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Authors: 超级管理员 | Edit: tianfuyou
During the reporting period, winter wheat was harvested from early to mid-June, while summer maize was planted in late June.
The CropWatch Agroclimatic Indicators (CWAIs) show that radiation in this area was below average (RADPAR -2%), and the average temperature was unchanged(TEMP +0.0℃), but precipitation was above average (RAIN +11%), which brought the potential biomass above the 15YA by 4%. During the monitoring period, precipitation exceeded the 15-year maximum in early and late April, while the precipitation remained below average from early June to mid-July . According to the regional NDVI development map, the overall crop condition in the Loess region was slightly below the 5YA.
The NDVI departure cluster profiles indicate that crop conditions in most regions were below average in April. But approximately 50% of the regions recovered to close to average in late July. These regions are mainly distributed in most parts of northwestern Henan, Shaanxi and Shanxi provinces. About 7.2% of the region had above-average crop growth from April to May but it subsequently declined below the average in June. These regions are primarily concentrated in southwestern Shanxi and southern Shaanxi Province. The Maximum VCI map shows high VCIx values in most cropped areas of the region, with an average value of 0.84. The fraction of cropped arable land under cultivation is 96%, which remains consistent with the average of the 5YA. The CPIx in the region was 0.96, which is less than 1, and the crop production situation was generally normal.
Figure.a Crop condition development graph based on NDVI
Figure.b Spatial distribution of NDVI profiles
Figure.c Time series rainfall pofile
Figure.d Time series temperature pofile
Figure.e Maximum VCI
Figure.f Potential biomass departure from 5YA
Region | RAIN | TEMP | RADPAR | BIOMSS | Region | CALF | Maximum VCI | CPI | |||||
Current(mm) | Departure from 15YA(%) | Current(°C) | Departure from 15YA(°C) | Current(MJ/m2) | Departure from 15YA(%) | Current(gDM/m2) | Departure from 15YA(%) | Current(%) | Departure from 5YA(%) | Current | |||
Loess region | 315 | 11 | 17.1 | 0.0 | 1336 | -2 | 827 | 4 | Loess region | 96 | 0 | 0.84 | 0.96 |