Results 21 to 30 of about 2,461 (181)
Diversity of culturable endophytic fungi of common reed ( Phragmites australis) in coastal wetland [PDF]
, 2016 内生真菌在植物生长以及抵御环境胁迫过程中起着非常重要的生态作用.本研究从黄河三角洲滨海湿地1350个芦苇组织切片中分离得到318株内生真菌,通过对rDNA ITS的分型、测序及系统进化分析,研究了该地区芦苇植株根、茎、叶中可培养内生真菌的种类组成及在不同盐度、不同组织中的分布情况.根据序列相似性(以98%为阈值),共获得12个真菌分类操作单元(OTUs).在门级分类水平上,子囊菌门为绝对优势菌群,在各组织和站位中均有分布.芦苇根组织中分离得到的内生真菌OTU数相对较多 ...
张倩倩 +6 more
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Shuitu Baochi Xuebao, 2006 在贵阳市乌当区采集了9种母质（岩）上发育的土壤样品763个，分别测定了土壤的主要理化性质和主要重金属元素含量，通过对比分析表明不同母质（岩）发育的土壤理化性质和重金属含量都具有很大的差异。土壤理化性质的差异性主要表现为：石灰岩、红色粘土、老风化壳和页岩发育的土壤质地粘重。砂岩发育的土壤质地较轻，钙质紫色砂页岩、白云岩、砂页岩和河流冲积物发育的土壤质地适中；石灰岩、白云岩和钙质紫色砂页岩发育的土壤pH值为中性至微碱性。河流冲积物发育的土壤pH值为中性，其余5种母质（岩）发育的土壤pH值为酸性至强酸性 ...
何腾兵 +5 more
doaj +2 more sources
Shuitu Baochi Xuebao, 2003 植被的分布格局与土壤性质空间异质性密切相关。对降水小于200mm地区的沙坡头无灌溉条件下流沙固定过程中土壤性质的空间变化进行了研究。结果表明,随固沙植物群落的演变和土壤成土环境的改善与生物地球化学循环过程的加强,土壤性质发生了显著的变化:(1)固沙区土壤机械组成中粘粒(<0.001mm)含量、土壤水溶性盐(EC电导率)、pH、有机质和全氮含量都较流沙区有很大提高,且差异显著(p<0.05);固沙区土壤剖面性质的改变主要发生在结皮层和0～5cm的表层(topsoil),受表层土壤发育的影响5 ...
贾晓红 李新荣 王新平 樊恒文 赵金龙
doaj +2 more sources
Shuitu Baochi Xuebao, 2021 团聚体是土壤的基本结构单位，其稳定性是评价土壤质量的重要指标。以南亚热带地区不同母质（石灰岩、第四纪红黏土、砂页岩）发育的土壤作为研究对象，采用湿筛法和LB法测定不同母质发育土壤团聚体稳定性特征。结果表明：（1）随着土层深度的增加，土壤容重呈上升趋势，而孔隙度、有机质和游离氧化铁含量呈下降趋势。砂页岩母质发育的土壤有机质含量最高，为22.44~42.97 g/kg。石灰岩和第四纪红黏土母质发育的土壤以黏粒（40.93%，42.51%）和粉粒（41.69%，42.31%）为主 ...
冷暖 +7 more
doaj
Characteristics of Soil Saturated Hydraulic Conductivity and Its Influencing Factors at Different Landscape Positions in a Small Peak-Cluster Depression Watershed of the Karst Region [PDF]
[Objective] Peak-cluster depression is one of the important karst landform types. Exploring the influence of different landscape positions on soil saturated hydraulic conductivity (Ks) can provide a reference for further understanding of the hydrological
HOU Senzheng +5 more
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Shuitu Baochi Xuebao, 2002 土壤是农业生存之本,土壤质量是联系土壤管理与可持续农业的桥梁与纽带。介绍了土壤质量的概念及其发展,在客观地分析我国土壤质量现状的基础上,提出土壤管理必须建立在土壤质量的基础上并兼顾土壤的生产性、稳定性、持续性、生存性及社会的可接受性,才能实现农业的可持续发展。
张海林
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The Long-term Variations and Influencing Factors of Soil Saturated Hydraulic Conductivity in Terraces on the Loess Plateau [PDF]
[Objective] The long-term variations of soil saturated hydraulic conductivity (Ks) and its primary controlling factors in terraces on the Loess Plateau were explored. [Methods] Terraces were selected for three land use types, i.e.
CHANG Heng +6 more
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Research progress in cleaning and efficient remediation of heavy, toxic, lead-contaminated soil [PDF]
, 2022 With the rapid development of industrialization and human civilization, the soil polluted by heavy, toxic lead is becoming increasingly severe worldwide. Thus, it is imperative to control soil pollution due to lead. In this paper, the background, status,
Guang-hua LU +5 more
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Greenhouse gas emissions from croplands of China [PDF]
, 2003 China possesses cropland of 1.33 million km 2. Cultivation of the cropland not only altered the biogeochemical cycles of carbon (C) and nitrogen (N) in the agroecosystems but also affected global climate.
Bohan, Liao +13 more
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Comparison of Infiltration Capacity Between Grassland of Different Time Lengths of Abandonment and Sea Buckthorn Land in Inner Mongolia [PDF]
, 2023 [Objective] The effect of different vegetation covers on soil infiltration capacity in Inner Mongolia was analyzed in order to provide a theoretical basis for ecological restoration and vegetation allocation of the region.
Cheng Shuai +5 more
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