[1]SHI Xiaoliang,YANG Zhiyong,WANG Xinshuang,et al.Maize Yield Estimation Based on Light Efficiency Model in Songnen Plain, Northeast China[J].Research of Soil and Water Conservation,2017,24(05):385-390.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 05
Page number:
385-390
Column:
Public date:
2017-10-28
- Title:
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Maize Yield Estimation Based on Light Efficiency Model in Songnen Plain, Northeast China
- Author(s):
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SHI Xiaoliang1, YANG Zhiyong2, WANG Xinshuang3, XUE Yumei1, LIU Feng1
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1. College of Geomatics, Xi’an University of Science and Technology, Xi’an 710054, China;
2. Department of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing 100038, China;
3. Shannxi Geomatics Center of National Administration of Surveying, Mapping and Geoinformation, Xi’an 710054, China
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- Keywords:
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Songnen Plain; maize yield; remote sensing; light use efficiency
- CLC:
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S127
- DOI:
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- Abstract:
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Regional estimation of crop yield is critical for many applications such as agricultural land management, food security and macro-control. In the paper, the accumulated aboveground dry biomass in maize growing season from May to September every year were estimated using the long time sequenced remote sensing and meteorological data from 2001 to 2013 based on light use efficiency. Finally, we built the estimation model of maize yield through converting the calculated ground dry biomass to yield by harvest index. The results showed that the estimated yields can meet the precision requirements for estimating crop yield on a great scale, and it was feasible to predict maize yield by crop biomass based on remote sensing. Average annual maize yield from 2001 to 2013 was 12 397.44 kg/hm2 in Songnen Plain, and the maize yield had increased over recent decades. There was significant spatial difference of maize yield, and the yield of the eastern part of the study area was higher than that of the western part. The spatial distribution of change trend of maize yield in study area from 2001 to 2013 was analyzed, which showed that about 91.7% of the study area presented an increasing yield trend, especially in the west of study area including Baicheng, Qiqihar, etc., where significant increase in maize yield had been seen. The maize yield had a significant positive correlation with the precipitation, and it had an obvious negative with temperature in the southern part of Songnen Plain.However, the maize yield had no obvious relationship with precipitation and temperature in the other area of the plain.