
Bulletin
wall bulletinMenu
- Overview
- Country analysis
- Afghanistan
- Angola
- Argentina
- Australia
- Bangladesh
- Belarus
- Brazil
- Canada
- Germany
- Egypt
- Ethiopia
- France
- United Kingdom
- Hungary
- Indonesia
- India
- Iran
- Italy
- Kazakhstan
- Kenya
- Cambodia
- Sri Lanka
- Morocco
- Mexico
- Myanmar
- Mongolia
- Mozambique
- Nigeria
- Pakistan
- Philippines
- Poland
- Romania
- Russia
- Thailand
- Turkey
- Ukraine
- United States
- Uzbekistan
- Viet Nam
- South Africa
- Zambia
- Kyrgyzstan
- Algeria
Authors: 超级管理员 | Edit: zhuliang
This monitoring period covers the entire span from sowing to harvesting of Spring-Winter rice in the Mekong River Delta and rainy season rice in the North. In July, summer rice in Central Vietnam was harvested, followed by the planting of rainy season rice in August and September which will be harvested in November.
The proportion of irrigated cropland in Vietnam is 32%. Therefore, precipitation is an important factor controlling crop production. CropWatch agro-climatic indicators shows slightly decreased precipitation (1382 mm, -2%) and increased TEMP (24.1°C, +0.2°C) compared to the 15-year average. With the decreased precipitation, the BIOMSS (1508 gDM/m2, +2%) was higher mainly due to the significant increase in RADPAR (1170 MJ/m2, +6%). The VCIx was 0.93 and the CALF (97%, +0%) was at the 5YA. The cropping intensity was well above the 5YA (154%, +11%). The crop production index in this monitoring period was 1.16, which represented a favorable crop production situation.
Based on the NDVI development graph, the crop conditions were below the 5-year average throughout the whole monitoring period except for mid-July. Particularly in October, the NDVI showed a sharp drop which may have been caused by cloud cover in the satellite images. From July to early October, precipitation was generally near the 15YA and even surpassed the average in late September. But in mid-to-late October, the precipitation dropped to lower values. The temperature was above the 15-year average except for mid-October. As to the spatial distribution of NDVI profiles, crop conditions on about 37.4% of the country were close to the average, located mainly in Tuyen Quang, Cao Bang, Thai Binh, Thanh Hoa and Nam Dinh provinces.
Regional analysis
Based on cropping systems, climatic zones, and topographic conditions, Vietnam can be divided into several agro-ecological zones (AEZ): Central Highlands (208), Mekong River Delta (209), North Central Coas (202), North East (203), North West (207), Red River Delta (204), South Central Coast (206) and South East (205).
In the Central Highlands, the precipitation (1555 mm, 0%) and the temperature (22.5°C, -0.1°C) was near average. Because of the increased RADPAR (1081 MJ/m2, +5%), the BIOMSS also had a slight increase (1477 gDM/m2, +2%). The cropping intensity (98%) showed a sharp decrease of 22%. CALF was 100% and VCIx was 0.95. The crop condition development graph based on the NDVI indicates that the crop conditions fluctuated around the 5YA from July to August. In September and October, the NDVI was significantly below the 5YA. The crop conditions were expected to be close to the average.
In the Mekong River Delta, the TEMP was near the average (26.6°C, -0.1°C). Increased precipitation (1364 mm, 2%) and RADPAR (1234 MJ/m2, 2%) both resulted in a slight increase of BIOMSS. The cropping intensity was higher than the 5YA (179%, +3%). The CALF was 89% and the VCIx was 0.85. According to the NDVI-based development graph, the crop conditions were below the 5YA during the whole monitoring period. The crop conditions were expected to be slightly below average.
In the North Central Coast, due to decreased TEMP (23.6°C, -0.5°C), significantly increased RAIN (1546 mm, +10%) and RADPAR (1139 MJ/m2, +7%), the BIOMSS showed an increase compared to the 15YA (1482 gDM/m2, +2%). VCIx was 0.96 and CALF was 98%. The cropping intensity (140%) increased by 8%. According to the NDVI-based development graph, the crop conditions were simlar to the Central Highlands. During the early monitoring period, the NDVI was close to the 5YA, but it also dropped sharply in October which may have been caused by cloud cover in the satellite images. Crop production was expected to be close to the average.
In the North East, TEMP and RADPAR were both above the average (24.1°C, +0.7°C; 1180 MJ/m2, +7%). Although RAIN decreased (1360 mm, -11%), BIOMSS was still close to the average (1491 gDM/m2, +1%). The cropping intensity was higher than the 5YA (193%, +42%). CALF was 100% and VCIx was 0.97. According to the NDVI-based development graph, the NDVI was below the 5YA during the whole monitoring period. Overall, the crop conditions were estimated to be below the average.
