neutral soil 中文意思是什麼
neutral soil
解釋
中性土壤-
The soil is neutral. fertility is also lower. aiming at solving these serious problems, we put forward improvement ways and methods, which will have profound significance in afforesting and beautifying northern cities
通過綜合分析，找出了哈爾濱城市綠地土壤的障礙因素，提出了改良方向與措施，對北方城市的綠化具有一定的參考意義。 -
Mongolica young stand, secondary natural forest, and the mixed forest of larix olgensis and fraxinus mandshurica rupr. countermeasures for controlling soil degradation were also recommended. the study got following results : ( 1 ) from young stand to mid - age of larix olgensis, with the closure of canopy and the decrease of undergrowth vegetation cover, soil acidity, enzyme activity, total inorganic phosphorus, available k, soil moisture and total porosity decreased significantly ; while soil organic matter content, humus component content, the amount of three main types of microbes, acid phosphatase activity, and bulk density in rhizosphere soil and non - rhizosphere soil increased with the increase of the amount of forest floor litter ; from mid - age stand to near mature stand, with the decrease of stand density and crown cover as well as the restoration of undergrowth vegetation after preliminary thinning, soil organic matter content, fulvic acid, exchangeable acidity, exchangeable aluminium, neutral phosphatase activity, total amount of inorganic phosphorus, the amount of actinomycetes, soil moisture, and total porosity in rhizosphere soil and non - rhizosphere soil apparently increased ; from near matu re stand to mature stand, soil activity acidity, organic matter content, humus component content, available phosphorus, total amount of amino acid, available k, soil enzyme activity, soil moisture, and total porosity in rhizosphere soil and non - rhizosphere soil decreased, but total phosphorus, soil acidity ( in particular, exchangeable aluminium ), and bulk density increased
結果表明： （ 1 ）從落葉松幼齡林到中齡林，隨著林冠的郁閉和林下植被蓋度的急劇下降，林地土壤酸度、土壤酶活性、無機磷總量、速效鉀、土壤水分含量、總孔隙度呈明顯下降趨勢，而根際和非根際土壤有機質含量、腐殖質各組分含量、三大類微生物數量、酸性磷酸酶活性和土壤容重隨著凋落物的增加呈明顯上升趨勢；從中齡林到近熟林，由於撫育間伐，林分密度及郁閉度下降，林下植被蓋度逐步得到恢復，根際與非根際土壤有機質含量、富里酸、交換性酸、交換性鋁、中性磷酸酶、無機磷總量、放線菌數量、土壤水分含量、總孔隙度呈明顯的上升趨勢；從近熟林到成熟林，隨著林齡的增大，根際與非根際土壤活性酸、有機質含量、腐殖質各組分含量、有效磷含量、氨基酸總量、速效鉀、土壤酶的活性、土壤水分含量和總孔隙度呈下降趨勢，而根際與非根際土壤全磷含量、土壤酸度（特別是交換性鋁）和容重呈增加趨勢。 -
Either neutral phosphatase or alkaline phosphatase had significant positive relations to soil o. m, po and avail
無論是中性磷酸酶還是堿性磷酸酶都與有機質、有機磷和速效磷有著顯著的正相關關系。 -
The soil phosphate activities were determined after 0, 10, 50, 60 days. the results show that alkaline phosphate activity was degressive, acidic phosphate activity changed inconsistently and neutral phosphate activity was ascending slowing. the analyse of the phosphate activity ' s absolute change also shows that the influence of soil algae on phosphate activity is not prominent
結果表明，待測土壤中的堿性磷酸酶活性全部是下降的，中性磷酸酶活性緩』陛上升，而酸性磷酸酶活性的變化沒有太大的規律性，但是總體上還是上升的、其磷酸酶活性絕對變化的方差分析也表明藻類對土壤磷酸酶的影晌不顯著。 -
It was shown that the position of neutral point of pile shaft varied with the consolidation of surrounding soil and the magnitude of pile - head load
利用該模型分析了大面積堆載下，在樁頂作用大小不同的豎向荷載以及樁側土達到不同固結度時再施加樁頂荷載情況下，樁身摩阻力的發展變化規律。 -
Therefore, metals moving upwards from mineralizations may be absorbed and form weak geochemical anomalies ( weak signals ) in surface loess. the metals can be effectively extracted by neutral salt. loess - covered area in china is primarily distributed at the semiarid region, the secondary carbonates, which were formed after precipitation of ions through evaporation and capillary processes, are widespread in the surface soil
黃土覆蓋區主要分佈在乾旱半乾旱地區，次生碳酸鹽在地表土壤中普遍存在，蒸發所產生的毛細作用、地氣流的上升作用等所帶入的各種形式金屬元素，在地表土壤（黃土）與碳酸鹽發生共沉澱或被吸持。 -
In order to establish the non - destructive detecting standard, transverse wave speed is chose as the non - destructive detecting parameter, which strongly correlated with the compressive strength basing on lots of room experiments, and finds the relation between transverse wave speed of cement - soil and its contributory factors. the forecast model of the non - destructive detecting parameter is established by neutral - network toolbox of the matlab. by this model, transverse wave speed and compressive strength are got by putting the soil style, cement - soil ratio, water - cement ratio, maintain condition and the time
由於水泥土的力學性能通常用抗壓強度來衡量，因此，我們通過大量的水泥土室內試驗建立了剪切波速與抗壓強度以及影響因素之間的對應關系，並利用matlab神經網路工具箱建立了防滲墻施工質量無損檢測指標的預測模型，即通過輸入土類、灰土比、水灰比、養護條件及齡期獲得相應的剪切波速和抗壓強度。
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