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汉语拼音：yǒu jī zhì

指动植物的所有有机物质，如淀粉、脂肪、蛋白质、纤维素等。土壤中的有机质，包括动植物残体、死亡的微生物和施用的有机肥料等。肥沃的土壤含有较多的有机质。

1. 一般指植物体和动物的遗体、粪便等腐烂后变成的物质，里面含植物生长所需的各种养料。有机质经过微生物的作用转化成腐殖质，起到改良土壤的作用。

• Additions of organic matter to soil hasten calcium losses.

  土壤增施有机质会促进钙的损失.

• In dry areas an organic sheet may be helpful and improve survival.

  在干旱地区用有机质纸张育种有助于提高成活率.

• The organics are extracted with chloroform and weighed.

  用氯仿将有机质提取出来并称重.

• These organics impregnate large volumes of sandstone.

  这种有机质渗入了大面积的砂岩.

• These compounds make up approximately 10 to 15 % of the total organic matter in soils.

  这些化合物占整个土壤有机质总量的10%-15%.

• Soil organic matter is the product of microbial decomposition of plant and animal residues.

  土壤有机质是微生物分解植物和动物残体的产物.

• The organic matter in soil contains a small but fairly uniform proportion of phosphate.

  土壤有机质中含有少量的磷酸盐,且其比例始终不变.

• Adult phototaxis and first instar larva eat rotten organic matter.

  成虫有趋光性,初孵幼虫喜食已腐烂的有机质.

• Capacity measuration is the prevailing method of soil organic matter determination.

  容量法是土壤有机质测定中普遍使用的方法.

• And the ore contains hydromica ( illite ), quartz, organic material and algal fossil.

  矿石主要由水云母 ( 利石 ) 石英组成, 含有机质及藻类化石.

• And karst diaspore bauxite deposits belong to bioorganic sedimentary deposits.

  又我国硬水铝石岩溶铝土矿,应属于生物有机质成矿作用的沉积型铝土矿.

• It had positive correlation with soil organic matter and CEC.

  其吸附率与土壤有机质、CEC呈正相关.

• Man can't live without organic matter.

  有机质是人体耐以生存的必需物质.

• Waters with low SUVA values contain primarily non - humic matter and are not amenable to enhanced coagulation.

  水域低苏瓦值包含主要是非腐植酸有机质和不服从强化混凝.

• Organic pesticides or their degradation products, become bound to organic matter or fractions of the soil.

  有机农药或其代谢产物在进入土壤中后, 可以与土壤有机质或矿质形成结合残留物.