Bulletin

wall bulletin
HuanghuaihaiChina

Authors: Albert_Ye | Edit: lirui

Maize, rice, groundnut and soybean were the main crops that grew in this monitoring period (July to October 2024) in Huanghuaihai. Summer maize reached maturity in late September to early October. Agro-climatic indicators show that accumulated rainfall, temperature (ΔRAIN +58%, ΔTEMP +1.1°C) were above average and radiation(ΔRADPAR -1%) was below average, which resulted in a 17% increase in crop biomass production potential.

According to the NDVI development graph, crop conditions were unfavorable and maize establishment was delayed due to the localized flooding in July. This caused a shift in the NDVI development curve and the peak value exceeded the average in late August. Above-average temperatures were observed in early September which benefited the maturation of maize, NDVI also reached the 5-year maximum. As shown in the NDVI departure clustering map,10.7% of the cultivated land was always below the average affected by the abrupt change from drought to flood. They were mainly located in northern Jiangsu, southern Shandong, and northern Anhui. On 25.5% of the cropped area, located in central Shandong, the coastal areas in Shandong, and the Langfang area in Hebei typhoons had a short negative impact on crop growth. These areas  recovered quickly after mid-August. The VCIx map showed that crop condition was negative around Xiaoxian County in Anhui, Shangqiu City in Henan, and Linyi City in Shandong, while the rest of the region was close to the average.

The CALF remained unchanged, and the maximum VCI value was 0.92. The Crop Production Index (CPI) is 1.0. Generally, the crop growth in the whole region was normal.


(a) Crop condition development graph based on NDVI 

(b) Spatial NDVI patterns compared to 5YA   (c) NDVI profiles

(d)Time series rainfall profile

(e)Time series temperature profile

(f) Maximum VCI

(g) Biomass departure