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【农业科技】怎样判定玉米的收获期

  • 2026-08-21 10:39:47
【农业科技】怎样判定玉米的收获期

目前北方春播玉米大多接近成熟，陕西关中地区春播玉米即将进入收获期，很多农民朋友关心什么时候收获最合适？蜡熟期的玉米千粒重仅为完熟期90%左右，有实验证明蜡熟期玉米每晚收1天，千粒重可增加1~5克，亩增产5~10千克。

适当推迟玉米收获期，在不增加成本的情况下，可以大幅度提高产量，是实现玉米增产的有效方式。那么什么时候是收获玉米的最佳时期，主要有三看:

一看籽粒状态。玉米籽粒达到生理成熟时，干物质积累停止，籽粒水分会降到30%左右，籽粒靠穗轴的基部会出现黑色层，籽粒颜色光亮而且坚硬，此时粒重最大，产量最高，是最佳的收获时期。

二看苞叶。玉米植株的中、下部叶片变黄，基部叶片干枯，果穗即棒子苞叶呈黄白色且松散，籽粒含水量降到30%以下，此时也是收获的好时机。

三看生长时间。如果种植的是睌熟品种，不能只看表相，要根据所种植玉米本身生长天数是多少来决定。一般情况下，按玉米生育期延长10天左右进行收获为宜。

这里要提醒种植户朋友们注意的是:虽说适时晚收可实现增产，但也不能一味的推迟。要关注天气情况，如遇有连阴雨天气就必须及时采收。如果要连续种下茬作物，过晚收获会对下一轮农作物的播种及生长造成影响。

  撰稿：吴平

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  137. /yingpanguazai/ssd/ssd1/www/h.mffb.com.cn/vendor/topthink/think-template/src/template/driver/File.php ( 2.41 KB )
  138. /yingpanguazai/ssd/ssd1/www/h.mffb.com.cn/vendor/topthink/think-template/src/template/contract/DriverInterface.php ( 0.86 KB )
  139. /yingpanguazai/ssd/ssd1/www/h.mffb.com.cn/runtime/temp/32b793ebdcbdb96aeb8bb24c123b0bef.php ( 11.98 KB )
  140. /yingpanguazai/ssd/ssd1/www/h.mffb.com.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.001026s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001347s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.004590s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.002052s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001513s ]
  6. SELECT * FROM `set` [ RunTime:0.005256s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001655s ]
  8. SELECT * FROM `article` WHERE `id` = 571243 LIMIT 1 [ RunTime:0.003378s ]
  9. UPDATE `article` SET `lasttime` = 1787286365 WHERE `id` = 571243 [ RunTime:0.021705s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000606s ]
  11. SELECT * FROM `article` WHERE `id` < 571243 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.032671s ]
  12. SELECT * FROM `article` WHERE `id` > 571243 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.027196s ]
  13. SELECT * FROM `article` WHERE `id` < 571243 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.018676s ]
  14. SELECT * FROM `article` WHERE `id` < 571243 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.037951s ]
  15. SELECT * FROM `article` WHERE `id` < 571243 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.082571s ]
0.433073s