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   土壤速效p 在 自然地理学和测绘学 分类中 的翻译结果: 查询用时:0.088秒
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土壤速效p
相关语句
  soil available p
    The content of soil available P and rapidly available K in subsoil in these two reforested patterns are lower than in farmland.
    两种退耕还林模式表层土壤速效P和速效K含量均低于农耕地。
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  “土壤速效p”译为未确定词的双语例句
    The change of SOM and rapidly available P in differ plot and differ layer were different.
    各样地不同土层的土壤有机质和土壤速效P含量变化趋势有所不同。
短句来源
    Among these soil nutrients, variation coefficient of available phosphorus is the highest. From the space distribution of available phosphorus, the content of available phosphorus is higher in the East near Taihu than in the West.
    土壤速效磷总体来说处于偏低水平,但是点与点的差距较大,从速效磷的空间分布情况来看,土壤速效P呈现出明显的地带性分布规律,在该地区西部的土壤速效P含量是低水平,而东部靠近太湖边上的土壤速效P含量是属于比较高或极高的水平。
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  soil available p
Surface soil available P under tree canopies was 34-50% higher than the corresponding soil away from canopies.
      
Phosphorus-based manure or compost application resulted in similar grain yields to those for N-based treatments but had significantly less soil available P level after 4 yr of application.
      
Although differences were not statistically significant, soil available P concentration tended to increase at early stages of liming for both plantations.
      
However, at the same levels of soil available P and K, field-grown tithonia consistently produced lower leaf P and K concentrations than that grown in hedges.
      
We quantified inputs from the atmosphere, dissolved and particulate-bound losses, throughfall and litterfall fluxes, standing crop litter and soil available P pools.
      
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Effects of fertilizer application of P and PK on soil properties and foliar nutrients of young

1991~1995年期间,在江西景德镇市低丘千枚岩和第4纪红土红壤上,研究了火炬松、湿地松幼林施肥(P和PK)对土壤性质和叶片养分的影响。结果表明:(1)2个施肥处理使火炬松和湿地松林土壤速效P含量提高,有机质等其它土壤肥力指标下降。施P肥加速了有机质矿化和林木对N的吸收;(2)2个施肥处理能提高湿地松林土壤细菌、真菌和纤维分解菌的数量,减少放线菌的数目,而施肥前期对好气固N菌、P细菌有促进作用,后期对其有抑制作用;(3)2个施肥处理能明显提高湿地松林土壤脲酶和过氧化氢酶活性,施肥前期磷酸酶活性受到抑制,施肥后期磷酸酶活性不再受抑,酶活性大大提高。P肥能提高蔗糖酶活性,而PK肥对蔗糖酶活性有抑制作用;(4)湿地松林施肥2年后,叶片养分有明显变化,P和PK处理提高了叶片Ca、Mg的含量,降低了N水平,而对P和K含量影响不大。

>=Top soil samples were studied using the Kriging interpolation method with GPS and GIS supporting. Chemical properties of soils were analyzed using standard methods.Horizontal change and distribution of Taihu typical area nutrient level were studied.Results of the research show that the soil organic matter content and soil available potassium content, both are generally moderate toward low , Over 71.6 % of the soil has orgnic matter ranging between 20 to 30 g/ kg, and over 73.74 % of soil available potassium...

>=Top soil samples were studied using the Kriging interpolation method with GPS and GIS supporting. Chemical properties of soils were analyzed using standard methods.Horizontal change and distribution of Taihu typical area nutrient level were studied.Results of the research show that the soil organic matter content and soil available potassium content, both are generally moderate toward low , Over 71.6 % of the soil has orgnic matter ranging between 20 to 30 g/ kg, and over 73.74 % of soil available potassium content between 55 to 90 mg/ kg. Among these soil nutrients, variation coefficient of available phosphorus is the highest.From the space distribution of available phosphorus, the content of available phosphorus is higher in the East near Taihu than in the West. Most of this area pH between 5.3 to 5.7 .The soils partial to acid.

通过GPS定位采取土样,标准方法的土样化验,借助GIS技术,应用Kriging插值方法,分析研究了太湖流域典型地区土壤肥力水平交化及其空间分布情况。研究结果表明,该地区土壤有机质、速效钾处于中等偏低的水平,该地区土壤有机质含量大多数在20~30 g/kg之间,占总量的71.6%。该地区土壤速效钾含量主要处在55~90 mg/kg之间,占总量的73.74%。土壤速效磷总体来说处于偏低水平,但是点与点的差距较大,从速效磷的空间分布情况来看,土壤速效P呈现出明显的地带性分布规律,在该地区西部的土壤速效P含量是低水平,而东部靠近太湖边上的土壤速效P含量是属于比较高或极高的水平。绝大部分土壤的pH值在5.3~5.7之间,土壤处于偏酸水平。

 
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