.33ABa | 0.34±0.01ABa | |
S1 | 10.48±0.56Aa | 3.84±0.52ABa | 0.37±0.03ABa | ||
S2 | 10.02±1.67Aa | 4.22±0.12Aa | 0.43±0.09Aa | ||
S3 | 10.68±0.25Aa | 3.38±0.80ABa | 0.32±0.07Ba | ||
S4 | 10.74±0.59Aa | 3.27±0.35Ba | 0.30±0.02Ba | ||
20~40 | CK | 10.13±0.37Aa | 2.81±0.70BCa | 0.28±0.08Ba | |
S1 | 9.76±1.82Aa | 3.67±0.75ABCa | 0.39±0.14ABa | ||
S2 | 8.98±1.57Aa | 4.40±0.60Aa | 0.50±0.12Aa | ||
S3 | 9.85±0.35Aa | 3.15±0.21Ca | 0.32±0.02Ba | ||
S4 | 10.46±0.14Aa | 3.06±0.17Ca | 0.29±0.02Ba | ||
大麦 Barley | 0~10 | CK | 8.74±0.93Ba | 6.37±1.69Aa | 0.74±0.27Aa |
S1 | 9.28±0.80ABa | 5.17±1.90ABa | 0.57±0.27ABa | ||
S2 | 9.79±0.08ABa | 5.29±0.46ABa | 0.54±0.05ABa | ||
S3 | 9.33±0.29ABa | 3.99±0.33Ba | 0.43±0.04ABa | ||
S4 | 10.36±0.92Aa | 3.36±0.26Ba | 0.33±0.03Ba | ||
10~20 | CK | 9.72±0.18ABa | 4.32±0.56ABa | 0.45±0.07ABa | |
S1 | 9.98±0.36ABa | 5.94±1.87ABa | 0.60±0.20Aa | ||
S2 | 9.65±0.50ABa | 4.89±0.39Aa | 0.51±0.03Aa | ||
S3 | 8.89±1.19Ba | 3.70±0.16Ba | 0.42±0.08ABa | ||
S4 | 10.74±0.59Aa | 3.27±0.35Ba | 0.30±0.02Ba | ||
20~40 | CK | 9.55±0.18ABCa | 6.54±2.06Aa | 0.69±0.23Aa | |
S1 | 9.24±1.35BCa | 5.54±1.77Aa | 0.61±0.22Aa | ||
S2 | 9.91±0.12ABa | 4.55±1.11ABa | 0.46±0.12ABa | ||
S3 | 8.71±0.49Ca | 4.31±0.83ABa | 0.50±0.12ABa | ||
S4 | 10.46±0.14Aa | 3.06±0.17Ba | 0.29±0.02Ba |
作物 Crop | 项目 Index | TN | TP | C/N | C/P | N/P |
---|---|---|---|---|---|---|
苜蓿 Alfalfa | SOC | 0.939** | 0.675** | -0.256 | 0.763** | 0.682** |
TN | 0.575* | -0.569* | 0.783** | 0.824** | ||
TP | 0.001 | 0.045 | 0.017 | |||
C/N | -0.388 | -0.696** | ||||
C/P | 0.930** | |||||
大麦 Barley | SOC | 0.977** | 0.590* | -0.405 | 0.951** | 0.898** |
TN | 0.468 | -0.573* | 0.971** | 0.961** | ||
TP | 0.153 | 0.317 | 0.212 | |||
C/N | -0.534* | -0.683** | ||||
C/P | 0.979** |
表3 盐渍化农田土壤SOC、TN、TP含量与化学计量比的相关性
Tab.3 Correlation between soil SOC, TN, TP concentrations and soil stoichiometry in two salinized farmlands
作物 Crop | 项目 Index | TN | TP | C/N | C/P | N/P |
---|---|---|---|---|---|---|
苜蓿 Alfalfa | SOC | 0.939** | 0.675** | -0.256 | 0.763** | 0.682** |
TN | 0.575* | -0.569* | 0.783** | 0.824** | ||
TP | 0.001 | 0.045 | 0.017 | |||
C/N | -0.388 | -0.696** | ||||
C/P | 0.930** | |||||
