土壤有机质

利用CENTURY模型模拟土地利用变化情形下内蒙古草原生态典型区土壤有机质动态。

In the end , the CENTURY model was used to study the SOM dynamics in Inner Mongolia grassland of China .

结果表明，Fenton氧化处理后，土壤有机质含量和组成均发生了改变，总有机质含量下降，其中腐植酸含量降低最多，胡敏素的含量基本保持不变，而富里酸含量有升高的趋势。

The results showed that contents of total SOM and humic acid in soil decreased after Fenton oxidation , while humin content in soil did not change significantly , and the content of fulvic acid had a tendency to increase .

土壤有机质的~（14）C年龄与剖面深度呈现良好线性关系。

There is an apparent positive linear correlation between 14C ages and depths .

δ~（13）C方法在土壤有机质研究中的应用

Use of δ ~ ( 13 ) C method in studying soil organic matter

土壤有机质，N和P严重不足，K素丰富。

K is rich in the soil while N and P are deficient .

长期施肥对土壤有机质δ~（13）C值影响的初步研究

Preliminary Study of Impact of Long-term Fertilization on δ 13 C Values of Soil Organic Matter

覆盖后明显提高了土壤有机质及土壤中N、P、K养分含量，尤其是速效养分的含量。

Soil organic matter , N , P and K contents , especially available nutrient , obviously increased after mulching .

太湖流域典型地区土壤有机质、pH和速效磷钾的分布研究

Distribution of soil organic matter , soil pH , available phosphorus and available potassium in soil of Taihu

以甘肃省榆中县为研究区域，应用地统计学和GIS相结合的方法对该县的土壤有机质的空间变异性进行了分析。

Geostatistic method combined with GIS was applied to analyze the spatial variability of soil organic matter in Yuzhong County in Gansu Province as example .

灰色关联分析结果显示，土壤有机质含量和土壤pH值分别与生境中土壤动物的个体数和类群数的关联度较大。

Grey correlation analysis revealed that soil organic matter and soil pH are significant factors which respectively affected soil fauna individual number and group number .

测定秸秆和土壤有机质分解过程中CO2释放量、土壤微生物量和土壤无机氮含量变化，探讨土壤有机质和秸秆分解的规律。

The mechanism of Soil organic matter and wheat straw decomposition were discussed through the accumulated CO2 , microbial biomass and inorganic nitrogen content .

孢子密度与土壤有机质、速效磷、速效钾和Cl-含量呈负相关，泡囊定殖率与土壤pH呈正相关，而与土壤湿度、速效钾和Cl-含量呈负相关。

Spore density is also negatively correlated with the contents of soil organic matter , soil available P , soil available K and soil Cl - .

高氯取代PCBs更容易吸附在土壤有机质中。

High chlorinated PCBs are more inclined to be absorbed by soil organic materials .

这表明矿渣废弃地渗透系数大，蓄水量少而蒸发失水强烈，抗旱力弱；碱性较强，土壤有机质、N、P、K含量低；

These show that the slag wastelands have little water accumulation and high evaporative power , alkaline soil , the low content of organic matter , N , P , K.

综述了土壤有机质含量、pH值、主要营养元素等土壤肥力因素对烤烟叶片硝酸盐积累影响的研究概况。

Effects of some soil fertility indexes including content of organic matter , pH value and main nutrient elements on nitrate accumulation in flue-cured tobacco leaf were summarized .

连续施用增量N、P、K化肥，可使土壤有机质及Kos值保持稳定，但投入成本较高；

With increment N , P , K chemical fertilizer applied successively , soil organic matter and oxidation stability coefficient kept steady with high kos .

CK和PK处理在不同生育期其根际pH值均低于根外，且在所有处理中差别最大，土壤有机质含量是逐渐下降的。

The pH value of the CK and PK treatments were much lower in the rhizosphere than that in the bulk soil .

杨树人工林下的A、B两个样地的土壤有机质、全N和速效N含量在2cm土层中较高；

The organic content , total N and alkali-hydrolysable nitrogen content of Populus spp plantations plot A and B is higher in the 2 cm soil layer ;

决策树和GIS图层叠置方法研究结果表明，土壤有机质始终占据决策树全部知识规则的第一次分支，起着重要的决定性作用，其次为速效磷和碱解氮；

The results based on decision-making tree and GIS overlay analysis show that the soil organic matter always holds the first place in all knowledge rules , P and N rank the second .

总之，葡萄园行间生草覆盖禾本科多年生黑麦草有利于土壤有机质的提高，豆科植物白三叶草和紫花苜蓿有利于N的积累。

In short , among the treatments of 3 kinds of grass , the vineyard was benefited from covering with Alfalfa and White Clover cover in N accumulating and Perennial Ryegrass in organic matter increasing .

杉木连栽造成土壤有机质、全氮和H／F的降低和总酚量、游离酚量的升高。

In bulk soil , Chinese fir succession can result in a decline in total organic compounds , total N and H / F , but an increase in total phenol and free phenol .

有机无机配施肥能够显著促进土壤有机质的累积，以稻草代替10%化学氮肥（H）处理和猪粪代替20%化学氮肥（F）处理有机质增加量最高。

Organic-inorganic fertilizing significantly improved the accumulation of soil organic matter , and the organic amount in soil with treatments H and F ( pig manure instead of 20 % chemical nitrogen fertilizer ) were the highest .

而土壤有机质、HA、微生物总数、微生物生物量碳、脲酶和酸性磷酸酶活性是评价红粘土红壤生物学肥力演化最重要的指标。

The changes of soil organic matter , humic acid , total amount of microbe , microbial biomass C , activity of urease and phosphatase reflected mainly the evolution of soil biological fertility .

随着放牧强度的增加，防护林草地硬度、容重增加，土壤有机质和土壤N、P、K营养元素含量降低。

The effect of grazing on the grassland under woods is relatively great , along with the increase of grazing intensity , soil rigidity , soil capacity , and the nutrient element of N , P , K all decreasing accordingly .

土壤有机质含量为4%～5%、容量接近1.18g／cm3时，土壤水分蒸发细度最小；

When content of soil organic matter 4 % - 5 % , the evaporation intensity of soil water is the smallest .

其中，土壤有机质含量呈上升状态，有效N含量变化平稳，稍有上升，全N、有效P、有效K则呈下降趋势。

Among the monitored nutrients , the content of soil organic matter showed the tendency of going up , the content of available nitrogen was totally stable , that of total nitrogen , available phosphate and available potassium showed the tendency of coming down .

农田土壤有机质是评价土壤肥力和土壤质量的重要指标，同时也是全球C库的重要组成部分，其时空变化动态对土壤质量和全球气候变化有重要影响。

Soil organic matter ( SOM ) in farmland is an important index of assessing soil fertility and soil quality of the farmland and also an integral component of the globe carbon stock . Therefore , dynamic of SOM has an important influence on global climate change .

建立了土壤有机质含量和CEC与土壤Cu2+吸附量的关系模型。

Based on the findings , a model is established to illuminate the relationship of Cu ~ ( 2 + ) adsorption with organic matter content and CEC .

0～60cm土层土壤有机质含量随深度的增加而减小；

The content of soil organic matters reduced with the increase of soil depth in 0-60 cm layers ;

结果表明：经过10年，0~20cm苹果园土壤有机质和全氮分别平均增加了2·548、0·317g·kg-1；

The main result showed that organic matter and total N gave an increase of 2.548 and 0.317 mg · kg ~ - 1 during 10 years , respectively .