腐殖质

Because of the distinction of soil property and humus content, soil water content is not ideal to indicate whether it is suitable to the growth of plant.

由于土壤性质和腐殖质含量的不同，土壤的含水量并不能很好地说明是否适宜植物的生长。

Humus is a special compound with high molecule in soil. It has important function in soil fertility and entironment.

土壤腐殖质是土壤中所特有的一类特殊的高分子化合物，具有重要的肥力和环境调节功能。

No great difference in the physical properties or chemical structure of humus exist between different terrestrial ecosystems.

禁止伟大在腐殖质的物理特性或者化学结构中差异在不同陆地生态系之间存在。

Field experiments were carried out with sand filter pipe to study the effect of bentonite on soil humus characteristics.

文章通过田间条件下砂滤管试验，利用膨润土的吸附和粘结功能，研究了膨润土不同用量对土壤腐殖质特性的影响。

A millennium humus and a primitive animal whom the scientist dare not to research on it

一堆千年腐殖质，一个科学家都不敢研究的原始动物

These things in the topsoil that were once alive are called humus.

表土中这种曾是活体的东西叫做"腐殖质"。

Humus'.'' and disintegrated rock.

腐殖质'。''和被分解的岩石的部分。

It is rich in humus and slightly acid, due to leaching of lime.

富含腐殖质，微酸性，是比较好的农业用土壤。

The spores of Neocheiropteris palmatopedate were cultured in improved Knop's medium, in-situ humus soil and red soil respectively. Spore germination and gametophyte development were observed under optical microscope and dissecting microscope, and the impact of four culture methods on the gametophyte development and sexual reproduction was compared. On these experiments, its cause of endangerment was analyzed.

采用改良Knop's固体培养基、原生境腐殖质土和红壤分别培养扇蕨孢子，光学显微镜及解剖镜下观察记录其于包子萌发及配子体发育过程，比较了3种培养方法对其配子体发育和有性繁殖的影响，并在此基础上探讨了扇蕨的濒危原因。

Among the environmental factors,temperature nearly make the same effect toall the tree species of broad leaf korean pine forest.Moisture and fertility of soil aregreatly depend on the soil type.In the broad leaf korean pine forest zone,humus darkbrown soil has the best condition of moisture and fertility,The following are typicaldark brown soil、flood and forest soil;the third is albic brown soil and meadow soil;The worst ones are skeleton brown soil and marshy soil.

在影响树木生长的环境因子中，温度对所有树木的影响几乎相同，土壤的水肥因子是与土壤类型相关性很大的量，不同的土壤类型，水肥条件相差极大，在长白山阔叶红松林带，土壤水肥条件最好的是腐殖质暗棕壤，其次是典型暗棕壤和河滩森林土，土壤水肥条件一般的是草甸土和潜育暗棕壤，水肥条件最差的是粗骨棕壤和沼泽土。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。