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【产品中心】AccuPAR植物冠层分析仪

来源：北京力高泰科技有限公司分类：工作原理 2024-02-26 10:00:10 11阅读次数

产品中心 -> 植物测量系列 -> 冠层尺度测量 -> AccuPAR植物冠层分析仪

光合有效辐射（PAR）和叶面积指数（LAI）是评估植物健康状况和植物冠层结构的重要指标。PAR表示有多少光能可被植物光合作用利用；LAI可用于估计冠层密度和生物量，是植物冠层结构的一项重要表征参数。AccuPAR 可以同时测量PAR和LAI。AccuPAR植物冠层分析仪被广泛应用于农业、林业和植物学等研究领域。

工作原理

探头中包括80个间隔为1 cm的PAR光量子传感器，用于测量环境光照中PAR的变化，输入研究区域的经纬度和时间，仪器可自动计算出天顶角，通过设置叶角分布参数（χ）和测量冠层上、下PAR的比率，可以计算出植物冠层的LAI值。

主要优点

?  经济、便携
?  实时测量PAR
?  简便直观的7键控制
?  自动记录模式功能
?  强大的数据存储能力，1M闪存
?  低电消耗，仅需4节7号碱性电池
?  外置PAR传感器可用于探杆校准和实时测量冠层上、下的PAR值

系统组成

?  带传感器的控制单元
?  测量探杆和外置PAR传感器
?  RS-232数据线、数据传输软件、用户说明书及手提箱

技术指标

了解更多信息，请点击「阅读原文」。

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[8]未定义数组索引: page
[2]Declaration of app\common\model\TechNewsCategory::getList($filter = Array) should be compatible with app\common\model\BaseModel::getList($filter = Array, $sort = Array)
[8]未定义数组下标: 0
[2]Declaration of app\common\model\TechNews::getAllList($filter = Array, $limit = 10, $order = Array, $with = Array) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[2]Declaration of app\common\model\Company::getAllList($filter = Array, $limit = 20) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[8]未定义数组索引: center
[8]Only variables should be passed by reference
[2]Declaration of app\common\model\TechNewsComment::getAllList($filter = Array, $limit = 16) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[8192]Function create_function() is deprecated
[8192]Function create_function() is deprecated
[8]未定义数组索引: area
[8]未定义数组索引: st
[2]Declaration of app\common\model\Topic::getList($filter = Array) should be compatible with app\common\model\BaseModel::getList($filter = Array, $sort = Array)
[2]Declaration of app\common\model\Topic::getAllList($filter = Array, $field = 'id,md5,tit...', $limit = 0) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[2]Declaration of app\common\model\TopicInfoList::getAllList($filter = Array, $limit = 8) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[2]Declaration of app\common\model\News::getAllList($filter = Array, $limit = 16, $order = Array, $with = Array) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[8]未定义数组索引: center
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: goods_list
[8]未定义数组下标: 0
[8]未定义数组索引: center
[8]未定义数组索引: center
[8]未定义数组索引: center
[8]未定义数组索引: center
[8]未定义数组索引: center
[8]未定义数组索引: wtt_list

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[ SQL ] SELECT `id`,`md5`,`title`,`created_time` FROM `tech_news` WHERE `review_status` = 1 AND `is_show` = 1 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000201s ]
[ SQL ] SHOW COLUMNS FROM `user` [ RunTime:0.000838s ]
[ SQL ] SELECT `a`.* FROM `user` `a` INNER JOIN `tech_news` `b` ON `a`.`id`=`b`.`user_id` GROUP BY `a`.`id` ORDER BY `b`.`id` DESC LIMIT 10 [ RunTime:0.005382s ]
[ SQL ] SELECT * FROM `user_info` WHERE `user_id` IN (592,413,444,224,13,239,598,697,394,285) [ RunTime:0.001248s ]
[ SQL ] SHOW COLUMNS FROM `seo` [ RunTime:0.000908s ]
[ SQL ] SELECT * FROM `seo` WHERE `column_type` = '16' AND `page_type` = 'tech_news' AND `info_id` = 2529 LIMIT 1 [ RunTime:0.000210s ]
[ SQL ] SELECT * FROM `tech_news_belong_category` WHERE `tech_news_id` = 2529 [ RunTime:0.001613s ]
[ SQL ] SELECT * FROM `tech_news_belong_category` WHERE `tech_news_id` = 1919 [ RunTime:0.001694s ]
[ SQL ] SELECT * FROM `tech_news_belong_category` WHERE `tech_news_id` = 3834 [ RunTime:0.001563s ]
[ SQL ] SELECT * FROM `tech_news_belong_category` WHERE `tech_news_id` = 3825 [ RunTime:0.001549s ]
[ SQL ] SELECT * FROM `tech_news_belong_category` WHERE `tech_news_id` = 3733 [ RunTime:0.001538s ]
[ SQL ] SELECT * FROM `tech_news_belong_category` WHERE `tech_news_id` = 3687 [ RunTime:0.001544s ]
[ SQL ] SELECT * FROM `tech_news_belong_category` WHERE `tech_news_id` = 3686 [ RunTime:0.001566s ]
[ SQL ] SELECT * FROM `tech_news_belong_category` WHERE `tech_news_id` = 3644 [ RunTime:0.001627s ]
[ SQL ] SELECT * FROM `tech_news_belong_category` WHERE `tech_news_id` = 3605 [ RunTime:0.001582s ]
[ SQL ] SELECT * FROM `tech_news_belong_category` WHERE `tech_news_id` = 3604 [ RunTime:0.001559s ]
[ SQL ] SELECT * FROM `user` WHERE `id` = 288 LIMIT 1 [ RunTime:0.000202s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 592 LIMIT 1 [ RunTime:0.000217s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 592 LIMIT 1 [ RunTime:0.000156s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 413 LIMIT 1 [ RunTime:0.000163s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 413 LIMIT 1 [ RunTime:0.000156s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 444 LIMIT 1 [ RunTime:0.000142s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 444 LIMIT 1 [ RunTime:0.000158s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 224 LIMIT 1 [ RunTime:0.000143s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 224 LIMIT 1 [ RunTime:0.000136s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 13 LIMIT 1 [ RunTime:0.000150s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 13 LIMIT 1 [ RunTime:0.000143s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 239 LIMIT 1 [ RunTime:0.000137s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 239 LIMIT 1 [ RunTime:0.000141s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 598 LIMIT 1 [ RunTime:0.000159s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 598 LIMIT 1 [ RunTime:0.000152s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 697 LIMIT 1 [ RunTime:0.000154s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 697 LIMIT 1 [ RunTime:0.000160s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 394 LIMIT 1 [ RunTime:0.000150s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 394 LIMIT 1 [ RunTime:0.000152s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 285 LIMIT 1 [ RunTime:0.000150s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 285 LIMIT 1 [ RunTime:0.000141s ]

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