大麦 Barley | SOC | 0.977** | 0.590* | -0.405 | 0.951** | 0.898** |
TN | 0.468 | -0.573* | 0.971** | 0.961** | ||
TP | 0.153 | 0.317 | 0.212 | |||
C/N | -0.534* | -0.683** | ||||
C/P | 0.979** |
作物地 Farmland | N、P含量及 化学计量比 Soil stoichiometry | 土壤含水量 Soil water content | 土壤孔隙电导率 Soil pore electrical conductivity | 土壤温度 Soil temperature | 土壤容重 Bulk density | 土壤黏粉粒 Clay particles |
---|---|---|---|---|---|---|
苜蓿地 Alfalfa field | SOC (mg/g) | 0.329 | -0.676** | 0.123 | -0.083 | 0.600* |
TN (mg/g) | 0.446 | -0.642** | 0.184 | -0.196 | 0.589* | |
TP (mg/g) | -0.244 | -0.623** | -0.068 | -0.348 | 0.833** | |
C/N | -0.457 | 0.238 | -0.255 | 0.370 | -0.284 | |
C/P | 0.655** | -0.392 | 0.202 | 0.123 | 0.097 | |
N/P | 0.687** | -0/379 | 0.224 | -0.066 | 0.161 | |
大麦地 Barley field | SOC (mg/g) | -0.527* | -0.732** | -0.257 | -0.532* | 0.196 |
TN (mg/g) | -0.442 | -0.738** | -0.160 | -0.563* | 0.172 | |
TP (mg/g) | -0.409 | -0.296 | -0.676** | -0.513 | 0.320 | |
C/N | -0.134 | 0.550* | -0.225 | 0.286 | -0.145 | |
C/P | -0.451 | -0.754** | -0.063 | -0.428 | 0.142 | |
N/P | -0.346 | -0.736** | 0.006 | -0.459 | 0.124 |
表4 盐渍化农田土壤环境因子与SOC、TN、TP化学计量特征的相关性
Tab.4 Correlation between soil environmental factors and soil stoichiometry in two salinized farmlands
作物地 Farmland | N、P含量及 化学计量比 Soil stoichiometry | 土壤含水量 Soil water content | 土壤孔隙电导率 Soil pore electrical conductivity | 土壤温度 Soil temperature | 土壤容重 Bulk density | 土壤黏粉粒 Clay particles |
---|---|---|---|---|---|---|
苜蓿地 Alfalfa field | SOC (mg/g) | 0.329 | -0.676** | 0.123 | -0.083 | 0.600* |
TN (mg/g) | 0.446 | -0.642** | 0.184 | -0.196 | 0.589* | |
TP (mg/g) | -0.244 | -0.623** | -0.068 | -0.348 | 0.833** | |
C/N | -0.457 | 0.238 | -0.255 | 0.370 | -0.284 | |
C/P | 0.655** | -0.392 | 0.202 | 0.123 | 0.097 | |
N/P | 0.687** | -0/379 | 0.224 | -0.066 | 0.161 | |
大麦地 Barley field | SOC (mg/g) | -0.527* | -0.732** | -0.257 | -0.532* | 0.196 |
TN (mg/g) | -0.442 | -0.738** | -0.160 | -0.563* | 0.172 | |
TP (mg/g) | -0.409 | -0.296 | -0.676** | -0.513 | 0.320 | |
C/N | -0.134 | 0.550* | -0.225 | 0.286 | -0.145 | |
C/P | -0.451 | -0.754** | -0.063 | -0.428 | 0.142 | |
N/P | -0.346 | -0.736** | 0.006 | -0.459 | 0.124 |
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