| 柴达木盆地尕斯库勒湖区盐生植物改良土壤盐渍化效应及其贡献评价 |
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| 引用本文： | 余冬梅,祁兆鑫,胡夏嵩,刘亚斌,王建萍,李姜瑶.柴达木盆地尕斯库勒湖区盐生植物改良土壤盐渍化效应及其贡献评价[J].盐湖研究,2020,28(4):91-101. |
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| 作者姓名： | 余冬梅 祁兆鑫 胡夏嵩 刘亚斌 王建萍 李姜瑶 |
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| 作者单位： | 中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海 西宁 810008;青海省盐湖地质与环境重点实验室,青海 西宁 810008;中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海 西宁 810008;青海大学,青海 西宁 810016 |
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| 基金项目： | 国家重点研发计划项目(2018YFC0406605); 国家自然基金面上项目(41471454,41671521); 青海省创新平台项目(2018-ZJ-T10,2018-ZJ-T03); 第二次青藏高原综合科学考察项目(2019QZKK0805)共同资助 |
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| 摘 要： | 在柴达木盆地尕斯库勒盐湖区,通过对芦苇、赖草、海韭菜、无脉苔草、洽草、盐地风毛菊、羊齿天门冬、小花棘豆和白刺9种盐生植物生长区土壤容重、含水量、全盐量、pH值、全氮、速效钾、速效磷进行测试分析,研究其对盐渍化土壤的改良效果。试验结果表明:9种盐生植物均可降低土壤容重、全盐量和pH值,提高土壤含水量,其平均全盐量较裸地降低了3.79%~85.40%,平均降低幅度为44.99%,小花棘豆降低土壤容重相对较为显著(17.39%),无脉苔草相对较差(1.37%)；盐地风毛菊降低土壤pH值的能力相对较强(5.11%),羊齿天门冬相对较弱；赖草提高土壤含水量相对较为显著(26.05%),白刺相对较差(1.85%)。9种盐生植物可不同程度增加土壤全氮含量,且随取样深度增加全氮含量呈逐渐降低的变化趋势；9种盐生植物坡面地表以下垂直方向0~20 cm土体速效磷含量表现出增加趋势,其中在地表以下20~50 cm位置速效磷含量增加相对较为显著,土体速效磷含量增加的程度由大至小依次为:小花棘豆、赖草、无脉苔草、海韭菜、白刺、羊齿天门冬、芦苇、洽草和盐地风毛菊。研究结果对于利用盐生植物防治土壤盐渍化,以及进一步提高土壤可持续利用有实际价值。
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| 关 键 词： | 柴达木盆地 尕斯库勒盐湖区 盐生植物 土壤盐渍化 贡献评价 |
| 收稿时间： | 2018/6/8 0:00:00 |
| 修稿时间： | 2020/2/25 0:00:00 |
Effects and Contribution Assessment of Halophytes in Soil Salinization Improvement of Gas Hure Lake Region in Qaidam Basin |
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| YU Dong-mei,QI Zhao-xin,HU Xia-song,LIU Ya-bin,WANG Jian-ping,LI Jiang-yao.Effects and Contribution Assessment of Halophytes in Soil Salinization Improvement of Gas Hure Lake Region in Qaidam Basin[J].Journal of Salt Lake Research,2020,28(4):91-101. |
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| Authors: | YU Dong-mei QI Zhao-xin HU Xia-song LIU Ya-bin WANG Jian-ping LI Jiang-yao |
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| Institution: | Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes, Chinese Academy of Sciences,Xining,810008,China;Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes,Xining,810008,China;Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes, Chinese Academy of Sciences,Xining,810008,China;Department of Geological Engineering, Qinghai University,Xining,810016,China |
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| Abstract: | SIn this study, Gaskuler Salt Lake region in Chaidamu basin has been selected as the test site. By determining salt content and nutrient content in soil containing Phragmites australis Trin., Leymus secalinus(Georgi)Tzvel., Triglochin maritimum Linn., Carex enervis C.A.Mey., Koeleria cristata(L.)Pers., Saussurea salsa(Pall.)Spreng., Asparagus filicinus Ham., Oxytropis glabra DC. And Nitraria tangutorum Bobr., the distribution properties of soil bulk density, moisture content, pH value, total nitrogen content, rapidly available phosphorus content, rapidly available phosphorus content, rapidly available potassium have been identified. Results show the nine species are capable of reducing soil bulk density, salt content and pH value, increasing moisture content, and mean total salt content in soil containing the nine species has reduce by 3.79%~85.40%, and the mean reduction percentage is44.99%; Oxytropis glabra DC plays an excellent role in reducing soil bulk densitu(17.39%), Carex enervis C.A.Mey is relatively lower(1.37%); Saussurea salsa(Pall.)Spreng. has an excellent role in reducing pH value(5.11%), Asparagus filicinus Ham. is relatively weaker in reducing pH value(1.37%); Leymus secalinus(Georgi)Tzvel. is capable of increasing soil moisture content and the corresponding percentage is 26.05% and Nitraria tangutorum Bobr. is relatively weak(1.85%). Generally, Halophyte can increase nitrogen content in soil, and with the sampling depth increasing, nitrogen content in soil decreases gradually. At 0-20cm beneath the ground surface, rapid available phoshporus rapidly available phosphorus from significant is Oxytropis glabra DC, Leymus secalinus(Georgi)Tzvel., Carex enervis C.A.Mey., Triglochin maritimum Linn., Nitratia tangutorum Bobr., Asparagus filicinus Ham., Phragmites anstralis Trin., Koeleria., Triglochin maritimum Linn., Nitratia tangutorum Bobr., Asparagus filicinus Ham., Phragmites australis Trin., Koeleria cristata(L.)Pers., and Saussurea salsa(Pall.)Spreng. TheSresearch findingsScanSprovide theoretical basisSforSpreventingSsoilSsalinization through halophytes as well as for the sustainable utilization of soil in the study area. |
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| Keywords: | Qaidam Basin Gaskuler Lake Halophytes salinization Contribution evaluation |
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