{
  "$schema": "https://themachinepress.com/schemas/story-v1.schema.json",
  "schema_version": "1.0.0",
  "document_type": "machine_press_story",
  "story": {
    "story_id": "mp-2026-07-19-013",
    "source_story_id": "tmp-story-mulberry-biochar-bass-feed",
    "edition_id": "mp-2026-07-19-morning-0010",
    "edition_url": "https://themachinepress.com/edition/2026-07-19",
    "position": 13,
    "story_type": "dispatch",
    "section": "research",
    "editorial_classification": "editorial",
    "headline": "Mulberry Char Goes Into the Feed, Then Cleans the Water",
    "slug": "mulberry-char-goes-into-the-feed-then-cleans-the-water",
    "dek": "Moderate dietary biochar improved gut measures and cut nitrogen pollutants without changing bass growth.",
    "summary": "Moderate dietary biochar improved gut measures and cut nitrogen pollutants without changing bass growth.",
    "body_text": "In a 42-day trial, 480 largemouth bass received feed containing zero, 10, 20, or 40 grams of mulberry-branch biochar per kilogram. Moderate levels increased digestive enzymes and microbial richness and reduced ammonia nitrogen by 60.7 percent in the 10-gram group and 49.3 percent in the 20-gram group by day 42. Growth did not change significantly, and the highest dose may disturb microbial balance; commercial aquaculture effects remain to be tested.",
    "why_it_matters": "Moderate dietary biochar improved gut measures and cut nitrogen pollutants without changing bass growth.",
    "limitations": [
      "Growth did not change significantly, and the highest dose may disturb microbial balance; commercial aquaculture effects remain to be tested."
    ],
    "importance": 7,
    "canonical_url": "https://themachinepress.com/story/mp-2026-07-19-013/mulberry-char-goes-into-the-feed-then-cleans-the-water",
    "json_url": "https://themachinepress.com/story/mp-2026-07-19-013.json",
    "first_published_at": "2026-07-19T09:00:00.000-04:00",
    "modified_at": "2026-07-19T09:00:00.000-04:00",
    "content_status": "new",
    "is_carryover": false,
    "carryover_reason": null,
    "key_claims": [
      {
        "claim_id": "claim-mp-2026-07-19-013-001",
        "text": "Moderate dietary biochar improved gut measures and cut nitrogen pollutants without changing bass growth.",
        "source_ids": [
          "source-2026-07-19-013"
        ],
        "qualification": "Growth did not change significantly, and the highest dose may disturb microbial balance; commercial aquaculture effects remain to be tested."
      }
    ],
    "source_ids": [
      "source-2026-07-19-013"
    ],
    "tags": [
      "aquaculture",
      "biochar",
      "water quality"
    ],
    "image_url": null,
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-07-19-013",
      "title": "Chinese Academy of Sciences via Newswise: Mulberry biochar fish feed",
      "publisher": "Chinese Academy of Sciences via Newswise",
      "url": "https://www.newswise.com/articles/mulberry-branch-biochar-offers-a-greener-feed-strategy-for-healthier-largemouth-bass-aquaculture",
      "canonical_url": "https://www.newswise.com/articles/mulberry-branch-biochar-offers-a-greener-feed-strategy-for-healthier-largemouth-bass-aquaculture",
      "source_type": "secondary_reporting",
      "is_primary_source": false,
      "published_at": null,
      "accessed_at": "2026-07-19T08:27:22.202-04:00",
      "supports_claim_ids": [
        "claim-mp-2026-07-19-013-001"
      ]
    }
  ],
  "corrections": [],
  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
  },
  "cite_this_report": {
    "title": "Mulberry Char Goes Into the Feed, Then Cleans the Water",
    "publisher": "The Machine Press",
    "published_at": "2026-07-19T09:00:00.000-04:00",
    "canonical_url": "https://themachinepress.com/story/mp-2026-07-19-013/mulberry-char-goes-into-the-feed-then-cleans-the-water"
  }
}