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Distribution, relationship, and risk assessment of toxic heavy metals in walnuts and growth soil
toxic heavy metals walnuts growth soil
2023/6/5
Walnut is one the most popular nuts worldwide and contains various mineral nutrients. Little is known, however, about the relationship between toxic heavy metals in walnuts and growth soil. In this st...
以咖啡壳沤制物、 腐殖土及森林土为原料配制成不同基质, 通过对基质的容重、 总孔隙度、 碱解N、 速 效P、 速效K、 有机质、 pH值及EC值8个理化性状测定及成苗率观测, 分析其理化性状及其对长蕊甜菜成苗率 的影响。
通过对金沙江头塘小流域3种典型林分类型的土壤进行入渗试验研究, 从而进行金沙江头塘小流域人工 生态林保水保土的生态效益比较和综合评价, 以期为金沙江流域的水土保持提供强有力的理论依据。 结果表明, 各林分对水分的涵养、 调节能力的大小为云南松林>银荆林>旱冬瓜林>荒草地; 对影响土壤入渗的因子作相关分 析和主成分分析, 结果都可以得到土壤的有机质含量、 总孔隙度、 容重和土壤颗粒对土壤的入渗性能决...
樟子松是我国 “三北冶 地区主要的固沙造林树种, 研究其如何影响着风沙土肥力变化过程具有现实意义。 本文选择8-56年林龄的樟子松固沙林, 采用常规方法测定了不同林龄下土壤养分含量和酶活性, 以分析樟子松 人工林对风沙土养分和酶活性的影响。
采用室内盆栽试验, 分别在燥红壤中掺入稻壳 (DK)、 烟秆 (YG)、 橡胶木 (XJ) 3 种不同的生物炭, 每种生物炭共设置5个处理梯度 (按炭土比1%、3%、5%、7%、10%添加), 外加无生物炭添加的对照CK共 16个处理, 研究生物炭对燥红壤土壤肥力与番茄生长的影响。 结果表明, 稻壳炭10%处理土壤全磷较CK提升 207郾15%;
针对沼渣在桉树集约化经营中的合理利用, 为了解桉树人工林种植在氮素生物地球化学循环中的作用, 在尾巨桉人工林地布设了沼渣、 桉树专用肥和对照CK共3组施肥试验, 采用实时荧光定量和变性梯度凝胶电泳 方法研究沼渣施肥对桉树人工林土壤氨氧化古菌 (ammonia鄄oxidizingarchaea, AOA) 丰度和群落结构的影响。
为了探讨坡位对思茅松人工林土壤微生物量碳的影响, 以12年生的思茅松人工林为研究对象, 对不同坡 位0-50cm土层土壤微生物量碳含量及密度进行调查。 结果表明: 思茅松人工林土壤有机碳质量分数随着海拔的 升高而增加, 土壤微生物量碳主要集中于0-10cm的土壤层,0-50cm土层深度的土壤微生物量碳的平均含量下 坡位>中坡位>上坡位; 在0-30cm土壤层, 土壤微生物量碳占土壤有机碳的比值随着...
外源磷添加对茶园土壤磷有效性和微生物量碳、氮、磷的影响
茶园 土壤微生物生物量 外源磷 速效磷
2019/9/19
贵州茶园土壤普遍缺磷，土壤微生物可活化土壤难溶性磷提高植物磷素养分，对茶园土壤肥力和土壤养分的有效性具有重要的指示意义。研究了6种施磷处理（不施磷，施25mg/kg、50mg/kg、75mg/kg、100mg/kg、150mg/kg KH2PO4）对贵州湄潭县4个茶园表层土壤（0-20cm）土壤速效磷含量及微生物量碳、氮、磷的影响。
Application of a model for the evaluation of the “Visitor Satisfaction” in a nature reserve of South Italy
protected areas recreational services local development assessment preferences Sicily
2017/6/26
The protected natural area represents an important resource because from it sustainable and long-lasting social and economic development processes can start. In fact, the conservation of biodiversity ...
Comparison of the growth of fast-growing poplar and willow in two sites of Central Kazakhstan
short rotation coppice Salicaceae Central Asia plantation biometric and soil parameters
2017/6/26
In temperate climatic conditions, plantations of poplar and willow species provide sustainable production of biomass. Short rotation coppice plantations on agricultural lands have a great potential to...
Effect of the skid trail cross section and horizontal alignment on forest soil physical properties
soil bulk density ground-based skidding cross slope Civil3D software Bahramnia forest
2017/6/26
Horizontal alignment and cross section characteristics of a skid trail in a ground-based skidding system including curves, wheel ruts and cross slope can impact on the forest soil. In this study the m...
The influence of deforestation and anthropogenic activities on runoff generation
rainfall-runoff model forest sediment Iand use Talar watershed Iran
2018/3/6
In recent decades, due to rapid human population increases and in its results, destructive effects of anthropogenic
activities on natural resources have become a great challenge. Land use and vegetat...
Research on forest terrain roughness as a source of dynamic action on the vehicle
forest soils micro-profile correlation analysis power spectral density
2018/3/6
The issue of terrain conditions is very complex and its description is approached from different perspectives and with
different objectives. Because it consists of the gathering of basic information ...
Estimation of diameter at breast height from mobile laser scanning data collected under a heavy forest canopy
mobile mapping system clustering point cloud circle fit
2018/3/6
Mobile laser scanning (MLS) is time-efficient technology of geospatial data collection that proved its ability to provide
accurate measurements in many fields. Mobile innovation of the terrestrial la...
Effect of black walnut (Juglans nigra) on the understorey vegetation – a case study of South Moravian forests (Czech Republic)
Ellenberg’s indicator values herb layer indigenous species ordination relevés
2017/4/6
The article analyses the influence of black walnut on forest phytocoenosis in South Moravian forests and assesses how its representation may affect the understorey vegetation of the forest ecosystems....