In the North West, TEMP was above average (22.3°C, +0.5°C). Although the RADPAR (1179 MJ/m2) increased by 10%, the BIOMSS (1342 gDM/m2) was still lower by 2% because of decreased precipitation (1142 mm, -9%). The cropping intensity (149%) was increased by 22% and the CALF was 100%, the VCIx was 0.97. According to the agroclimatic indicators, crop conditions in this region were generally below the 5YA. At the Initial Stage of the monitoring, the NDVI was near the average level, but from August to October, the crop conditions were all below the 5YA. Overall, crop conditions in this region were below the average.
In the Red River Delta, due to an increased precipitation (1735 mm, +16%) and a high RADPAR (1222 MJ/m2, +6%), the BIOMSS (1635 gDM/m2) showed an increase of 2%. The TEMP was at an average level (26.5°C, +0.2°C). The CALF was 96% and the VCIx was 0.90. The region showed a high cropping intensity of 171, increased by 11% compared to the 5YA. According to the crop condition development graph, the NDVI was below the 5YA during the whole monitoring period. Based on the agroclimatic indicators, the crop conditions in this region were below the average.
In the South Central Coast, TEMP was above average (23.6°C, +0.3°C). Because of the increased RAIN (1408 mm, +7%) and RADPAR (1131 MJ/m2, +6%), the BIOMSS (1477 gDM/m2) increased by 7%. CALF was 97% and VCIx was 0.92. The cropping intensity was 128%, with a drop of 8%. According to the crop condition development graph, the NDVI was above the 5YA from July to August. The crop conditions showed a declining trend in the late monitoring period, particularly in October, the NDVI dropped sharply which may have been caused by cloud cover in the satellite images. Crop conditions were expected to be favorable.
In South East, increased TEMP (25.3°C, 0.2°C), sharply decreased RAIN (1432 mm, -10%), increased RADPAR (1215 MJ/m2, +5%) all resulted in increased BIOMSS (1560 gDM/m2, +1%). CALF was 96% and VCIx was 0.90. The cropping intensity (122%) decreased by 4%. According to the crop condition development graph, the NDVI was below the 5YA because of the influence of the clouds in the satellite images. Crop production in this region was slightly below the average.
Figure 3.45 Vietnam's crop conditions, July – October 2022
(a). Phenology of major crops
(b) Crop condition development graph based on NDVI
(c) Maximum VCI
(d) Spatial NDVI patterns compared to 5YA (e) NDVI profiles
(f) Rainfall profiles (g) Temperature profiles
(h) Crop condition development graph based on NDVI Central Highlands Vietnam (left), and Mekong River Delta (right).
(i) Crop condition development graph based on NDVI North Central Coast Vietnam (left), and North East Vietnam (right).
(j) Crop condition development graph based on NDVI North West Vietnam (left), and Red River Delta (right).
(k) Crop condition development graph based on NDVI South Central Coast Vietnam (left), and South East Vietnam (right).
(l) Proportion of NDVI anomaly categories compared with 5YA
(m) Proportion of VHIm categories compared with 5YA
(n) cropping intensity
Table 3.80 Vietnam's agroclimatic indicators by sub-national regions, current season's values and departure from 15YA, July – October 2022
RAIN | TEMP | RADPAR | BIOMSS | |||||
Region | Current (mm) | Departure from 15YA (%) | Current (°C) | Departure from 15YA (°C) | Current (MJ/m2) | Departure from 15YA (%) | Current (gDM/m2) | Departure from 15YA (%) |
Central Highlands | 1555 | 0 | 22.5 | -0.1 | 1081 | 5 | 1477 | 2 |
Mekong River Delta | 1364 | 2 | 26.6 | -0.1 | 1234 | 2 | 1706 | 1 |
North Central Coast | 1546 | 10 | 23.6 | 0.0 | 1139 | 7 | 1482 | 2 |
North East | 1360 | -11 | 24.1 | 0.7 | 1180 | 7 | 1491 | 1 |
North West | 1142 | -9 | 22.3 | 0.5 | 1179 | 10 | 1342 | -2 |
Red River Delta | 1735 | 16 | 26.5 | 0.2 | 1222 | 6 | 1635 | 2 |
South Central Coast | 1408 | 7 | 23.6 | 0.3 | 1131 | 6 | 1477 | 7 |
South East | 1432 | -10 | 25.3 | 0.2 | 1215 | 5 | 1560 | 1 |
Table 3.81 Vietnam's agronomic indicators by sub-national regions, current season's values and departure from 5YA, July – October 2022
Region | CALF | Cropping Intensity | Maximum VCI | ||
Current(%) | Departure from 5YA (%) | Current(%) | Departure from 5YA (%) | Current | |
Central Highlands | 100 | 0 | 98 | -22 | 0.95 |
Mekong River Delta | 89 | 0 | 179 | 3 | 0.85 |
North Central Coast | 98 | 0 | 140 | 8 | 0.96 |
North East | 100 | 0 | 193 | 42 | 0.97 |
North West | 100 | 0 | 149 | 22 | 0.97 |
Red River Delta | 96 | 0 | 171 | 11 | 0.90 |
South Central Coast | 97 | 0 | 128 | -8 | 0.92 |
South East | 96 | 0 | 122 | -4 | 0.90 |