黄土丘陵区生物结皮对土壤可蚀性的影响

ISWC OpenIR > 水保所知识产出(1956---)

	黄土丘陵区生物结皮对土壤可蚀性的影响
其他题名	Effects of biological soil crust on soil erodibility in Hilly Loess Plateau Region of Northwest
	高丽倩; 赵允格; 秦宁强; 张国秀
	2012
发表期刊	应用生态学报
卷号	24 期号:01 页码:105-112
摘要	在采样分析生物结皮对土壤理化属性影响的基础上,采用EPIC模型估算与模拟降雨试验相结合的方法,研究了黄土丘陵区不同生物量、不同土壤质地和不同季节的生物结皮对土壤可蚀性(K值)的影响.结果表明:生物结皮显著降低了土壤可蚀性,生物结皮层土壤可蚀性较下层土壤降低17%;土壤可蚀性随生物结皮生物量的增加呈降低趋势,藓结皮土壤可蚀性K值较藻结皮土壤降低21%;生物结皮土壤可蚀性在不同季节因其生物活性不同而存在差异,雨季中显著高于雨季前和雨季末;不同质地土壤上生物结皮对可蚀性的影响不同,可蚀性K值为砂壤>粉壤>砂土;模拟降雨条件下测定表明,生物结皮的发育使土壤可蚀性较对照(下层5～10cm土壤)降低约90%. 更多还原
其他摘要	Based on the analysis of the effects of biological soil crust ( biocrust) in re-vegetated grasslands on soil physical and chemical properties，and by using EPIC estimation model in combining with simulated rainfall trials，this paper studied the effects of biocrust with different biomass and different soil texture on the soil erodibility ( K value) in Hilly Loess Plateau Region of Northwest China in different seasons． The results showed biocrust could significantly decrease soil erodibility， with the K value of biocrust soil decreased by about 17%，compared with subsoil． The soil erodibility decreased with the increasing biomass of biocrust． The K value of moss crust soil decreased by 21%，compared with cyanobacteria crust soil． The erodibiliy of biocrust soil differed with different seasons，being significantly higher in rainy season than before or after the rainy season due to the differences in the biological activity of the biocrust organisms． The erodibilty of biocrust soil with different texture also varied significantly，with the K value in the order of sandy loam soil ＞ silt soil ＞ sandy soil． The measurement under simulated rainfall showed that the development of biocrust could decrease the erodibility of biocrust soil by about 90%，compared with that of the subsoil ( 5－10 cm) ．
关键词	生物结皮 Biological Soil Crust 生物量 Biomass 土壤质地 Soil Texture 土壤可蚀性 Soil Erodibility
语种	中文
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/5511
专题	水保所知识产出(1956---)
推荐引用方式 GB/T 7714	高丽倩,赵允格,秦宁强,等. 黄土丘陵区生物结皮对土壤可蚀性的影响[J]. 应用生态学报,2012,24(01):105-112.
APA	高丽倩,赵允格,秦宁强,&张国秀.(2012).黄土丘陵区生物结皮对土壤可蚀性的影响.应用生态学报,24(01),105-112.
MLA	高丽倩,et al."黄土丘陵区生物结皮对土壤可蚀性的影响".应用生态学报 24.01(2012):105-112.

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