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小麦估产
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  “小麦估产”译为未确定词的双语例句
     Themore vigorous wheat field the higher reflectivity within the near-infrared range,whereas the lower the reflectivity within the visible band. Therefore, the ratio NIR/VIS is valuable to the estimation of wheat yield.
     结果表明,长势越好的麦田在近红外波段的反射率越高,而在可见光波段的反射率却越低,为此NIR/VIS此值对小麦估产是有用的数据.
短句来源
     The estimation of wheat yield in Tianjin area was made through the establishmenf of the spectrumyield model, the data was obtained by using the NOAA AVHRR Channel1 (visible) and Channel2 (nearinfrared), The accuracy is higher 90%.
     运用NOAA卫星AVHRR传感器的第一通道(可见光)和第二通道(近红外)的资料,建立光谱产量模武对天津地区进行小麦估产,准确率达90%以上.
短句来源
     According to the relationship between the growing characters and yield of winter wheat, it was determined that the best stage to monitor the yield by remote sensing was from blossom to filling. GDVI was derived and analyzed from the TM image, and the model was set up to express the relation between GDVI and yield of wheat, which was available to accomplish the estimation of yield.
     根据冬小麦生长特点与产量的关系,认为小麦扬花期至灌浆期为最佳监测时期,利用遥感影像(TM)进行了绿度指数(GDVI)计算与分析,建立了GDVI与小麦产量的关系,完成了小麦估产
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  相似匹配句对
     A STUDY ON THE REGIONALIZATION FOR ESTIMATING THE WHEAT YIELD OF CHINA BY USING REMOTE SENSING DATA
     中国小麦遥感估产区划研究
短句来源
     SPECTRAL REFLECTIVE CHARACTERISTLCS OF WHEAT AND THE ESTIMATION OF WHEAT YIELD
     小麦反射光谱特性及其估产
短句来源
     , wheat ( Triticum aestivum L. )
     、小麦(Triticumaestivum L.)
短句来源
     Sister Chromatid Exchanges In Wheat
     小麦的姐妹染色单体交换
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  wheat yield estimation
According to the actual demands of wheat yield estimation by remote sensing and wheat agroclimatic demarcation of China, this paper first puts forward some principles upheld in this regionalization and analyses its main bases.
      


By means of the measurement of spectral reflectivity of wheat and soil, this paper analyzed the spectral reflective characteristics of wheat and soil in several wheat field in different growing stage and different growing vigour. Themore vigorous wheat field the higher reflectivity within the near-infrared range,whereas the lower the reflectivity within the visible band. Therefore, the ratio NIR/VIS is valuable to the estimation of wheat yield. The estimation of wheat yield in Tianjin area was made through the...

By means of the measurement of spectral reflectivity of wheat and soil, this paper analyzed the spectral reflective characteristics of wheat and soil in several wheat field in different growing stage and different growing vigour. Themore vigorous wheat field the higher reflectivity within the near-infrared range,whereas the lower the reflectivity within the visible band. Therefore, the ratio NIR/VIS is valuable to the estimation of wheat yield. The estimation of wheat yield in Tianjin area was made through the establishmenf of the spectrumyield model, the data was obtained by using the NOAA AVHRR Channel1 (visible) and Channel2 (nearinfrared), The accuracy is higher 90%.

本文通过小麦和土壤光谱反射率测定,分析了不同生育期、不同长势麦田的光谱特性.结果表明,长势越好的麦田在近红外波段的反射率越高,而在可见光波段的反射率却越低,为此NIR/VIS此值对小麦估产是有用的数据.运用NOAA卫星AVHRR传感器的第一通道(可见光)和第二通道(近红外)的资料,建立光谱产量模武对天津地区进行小麦估产,准确率达90%以上.

According to the relationship between the growing characters and yield of winter wheat, it was determined that the best stage to monitor the yield by remote sensing was from blossom to filling. GDVI was derived and analyzed from the TM image, and the model was set up to express the relation between GDVI and yield of wheat, which was available to accomplish the estimation of yield. The results showed that the estimating precision was more than 88.90%.

根据冬小麦生长特点与产量的关系,认为小麦扬花期至灌浆期为最佳监测时期,利用遥感影像(TM)进行了绿度指数(GDVI)计算与分析,建立了GDVI与小麦产量的关系,完成了小麦估产。通过与实际产量进行比较,其估产精度可达88.90%以上。

For estimating the yield of wheat,and for crop growth monitoring by using hyperspectral remote sensing,it is very important to quantitatively determine the chlorophyll and water contents in live leaf of winter wheat.In the range of 350-1 650 nm,the reflectance spectrum of winter wheat's leaf in different growth periods were scanned by ASD FieldSpec Pro FR portable spectrometer and LI-COR 1800 integrating spheres.Partial least squares method was used to develop the quantitative analysis models for chlorophyll...

For estimating the yield of wheat,and for crop growth monitoring by using hyperspectral remote sensing,it is very important to quantitatively determine the chlorophyll and water contents in live leaf of winter wheat.In the range of 350-1 650 nm,the reflectance spectrum of winter wheat's leaf in different growth periods were scanned by ASD FieldSpec Pro FR portable spectrometer and LI-COR 1800 integrating spheres.Partial least squares method was used to develop the quantitative analysis models for chlorophyll and water contents with reflectance spectroscopy.The model of chlorophyll content with reflectance spectroscopy was built in the range of 400-750 nm,and the results show that the correlation coefficient between the estimated values and the real values is 0.898,and relative standard deviation is 13.6%.The model of water content with reflectance spectroscopy was built in the range of 1 400-1 600 nm,and the results indicate that the correlation coefficient between the estimated values and the real values is 0.999,and relative standard deviation is 0.3%.These results are satisfying in agricultural production.

定量测定小麦活体叶片的叶绿素含量和水分含量,在小麦估产、农情监测等方面具有重要的意义,同时可为进行高光谱遥感提供基础。文章使用ASD便携式光谱仪和LI-COR 1800型积分球,在350~1650nm的光谱范围内,测量冬小麦叶片在不同生长期的反射光谱,用偏最小二乘方法建立了冬小麦叶片叶绿素和水分含量与反射光谱的定量分析模型。在400~750 nm的光谱范围,建立了叶绿素含量与反射光谱的模型,结果为:叶绿素的预测值与真实值的相关系数为0.898,相对标准偏差为13.6%。在1400~1600 nm的光谱范围,建立了水分含量与反射光谱的模型,其结果为:水分的预测值与真实值的相关系数为0.999,相对标准偏差为0.3%。在农业生产中,这些结果是满意的。

 
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