| 引用本文: | 孟婷婷,王欢元,杨亮彦,等.黄土丘陵区退耕还林草对深层土壤水分的影响[J].灌溉排水学报,0,():-. |
| Meng Tingting,WANG Huanyuan,YANG Liangyan,et al.黄土丘陵区退耕还林草对深层土壤水分的影响[J].灌溉排水学报,0,():-. |
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| 黄土丘陵区退耕还林草对深层土壤水分的影响 |
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孟婷婷1, 王欢元1, 杨亮彦1, 石磊1,2,3,4,5
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1.陕西省土地工程建设集团有限责任公司 西安;2.陕西地建土地工程技术研究院有限责任公司北京;3.自然资源部退化及未利用土地整治工程重点实验室 西安;4.陕西省土地整治工程技术研究中心 西安;5.自然资源部土地工程技术创新中心 西安
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| 摘要: |
| 【目的】为弄清黄土丘陵区退耕还林草植被恢复对深层土壤水分的影响。【方法】采用室外调查和室内检测的方法,研究了黄土丘陵区园则沟小流域坡耕地,草地和枣林0~1000cm剖面土壤水分含量和深层(300cm~1000cm)耗水量。【结果】(1)0~1000cm剖面,土壤含水量为枣林＜草地＜坡耕地。0~200cm土层,坡耕地、草地和枣林土壤含水量均呈现先增加后减少的趋势,均值分别为11.91%,11.23%和9.99%；300cm~1000cm剖面,土壤含水量缓慢下降趋于稳定,均值分别为11.80%、11.72%和10.05%。(2)300cm~1000cm剖面,土壤储水量坡耕地>草地>枣林,均值分别为149.23mm、146.22mm和121.91mm；各土层坡耕地和草地土壤储水量显著大于枣林(p<0.05),但是坡耕地储水量和草地土壤储水量无显著差异性。(3)300cm~1000cm剖面,枣林存在明显的深层土壤耗水量并显著高于草地(p<0.05),枣林耗水量范围为21.67mm~32.97mm,均值为27.39mm,草地耗水量范围为-4.47mm~10.32mm,均值为3.07mm。(4)土壤深层含水量与粘粒呈显著正相关关系,与砂粒呈负的弱相关关系,与有机碳含量呈正的弱相关关系。【结论】枣林存在明显的深层土壤消耗量,且显著高于草地；草地在深层土壤虽然也出现土壤水分消耗,但是消耗量很低。 |
| 关键词: 退耕还林草;深层水分;水分消耗量;草地;枣林 |
| DOI： |
| 分类号:s15 |
| 基金项目: |
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| Effects of Returning Cropland to Forest and Grassland on Deep Soil Moisture in Loess Hilly Region |
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Meng Tingting,WANG Huanyuan,YANG Liangyan,et al
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Shaanxi Provincial Land Engineering Construction Group Co., Ltd
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| Abstract: |
| 【Background】【Objective】The objective is to investigate the effect of vegetation restoration on deep soil moisture in the loess hilly region.【Method】The soil water content and deep water consumption (300cm~1000cm) of sloping farmland, grassland and jujube forest in the small watershed of Yuanzegou watershed in the loess hilly region were studied by using outdoor survey and indoor survey..【Result】(1) In the 0-1000cm profile, the soil water content was jujube orchard < grassland < sloping farmland. In 0-200cm soil layer, the soil water content of sloping farmland, grassland and jujube orchard increased first and then decreased, with an average value of 11.91%, 11.23% and 9.99%, respectively. From 300cm to 1000cm, soil water content decreased slowly and tended to be stable, with an average value of 11.80%, 11.72% and 10.05%, respectively. (2) From 300cm to 1000cm, the soil water storage was in slope farmland > grassland >jujube orchard, with the mean values of 149.23mm, 146.22mm and 121.91mm, respectively. The soil water storage of sloping farmland and grassland was significantly higher than that of jujube forest (P <0.05), but there was no significant difference between sloping farmland and grassland.(3) In the 300cm-1000cm profile, the deep soil water consumption of jujube orchard was significantly higher than that of grassland (P <0.05). The water consumption of jujube forest ranged from 21.67mm to 32.97mm, with an average of 27.39mm, and that of grassland ranged from -4.47mm to 10.32mm, with an average of 3.07mm.(4) The deep soil moisture content is positively correlated with clay, weakly negatively with sand, and positively and weakly correlated with organic carbon content.【Conclusion】The deep soil consumption in jujube orchard was significantly higher than that in grassland. Although the soil water consumption of grassland also occurs in deep soil, but the consumption is very low. |
| Key words: Return farmland to forests and grasslands; Deep moisture; Water consumption; grassland; Jujube orchard. |
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