Through experiments of static degradation and dynamic soil column , both purification efficiency of phenol and influences of reed wetland soil were studied 摘要用动态土柱法和静态降解法研究了芦苇湿地土壤对苯酚的净化效果及其影响因素。
Due to a large population and the scarcity of soil resources , worldwide attention has heavily focused on the soil fertility changes in china , since early 1980s 中国人口众多,土壤资源有限,其80年代初以来的农地土壤肥力变化备受世人关注。
The yearly burning raised soil pll , available n and k and reduced soil organic mater , total n , total p , available p and ca 连年火烧迹地土壤ph值升高,有机质、全氮、全磷、速效磷、钙的含量均有所下降,而有效氮、有效钾的含量有所增加。
The traditional methods of describing soil properties are on the whole qualitatively soil classification , not researching soil spatial variability quantitatively 传统描述土壤空间异质性的方法基本上是定性地土壤分类,而不是定量地研究土壤空间变异。
On one hand , the lowland soil is kept flooded throughout rice growing season , therefore , they are very much diversified by the properties of the different soils from which they originated 一方面,湿地土壤在稻作季中始终保持淹水,它们比原来的土壤有绝然不同的性质。
Maximum yield research is the study of one of more variables and their interactions in a multidisciplinary system that strives for the highest yield possible for the soil and climate of the research site 最高产量研究是以多学科系统研究一个或数个变量及其交互作用,令研究所在地土壤和气候条件下的可能产量最高。
In the eroded infertile soils of the yangtze river watershed there was an obstacle to the use of “ soil reservoir ” , that is , the storage capacity of “ soil reservoir ” had been severely lost because of soil erosion 长江流域的侵蚀劣地“土壤水库”需要承受更多的拦蓄雨水任务,但这些侵蚀劣地土壤区存在着调用“土壤水库”的障碍。
Fire raised soil ph , but the soil ph after low and moderate intensity fires returned to the lever before burning faster than after high intensity fires . the changes of soil organic matter and ph were similar after fires 火烧使十壤ph值升高,但随着时间的推移,低、中强度火烧迹地土壤的ph值恢复得较快,高强度火烧迹地土壤的ph值恢复得较慢。
She didn t feel really smart , it wasn t interesting . and she did feel the peculiar , withering coldness under it all ; like the soil of labrador , which his gay little flowers on its surface , and a foot down is frozen 她很觉得那种社会的下去,有一种怪异的令人畏缩的冷酷象拉布拉多地土壤一般,地面上生长着一些愉快的小花朵,可是一尺以下却是冰冻的。
4 . soil respiration emission of co2 at testing woodland and uncovered land changes sensitively with the three factors , such as soil temperature , vegetation and humidity . but it is mainly controlled by soil temperature , secondly humidity and vegetation 对林地和裸地土壤coz释放量观测中,温度是影响土壤coz释放量的主要因子,其次为土壤湿度和地表植被。