diff --git a/backend/services/contribution-service/src/pre-planting/application/services/pre-planting-contribution.service.ts b/backend/services/contribution-service/src/pre-planting/application/services/pre-planting-contribution.service.ts
index c9b5f83e..cdfac55f 100644
--- a/backend/services/contribution-service/src/pre-planting/application/services/pre-planting-contribution.service.ts
+++ b/backend/services/contribution-service/src/pre-planting/application/services/pre-planting-contribution.service.ts
@@ -861,6 +861,26 @@ export class PrePlantingContributionService {
         where: { sourceAdoptionId: mergeSourceAdoptionId },
         data: { remark: mergeRemark },
       });
+
+      // 9f: 在 synced_adoptions 中写入合并树记录，供 sell-restriction 检查（has_real_tree 判断）
+      // originalAdoptionId 使用 20B 偏移，与 SellRestrictionService.MERGE_OFFSET 一致
+      const totalPortionCount = sourceOrders.reduce((sum, o) => sum + o.portionCount, 0);
+      await tx.syncedAdoption.upsert({
+        where: { originalAdoptionId: mergeSourceAdoptionId },
+        create: {
+          originalAdoptionId: mergeSourceAdoptionId,
+          accountSequence,
+          treeCount: 1,
+          adoptionDate: miningEnabledAt,
+          status: 'MINING_ENABLED',
+          selectedProvince: firstOrder.provinceCode ?? '',
+          selectedCity: firstOrder.cityCode ?? '',
+          contributionPerTree: contributionPerTree,
+          sourceSequenceNum: BigInt(0),
+          distributionSummary: `PRE_PLANTING_MERGE:${mergeNo}:portions=${totalPortionCount}`,
+        },
+        update: {}, // 幂等：已存在则不修改
+      });
     });
 
     // Step 10: 插入幂等标记（最终一致性，事务提交后 best-effort 写入）