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- 土壤C、N含量soil C and N content
- 土壤C素soil C
- 土壤C储量Soil carbon storage
- N含量N content
- 结果表明,杉木人工林取代天然次生林阔叶林后表层土壤总有机碳含量下降31.51%~58.24%,土壤全氮、全磷、pH值以及土壤C/N、C/P比亦呈下降趋势;The results showed that after replacing with Cunninghamia lanceolata plantation,the total organic carbon (TOC) content in surface soil decreased by 31.51%2558.24%25,and the contents of soil total N and P,pH value,C/N and C/P also decreased to different degree.
- 土壤soil
- c语言
- 喷灌条件下土壤NO-3-N含量的空间变异性研究STUDY ON SPATIAL VARIABILITY OF NO-3-N CONTENT IN SOIL UNDER SPRINKLING IRRIGATION CONDITION
- 维生素Cvitamin(e) C
- 7月8日取样测定，根、茎都以K含量最高，N含量次之，P含量最低，而叶部和铃壳以N含量最高，K含量次之。The measuremnt on July 8 and Sep. 8 of the nutrient content in the roots and stems showed. The first one was K, second N, third P; but leaves and the bell shells contained most N, less relatively K.
- 土壤的edaphic
- C语言程序设计Programming in C
- 土壤微生物edaphon
- 用热分析、X射线衍射及N含量分析研究了三斜仲钨酸铵（NH4）10H2W12O4210·H2O的热分解机理；The thermal decomposed mechanism of orthorhombic ammonium paratungstate,(NH4)10H2W12O4210H2O,was investigated by DAT,XRD and analysis of N content.
- 有些土壤不适于耕作。Some soils are not suitable for farming.
- 在此条件下,获得的甲壳素产品为白色粉状固体,其N含量为6.87%,灰分为1.19%,水分为8.37%。 产率为29.97%。The obtained chitin under conditions obove mentioned was white powdery solid with the nitrogen content 6.87%25,ash content 1.19%25,water content 8.37%25,and production ratio 29.97%25.
- N、P含量contents of N and P
- A+T的含量明显高于G+C的含量。The average content of T, C, A, G of 28S rDNA gene sequence of 22 species of Tettigonioidea are 21.4%25, 27.4%25 17.7%25 and 33.5%25 respectively, and G+C content is 60.9%25, G+C content is higher than A+T content obviously, which shows a strong G+C bias.
- 添加量在0.8%以上时,可以显著降低(P<0.05)培养液中的NH3-N含量,对培养残渣中的NDF含量没有显著影响(P>0.05)。There was a significant decrease(P<0.05)in NH3-N concentration in the incubation fluids when the addition level was over 0.8%25. No significant effect(P>0.05)was found on the NDF content in the culture residue by the addition of MOS;
- C/NC/N
