土壤有机质含量

施用除草剂使土壤有机质含量和土壤pH降低，但是增加了土壤速效养分含量。

Herbicide application decreased soil organic matter content and pH value , but increased the available N , P , K.

一种估测土壤有机质含量的近红外光谱参数

A near-infrared spectral index for estimating soil organic matter content

C高；土壤有机质含量较高。

The content of organic matter is higher . the organic content is relatively high ;

植物叶片中N素与土壤有机质含量、土壤含水量等指标相关性显著。

A significant correlation was found between N concentrations in leaves and soil organic matter , soil moisture .

施用生态有机肥有利于提高土壤有机质含量，降低土壤pH，防止土壤盐分积累；

It was effective to promote organic matter of soil , lower pH , prevented from accumulation of salt .

与常规耕作相比，保护性耕作土壤有机质含量增加，但土壤pH值变化不明显。

Compared with conventional cultivation , the soil organic matter content in conservative cultivation increased , but the soil pH changed a little .

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 .

结合灌根施用铁肥，增加土壤有机质含量，降低土壤pH值等综合措施有效地矫治黄化病。

Based on above results , proper use of organic matter to decrease soil pH value are important measures to improve and remain Fe availability in soil .

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 .

采用多元线性回归统计法和BP神经网络法分别建立了预测土壤有机质含量和土壤游离态氧化铁含量的多元回归模型、BP神经网络模型。

The models of multivariate linear regression and BP neural network were established in order to predict their content of soil organic matter and free ferric oxide .

土壤有机质含量是影响CH4产生的最重要土壤性质。

Soil organic matter content is the most important property to affect CH 4 production .

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 .

土壤有机质含量和CEC是影响供试土壤Cu2+吸附量的主要因素。

Organic matter content and CEC are the two major factors affecting soil Cu ~ ( 2 + ) adsorption .

试验得到的主要结论为：（1）日光温室土壤有机质含量随日光温室栽培年限的增加而增加，日光温室土壤pH值低于农田土壤。

The conclusions were as follows : ( 1 ) The content of organic matter increased with the years of greenhouse , and pH of soil in greenhouse was lower than that of field soil .

采用地统计学和GIS相结合的方法，研究了甘蔗连作19年（1980~1999年）的低丘陵红壤蔗区土壤有机质含量的时空变异特征。

Temporal and spatial changes of soil organic matter ( SOM ) content in the sugarcane field after 19-year interval ( from 1980 to 1999 ) were evaluated using geostatistics and geographic information system ( GIS ) .

土壤有机质含量逐渐减少，pH值、电导率及含盐量均比草原对照地土壤低。

Moreover , the content of organic matter in soil reduces gradually , and the pH value , electric conductivity and salt content of the soil in the reclaimed farmland are all lower than that in the contrast grasslands .

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 .

土壤有机质含量，CK和PK处理区降低10%，其他处理基本持平。

The content of soil organic matter decreased by 10 % in Treatments CK and PK , and remained stable in the other treatments after the 8-year experiment .

结果表明，土壤有机质含量比较丰富，土壤速效N、P、K缺乏分别为30.36%、32.14%和28.57%；

The results showed that the soil organic matter in citrus orchards was in relatively high status , and the deficiency rate of available macronutrients N , P , and K was 30.36 % , 32.14 % , and 28.57 % , respectively .

DCCA排序进一步表明了土壤有机质含量是所有因子中对植物群落发展起决定性作用的主要环境因素。

DCCA ordination showed that soil organic matter content was the decisive factor to the development of communities .

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 .

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 ;

研究发现，沼气发酵残留物能使温室土壤有机质含量提高31.60%，黄瓜总产量提高15.90%，能显著提高黄瓜的还原糖、Vc含量。

The results indicated , biogas residues could enhance the organic matter of greenhouse soil by 31.60 % . The output of cucumber was enhanced by 15.90 % . And the reductive sugar and Vc of the cucumber were obviously enhanced .

相关性分析结果表明，半红树植物群落的土壤有机质含量可能是该处生境中影响AMF侵染半红树植物的主要环境因子。

The results of correlation analysis showed that the soil organic matter content could be the most important environmental factor affecting the symbiosis between AMF and semi-mangrove species . 4 .

经测定各生境的多样性指数H′，优势度指数C′，均匀性指数E′和相似性系数，结果表明植被类型、土壤有机质含量是影响土壤动物群落结构的主要生态因子。

The results showed it was these main ecological factors including the vegetation types and organic contents that had effect on structure of the soil animal community after analyzing the indexes of diversity ( H )′, dominance ( C )′, evenness ( E )′ and comparability coefficient of different habitats .

在同一土层，生物复合肥料、菌剂和保水剂均显著提高土壤有机质含量（p<0.01），并显著降低土壤P2O5含量（p<0.01）；

At the same soil depth , Biological compound fertilizers , biopreparate , absorbent polymers can improve the contents of organic matter and decrease that of P_2O_5 ;

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 .

不同宽度不同层次的土壤有机质含量为14.45～36.13g/kg。

Soil organic content changes from 14.45 g / kg to 36.13g/kg among different width and different levels .

稻-鸭-鱼试验区土壤有机质含量与对照相比提高了1.31g/kg，稻-鱼试验区与对照区相比提高了0.61g/kg。

The organic matter content of soil reduced in rice-fish area is 0.61g/kg higher than that in CK .