diff --git a/agri-system/src/main/java/com/agri/system/service/impl/SysDtuDataServiceImpl.java b/agri-system/src/main/java/com/agri/system/service/impl/SysDtuDataServiceImpl.java
index 93aa50e..d76347f 100644
--- a/agri-system/src/main/java/com/agri/system/service/impl/SysDtuDataServiceImpl.java
+++ b/agri-system/src/main/java/com/agri/system/service/impl/SysDtuDataServiceImpl.java
@@ -159,20 +159,18 @@ public class SysDtuDataServiceImpl extends ServiceImpl<SysDtuDataMapper, SysDtuD
         List<BigDecimal> humi4List = new ArrayList<>();
 
         // 工具方法：null转0
-        Function<BigDecimal, BigDecimal> nullToZero = bd -> bd == null ? BigDecimal.ZERO : bd;
-
         // 一次遍历收集所有数据（性能最优）
         if (CollectionUtils.isNotEmpty(historyData)) {
             historyData.forEach(dtuData -> {
                 categories.add(dtuData.getTime().format(formatter));
-                temp1List.add(nullToZero.apply(dtuData.getTemp1()));
-                temp2List.add(nullToZero.apply(dtuData.getTemp2()));
-                temp3List.add(nullToZero.apply(dtuData.getTemp3()));
-                temp4List.add(nullToZero.apply(dtuData.getTemp4()));
-                humi1List.add(nullToZero.apply(dtuData.getHumi1()));
-                humi2List.add(nullToZero.apply(dtuData.getHumi2()));
-                humi3List.add(nullToZero.apply(dtuData.getHumi3()));
-                humi4List.add(nullToZero.apply(dtuData.getHumi4()));
+                temp1List.add(dtuData.getTemp1());
+                temp2List.add(dtuData.getTemp2());
+                temp3List.add(dtuData.getTemp3());
+                temp4List.add(dtuData.getTemp4());
+                humi1List.add(dtuData.getHumi1());
+                humi2List.add(dtuData.getHumi2());
+                humi3List.add(dtuData.getHumi3());
+                humi4List.add(dtuData.getHumi4());
             });
         }