求翻译：土壤有机质是评价土壤肥力质量的一项重要指标,与多种土壤养分相关,同时对土壤持水供水能力、孔隙度和团聚体等物理性质有重要的影响[15]。它是土壤中各营养元素特别是N、P的重要来源,土壤有机质的积累和分解,不但与林地植物种类有关,而且与气候、地形等条件相关.是什么意思？

Evaluation of soil organic matter is an important indicator of soil fertility, soil nutrients associated with a variety, while the soil water-holding capacity of water, porosity and other physical properties of aggregates has important implications [15]. It is the soil of nutrients, especially N, P

soil organic matter soil fertility evaluation is an important indicator of quality, with multiple soil nutrients related, and at the same time the Soil porosity and water-supply capacity, such as Commonwealth reunited physical nature have an important impact on [ 15 ]. It is in the soil humates espe

The soil ulmin is appraises the soil fertility quality an important target, is related with many kinds of soil nutrient, simultaneously holds water physical properties and so on water furnishing ability, porosity and coacervate to the soil has important influence [15].It is in the soil various nutri

Evaluation of soil organic matter is an important indicator of soil fertility, associated with a variety of soil nutrients, soil water holding capacity at the same time, physical properties such as porosity and aggregate important influence [15]. It is in the soil nutrient elements particularly impo

Evaluation of soil organic matter is an important indicator of soil fertility, soil nutrients associated with a variety, while the soil water-holding capacity of water, porosity and other physical properties of aggregates has important implications [15]. It is the soil of nutrients, especially N, P