El acolchado incluye materia orgánica.

In this sentence, acolchado most likely means mulch or mulching material, especially in a gardening or agricultural context.

It comes from the verb acolchar, which means to pad, to quilt, or in gardening, to mulch. So el acolchado is literally the mulch layer or the mulching.

A learner might know acolchado from other contexts too:

• un edredón acolchado = a quilted duvet
• una chaqueta acolchada = a padded jacket

So the core idea is something layered or padded.

Spanish often uses a past participle as a noun, and that is what is happening here.

• acolchado is the past participle of acolchar
• here it functions as a noun
• el acolchado = the mulch / the mulching / the padded layer

This is very natural in Spanish. Similar examples are:

• el lavado = the washing / wash
• el secado = the drying
• el acabado = the finish / finishing

So although acolchamiento might exist in some technical usage, acolchado is the more natural and common form in many contexts.

El is the masculine singular definite article, meaning the.

It is used because acolchado is being treated as a specific noun:

• El acolchado incluye materia orgánica = The mulch includes organic matter

Spanish uses articles more often than English does. In English, you might sometimes say just mulch includes organic matter, but in Spanish, using el is very normal when talking about something as a category or defined thing.

Because the subject is el acolchado, which is singular.

• el acolchado = singular
• incluye = he/she/it includes or includes

So:

• El acolchado incluye... = The mulch includes...

If the subject were plural, then you would use incluyen:

• Los acolchados incluyen materia orgánica = The mulches include organic matter

Incluye is the present indicative form of incluir.

Specifically, it is the third person singular:

• yo incluyo
• tú incluyes
• él / ella / usted incluye

In this sentence, it means something like:

• includes
• does include
• contains (depending on context)

The present tense is often used in Spanish for general truths, descriptions, or definitions, which fits this sentence well.

It is mostly regular, but it has a spelling change in the yo form:

• yo incluyo
• tú incluyes
• él/ella/usted incluye
• nosotros incluimos
• vosotros incluís
• ellos/ellas/ustedes incluyen

The y in incluyo is the main thing to notice. This happens with several verbs ending in -uir (but not -guir), such as:

• construir → construyo
• concluir → concluyo

Because orgánica must agree with materia, which is a feminine singular noun.

Agreement in Spanish means the adjective changes to match the noun:

• materia = feminine singular
• orgánica = feminine singular adjective form

Compare:

• materia orgánica = organic matter
• material orgánico = organic material

So the ending changes because the noun changes.

Yes, very much so. Materia orgánica is a normal and common equivalent of English organic matter, especially in:

• gardening
• agriculture
• soil science
• biology
• environmental topics

It refers to material that comes from living organisms or their decomposition, such as:

• leaves
• compost
• plant remains
• manure

So this phrase is standard and natural in Spanish.

Yes. In context, English could translate it in a few natural ways:

• The mulch includes organic matter
• The mulch contains organic matter
• Mulch includes organic matter

The best choice depends on the context. Incluir often means to include, but in practical or technical writing it can overlap with contain if the idea is that something has something as part of its composition.

If the original meaning is already understood, a learner might still want to know what kind of English style it corresponds to.

Depending on context, natural English versions could be:

• The mulch contains organic matter.
• Mulch includes organic matter.
• The mulch is made up of organic matter. (if that is the intended idea)

This helps show that Spanish incluye does not always map to only one English verb in a rigid way.

In standard Peninsular Spanish, acolchado is pronounced approximately:

ah-kol-CHA-do

A few useful points:

• a = like a in father
• co = a short ko
• ch = like English ch
• stress falls on cha: a-col-CHA-do

A rough IPA version is [akolˈtʃaðo].

In Spain, the d in the middle of a word can sound softer than in English, especially between vowels.

Yes, especially in a technical, agricultural, ecological, or gardening context. It sounds like an informative or explanatory sentence.

For example, you might see similar wording in:

• gardening guides
• agricultural instructions
• school science materials
• product descriptions

If someone wanted to sound a little more everyday or specific, they might also say:

• El acolchado lleva materia orgánica.
• El acolchado contiene materia orgánica.

But incluye is perfectly correct and natural.

Yes, and that is exactly what happens: there is no article before materia orgánica.

Spanish often leaves out the article when talking about an unspecified substance or material after certain verbs:

• incluye materia orgánica
• contiene agua
• necesita fertilizante

If you added an article, it would change the meaning slightly:

• incluye materia orgánica = includes organic matter in general
• incluye la materia orgánica = includes the organic matter, meaning some specific organic matter already known in context

So the version without the article is the most natural here.