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牧草观测自动化技术研究与系统设计
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作者 重阳 赵建凯 马修才 《中国农学通报》 2022年第22期126-133,共8页
针对内蒙古自治区生态观测需求,特别是草地生态系统观测需求,选取牧草观测为研究内容,提出基于嵌入式技术和并行计算技术的实时远程可控可视的牧草观测自动化技术思路。采用特征像素图像识别方法,实现牧草覆盖度的自动测量、牧草的发育... 针对内蒙古自治区生态观测需求,特别是草地生态系统观测需求,选取牧草观测为研究内容,提出基于嵌入式技术和并行计算技术的实时远程可控可视的牧草观测自动化技术思路。采用特征像素图像识别方法,实现牧草覆盖度的自动测量、牧草的发育期图像自动识别。利用摄影测量技术结合图像处理技术获得像高转物高变换算法,实现层高与株高的自动测量。结合现代电子技术以及DSP技术、图像处理技术设计了牧草自动观测智能传感器,传感器在观测前端完成图像采集、处理与模式识别后,再将处理后的结果通过网络传向服务器端,可通过智能手机或PC访问服务器远程查看观测数据,实现牧草覆盖度、层(株)高以及牧草生长期的自动观测。测试结果表明,图像处理与实测覆盖度数值显著相关检验R>0.90,与实测株高数值显著相关检验R>0.85。相对于在后端PC系统进行图像处理,不但可以提高观测系统的数据运算处理速度,而且鲁棒性好,同时能够大大减轻数据传输压力,适合对体积、功耗、工作环境及稳定性要求极高的场合。 展开更多
关键词 牧草观测 嵌入式技术 并行计算 牧草覆盖度 株高 图像处理 模式识别
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荒漠地区草地天然牧草地上生物量动态的初步研究
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作者 张辉远 《内蒙古气象》 1996年第5期33-35,共3页
荒漠地区草地天然牧草地上生物量动态的初步研究张辉远(阿拉善盟气象处,750300,阿拉善左旗)1试验地自然概况和试验方法阿拉善荒漠地区年降水量为80-220mm,牧草生育期(4-10月)降水占全年降水量的92%。年平... 荒漠地区草地天然牧草地上生物量动态的初步研究张辉远(阿拉善盟气象处,750300,阿拉善左旗)1试验地自然概况和试验方法阿拉善荒漠地区年降水量为80-220mm,牧草生育期(4-10月)降水占全年降水量的92%。年平均气温6.0-8.0℃,无霜期15... 展开更多
关键词 荒漠地区 天然牧草 地上生物量 牧草覆盖度 线段正投影法 水热条件
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Multifunctionality and Thresholds of Alpine Grassland on the Tibetan Plateau 被引量:1
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作者 SONG Minghua LI Meng +2 位作者 HUO Jiajuan WU Liang ZHANG Xianzhou 《Journal of Resources and Ecology》 CSCD 2020年第3期263-271,共9页
Ecosystems can simultaneously provide multiple functions and services. Knowledge on the combinations of such multi-dimensional functions is critical for accurately assessing the carrying capacity and implementing sust... Ecosystems can simultaneously provide multiple functions and services. Knowledge on the combinations of such multi-dimensional functions is critical for accurately assessing the carrying capacity and implementing sustainable management. However, accurately quantify the multifunctionality of ecosystems remains challenging due to the dependence and close association among individual functions. Here, we quantified spatial patterns in the multifunctionality of alpine grassland on the Tibetan Plateau by integrating four important individual functions based on data collected from a field survey and remote sensing NDVI. After mapping the spatial pattern of multifunctionality, we extracted multifunctionality values across four types of grassland along the northern Tibet Plateau transect. Effects of climate and grazing intensity on the multifunctionality were differentiated. Our results showed that the highest values of multifunctionality occurred in the alpine meadow. Low values of multifunctionality were comparable in different types of grassland. Annual precipitation explained the large variation of multifunctionality across the different types of grassland in the transect, which showed a significantly positive effect on the multifunctionality. Grazing intensity further explained the rest of the variation in the multifunctionality(residuals), which showed a shift from neutral or positive to negative effects on multifunctionality across the different types of grassland. The consistently rapid declines of belowground biomass, SOC, and species richness resulted in the collapse of the multifunctionality as bare ground cover amounted to 75%, which corresponded to a multifunctionality value of 0.233. Our results are the first to show the spatial pattern of grassland multifunctionality. The rapid decline of the multifunctionality suggests that a collapse in the multifunctionality can occur after the vegetation cover decreases to 25%, which is also accompanied by rapid losses of species and other individual functions. Our results are expected to provide evidence and direction for the sustainable development of alpine grassland and restoration management. 展开更多
关键词 individual functions multifunctionality grazing intensity alpine grassland vegetation cover
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