Through observing the phenology of two kinds of fruit trees,apple and peach trees,during their flowering periods in the past seven years,the meteorological conditions in the flowering stages were analyzed and summariz...Through observing the phenology of two kinds of fruit trees,apple and peach trees,during their flowering periods in the past seven years,the meteorological conditions in the flowering stages were analyzed and summarized in this paper.The late frost weather situation occurred in late April in Haiyang City also was elaborated in the paper.According to the data analysis,the terrain effect had induced a large temperature differences between north and south in April in Haiyang.Early flowering of fruit trees is as early as 5 to 8 days in the northern region than that in the southern region;accumulated temperature which was greater than or equal to 0 ℃ and the date of the temperature stably through a boundary,were the important meteorological indicators of the fruit trees' early flowering.The late frost in mid-late April is meteorological disasters of the fruit trees flowering period.The weather background of the occurred late frost,the disaster reasons and the measures for the prevention of late frost were proposed.展开更多
在使用遥感技术进行果区研究时,首先需先进行果树树种的识别,否则会导致张冠李戴的现象,而不同果树花器在性状上较叶片更容易区分,因此在花期对果树树种进行识别是即经济又有效的方法。然而目前对果树花期数据的采集,多数为单品系的花...在使用遥感技术进行果区研究时,首先需先进行果树树种的识别,否则会导致张冠李戴的现象,而不同果树花器在性状上较叶片更容易区分,因此在花期对果树树种进行识别是即经济又有效的方法。然而目前对果树花期数据的采集,多数为单品系的花期图像或光谱数据,对于果树花器的数据采集极少,多品种的数据采集也仅限于室外冠层光谱数据,同时采集室内和室外光谱和图像数据的研究较少。基于以上原因,利用ASD Field Spec3便携式光谱分析仪采集了梨花、苹果花、杏花3种果树花期室内和室外的光谱数据,为记录花朵状态同时采集了果树花期室内和室外图像数据集,为今后探寻利用地面光谱测试数据对果树树种进行科学识别提供数据基础。展开更多
文摘Through observing the phenology of two kinds of fruit trees,apple and peach trees,during their flowering periods in the past seven years,the meteorological conditions in the flowering stages were analyzed and summarized in this paper.The late frost weather situation occurred in late April in Haiyang City also was elaborated in the paper.According to the data analysis,the terrain effect had induced a large temperature differences between north and south in April in Haiyang.Early flowering of fruit trees is as early as 5 to 8 days in the northern region than that in the southern region;accumulated temperature which was greater than or equal to 0 ℃ and the date of the temperature stably through a boundary,were the important meteorological indicators of the fruit trees' early flowering.The late frost in mid-late April is meteorological disasters of the fruit trees flowering period.The weather background of the occurred late frost,the disaster reasons and the measures for the prevention of late frost were proposed.
文摘在使用遥感技术进行果区研究时,首先需先进行果树树种的识别,否则会导致张冠李戴的现象,而不同果树花器在性状上较叶片更容易区分,因此在花期对果树树种进行识别是即经济又有效的方法。然而目前对果树花期数据的采集,多数为单品系的花期图像或光谱数据,对于果树花器的数据采集极少,多品种的数据采集也仅限于室外冠层光谱数据,同时采集室内和室外光谱和图像数据的研究较少。基于以上原因,利用ASD Field Spec3便携式光谱分析仪采集了梨花、苹果花、杏花3种果树花期室内和室外的光谱数据,为记录花朵状态同时采集了果树花期室内和室外图像数据集,为今后探寻利用地面光谱测试数据对果树树种进行科学识别提供数据基础。
