地膜覆盖使土壤有机质分解增快。
Soil organic matter decomposition was increased under mulch.
该地区土壤有机质含量不高。
土壤有机质是形成土壤结构的重要因素。
Soil organic matters are an important factor affecting the formation of soil structure.
该地区土壤有机质含量均很低，平均还不到1％。
This region is short of soil organic matter for the average value is less than 1%.
土壤中原有的土壤有机质分解速度与半衰期成反比。
The decomposition rate of original soil organic matter is inversely proportional to its half-life.
土壤有机质中含有少量的磷酸盐，且其比例始终不变。
The organic matter in soil contains a small but fairly uniform proportion of phosphate.
其中，土壤有机质和物理性粘粒是重要的指标划分依据。
Organic substance and physical clay of soil are important basis for index division.
结果表明，该区土壤有机质层全钾的平均含量为（21。
The results showed that the average contents of soil total potassium(STK) and soil available potassium(SAK) were(21.
土壤有机质、全氮、全磷、速效氮具有中等空间自相关性。
Soil organic matter, total nitrogen, total phosphorus, available nitrogen had middle spatial correlation patterns.
加进去的和残留下来的植物物质则是土壤有机质的主要来源。
A major portion of the soil organic matter is derived from the added and residual vegetative material.
土壤有机质和养分（氮、磷和钾等）是土壤肥力重要的物质基础。
Soil organic matter and nutrients(e. g. nitrogen, phosphorus and potassium) play important roles in soil fertility.
土壤多酚氧化酶与土壤有机质的形成有关，是腐殖化的一种媒介。
There is a relationship on soil polyphenol oxidase betweenforming of soil organic matter and medium of forming humus.
建立了符合土壤有机质分解机制的重量损失和碳损失的数学模型。
Mathematical models based on the mineralization mechanism were built for the mass loss and carbon loss.
室内试验表明：其除草效果与土壤有机质、土壤持水量密切相关。
The greenhouse tests also show that its efficacy is concerned with the organic matter and humidity in soil.
提高土壤有机质含量、改善贫瘠的土壤环境是各基地当前的首要措施。
The first and most important work was to improve organic matter content and amend arid soil in every vineyard.
对鼎湖山亚热带森林土壤有机质(SOM)放射性碳进行了核爆效应校正。
Radiocarbon of soil organic matter (SOM) in Dinghushan subtropic forest has been adjusted by the "bomb-effect".
研究中对基于土壤质地和土壤有机质的我国土壤awc模型进行了空间分析。
The spatial model of soil AWC in China, based on texture and organic matter, was analyzed.
土壤有机质和全氮含量也自上而下显著的下降，表现出明显的表层聚集现象。
The soil organic carbon and total nitrogen contents obviously decreased and shown an upper-accumulated pattern.
有机肥与化肥配合施用，土壤有机质呈增加趋势，有利于土壤物理环境的改善。
Mixing application of organic and inorganic fertilizer is favorable to increase amount of soil organic matter and to improve soil physical environment.
土壤有机质含量在1.5%以下，小麦蛋白质含量随土壤有机质含量增加而增高。
The organic matter content in soil was below 1.5% and the wheat protein content raised with the increase of the organic matter content in soil.
沟道及沙棘柔性坝的土壤有机质含量在纵向大致呈现由上游到下游缓慢递增的过程。
Soil organic matter content increases gradually from upstream to downstream in the gully with seabuckthorn flexible dams and in the dam body.
碳水化合物是土壤有机质的重要组成成分，其含量和特性对土壤性质有很大的影响。
Soil carbohydrates constitute a significant part of the soil organic matter and the quality and quantity of carbohydrates in soils can influence the quality of soil.
该研究还指出了，当耕作土壤颗粒与空气接触，土壤有机质就会在氧化过程中流失。
The study also noted that when tilled soil particles come in contact with air, soil organic matter is lost through the process of oxidation.
大幅度提高土壤有机质含量及供钾水平是退化土壤肥力恢复过程中面临的重要问题。
The organic matter and available potassium increased by a big margin will were vital question in the course of the fertility restoration of degenerated soil.
土壤有机质含量增加，土壤结构得到改善，弃耕地植被得到恢复，第一生产力提高。
Soil organic matter content was increased, soil structure was improved, the vegetation of discarded field was restored, and the first production was progressed.
影响黑荆树皮量主导立地因子有土壤质地、坡位、黑土层厚度、坡形、土壤有机质含量。
The paper points out that the factors which influence the bark quantity are soil quality, the position and the shape of the slope, the depth of humus soil, and the content of organic matter.
土壤动物密度及生物量与调落物年归还量、土壤有机质含量、植被盖度等均呈正相关关系；
The density and biomass of soil animal has a positive interrelation to the present content of the fallen, the content of organic substance in soil and vegetation coverage.
然而当前的生产管理方式尽管有利于土壤有机质积累，但是也带来了一系列的生态环境问题。
Although the SOM content was improved, the current agricultural practices brought on a series of ecological problems as well.
土壤微生物的数量变化特征与生物结皮的类型、分布以及土壤有机质含量等因子有一定相关性。
The composition, distribution and quantity of soil microorganisms might be influenced by landform, existence of biological soil crust and organic matter contents.
土壤中的氮素主要以有机氮的形式存在于土壤有机质中， 土壤碳氮比与有机质含量显著相关。
The N in the SOM existed mainly in the form of organic nitrogen, and the soil C:N was significantly correlated with SOM.
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