Results 71 to 80 of about 552 (151)
Shuitu Baochi Xuebao, 2016 为了解湘西州植烟土壤pH特征，于2015年采集湘西烟区1 242个土壤样本，采用传统统计学和地统计学方法分析了湘西州植烟土壤pH区域分布和空间分布特征及其影响因素。结果表明：（1）湘西烟区植烟土壤pH变幅为4.17～8.17，平均值为6.12，变异系数为18.30%；处于植烟土壤pH适宜范围内(pH为5.5～7.0)的样本占34.06%，pH小于5.0的植烟土壤样本为20.77%，pH大于7.5的植烟土壤样本为18.20%；（2）7个主产烟县植烟土壤pH平均值在5.44～6.84 ...
邓小华 +6 more
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Determination of Soil Fluorine Speciation and Main Factors Affecting Tea Fluorine Content in Tea Gardens of Daba Mountain [PDF]
In recent years, the relationship between fluorine intake through tea drinking and human health has received significant attention. To investigate the effect of soil properties on tea fluorine, 64 sets of tea garden soil-tea samples were collected in ...
Boxin FENG +7 more
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野生动物学报, 2003 闽江是福建省的第一大江,流域面积约6.1万平方公里,占福建土地面积的50％,年平均径流量为620亿立方米,被誉为福建省的“母亲河”。闽江河口湿地西起长乐市猴屿镇,东至梅花镇,面积约30平方公里。从西向东依次分布有泥质、半泥质和沙质滩涂。闽江带来的泥沙长期在此淤积,形成广阔的滩涂和众多沙洲,水草茂盛 ...
刘伯锋
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Relationship between Available State and Forms of Selenium and Zinc in Farmland Soil of Luoyang City and Its Influencing Factors [PDF]
The form and available state of elements are important indexes to evaluate the activity of elements. Research on the relationship between the available state and form of selenium (Se) and zinc (Zn) in farmland soil is an important basis for accurate land
Jianchuan ZHOU +5 more
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Shuitu Baochi Xuebao, 2004 以四川省资阳市松涛镇的响水村小流域为研究背景,以地理信息系统为技术手段,研究了小流域尺度土壤养分的空间分布特征,并结合数理统计的分析方法,进一步探讨了土地利用对土壤养分的影响。结果表明:研究区域土壤表层养分含量均呈现较明显的空间分布格局,总趋势大都具有条带状和斑块状的特点,旱地、果园、裸地的土壤全氮、有机质普遍缺乏,特别是处于坡顶的裸地,应成为今后的控制重点,此外,旱地、果园的水溶态养分高值分布区也应给予高度重视。方差分析与均值比较表明:土地利用对全氮、有机质、全磷、水溶性磷含量都有显著影响(P全氮 ...
王洪杰 史学正 李宪文 于东升 孙维侠 曹志洪
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Research Progress on the Migration, Enrichment and Risk Assessment of Heavy Metals in a Soil-Grape System [PDF]
As potentially toxic elements, the pollution level of heavy metals in vineyard soils directly affects the ecosystem balance and human health. This study analyzes the current related literature, focusing on the characteristics of heavy metal content in ...
Chang LI +8 more
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Application of Energy Dispersive X-ray Fluorescence Spectroscopy in Analysis of Heavy Metals in Soil: A Review [PDF]
With the process of urbanization and industrialization, heavy metals enter the ecological environment through various pathways and accumulate in large quantities in the soil, causing potential risks to soil environmental health. In recent years, with the
Aosong JIANG, Longhua WU, Zhu LI
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Review of techniques and case studies for saline-alkali land amelioration in the coastal regions of China [PDF]
Soil salinization is one of the major challenges in agricultural production and ecological development. With the rapid development of China’s coastal areas, land resources are becoming increasingly scarce, creating an urgent need for the improvement and ...
Hang LYU +5 more
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Shuitu Baochi Xuebao, 2004 为了开发利用塔克拉玛干沙漠地下高矿化度咸水进行沙漠公路绿化,2003年在肖塘进行了高矿化度地下咸水灌溉实验。实验点选择在流动沙丘和丘间平地上,按照荒漠林土覆沙厚度差异和坡向不同,选择了9种不同的立地条件的实验点。样地中栽植梭梭、柽柳、盐穗木等3种植物。实验结果如下:(1)立地条件对植物生长的影响主要是通过其对水分和太阳辐射的差异分布而引起的;(2)不同植物种对于高矿化度的咸水灌溉适应性不同,适应性因土壤母质条件的差异而变化;(3)植物生长的不同阶段,生长限制因子不同,在成活时期水分因子是其限制因子 ...
李生宇 李红忠 雷加强 李丙文 徐新文 周宏伟
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Shuitu Baochi Xuebao, 2018 运用经典统计学和地统计学分析方法，探讨了江西省油菜种植区土壤碳氮磷生态化学计量特征的空间变异性及影响因素。结果表明：江西省油菜土壤有机碳（SOC）、全氮（TN）和全磷（TP）平均含量分别为16.99，1.44，0.50 g/kg，土壤C∶N、C∶P和N∶P平均值分别为12.28，38.31和3.27，土壤总体C∶N∶P为33.86∶2.88∶1，整体处于相对较低水平，表现出中等程度的变异性和空间自相关性，其空间变异特征受到结构性因素和随机性因素的共同影响，但受结构性因素影响更大。从空间分布规律看 ...
张晗 +5 more
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