In mid-September, the average temperature in the whole district was normally high, and most of the sunshine hours in the first half of the year were normal to the majority. It was beneficial to the growth and development of most late rice tillers, young spikes, and booting in Guangxi. At the end of the year, affected by cold air, there was a relatively obvious rainfall weather process in Guangxi, and the drought situation was alleviated. However, rainfall in most areas continued to be less, due to uneven spatial and temporal distribution of rainfall and insufficient effective rainfall, drought in some areas such as Hechi City remained continued. In addition, since the 19th , there have been cold weather in the northeast of Guangxi and other places with an average daily temperature of ≤ 22 °C, which has an adverse effect on the growth and development of the late rice at the heading and flowering stage. It is expected that the average temperature in the whole part of September will be normal in most of the district; the total rainfall in the whole district will be less than 5 - 80 %.
First, mid-September weather overview
Affected by cold air, the temperature in our district dropped on the 19th and 20th , and the low temperature weather with an average daily temperature of ≤ 22 °C appeared in the northeast of Guangxi, and most of the whole area had showers or thunderstorms, and parts of northeast Guangxi and northwest Guangxi Heavy rain and heavy rain occurred in parts of southern Guangxi.
Temperature: The average temperature in mid-September is except for the Baise City except the Youjiang River Valley, the northwestern part of Hechi City, the northeastern part of Guilin City, and Fuchuan, Sanjiang, Rong'an, Jinxiu, Luocheng, Tiantian, etc. 22.4-25.9 °C The rest of the region is 26.0 - 29.1 °C; compared with the same period of the same year, Lingshan, Bobai, Nanning and other places are normally 0.4 °C lower , Baise City, Zhangzhou City and most of Guigang City, southern Liuzhou City, southeast of Hechi City, Nanning Some counties and cities in the northern part of the city and Yulin are 1.1-2.5 °C high , and most other counties and cities are 0.1-1.0 °C higher . The extreme minimum temperature in the region was 14.1 - 23.9 °C. Most of the district appeared on the 20th and partially appeared on the 11th or 16th .
Rainfall: Mid-September rainfall in some coastal counties and cities and Lingshan, Pubei and other places 135.2-146.4 mm, Sanjiang, Luzhai, Leye, Debao, Bobai, Hengxian, Suining and Shangsi and other places 50.0-80.2 mm , Hezhou City, Zhangzhou City, Yulin City, Chongzuo City, Baise City and other cities and counties and Rongan, Zhapu, Laibin, Hepu, Qinzhou, Nanning, Longan, Fengshan and other places 25.0-49.9 mm, the rest of Guangxi Most of the counties and cities are 0.0-24.9 mm; compared with the same period of the previous year, Luzhai, Lingshan, and Pubei are 2-3 times more, and Sanjiang, Hezhou, Zhangzhou, Tengxian, Hengxian, Suining and other places are more than 1.1-1.9. Times, some cities and towns in Fangchenggang and Yulin City, Nanning City and Chongzuo City, as well as Lingui, Yangshuo, Zhangpu, Fuchuan, Rongan, Laibin, Guigang, Qinzhou, Leye, Debao and other places are more than 1-10 Cheng, the rest of the majority of the region is less than 1 - 10 %. The number of rainy days in the whole area is 2-6 days in the whole district , 0-1 days in the northern part of Guibei , and 7-8 days in Fangcheng and Dongxing . Compared with the same period of the year, most of the districts are less than 1-3 days, and some coastal counties The city is more than 1-4 days.
Sunshine: sunshine in mid-September when the number of the region's 39--90 hours with the same period the year than normal to above normal most of the region's 40 percent, and the northeastern Guangxi Guinan local partial 10% less.
2. Review of crop growth status and agro-meteorological conditions in mid-September
Late rice: panicle initiation most - booting stage, heading the local Northern        Spring planting sugarcane: stem elongation
In mid-September, the average temperature in the whole district was normally high, and most of the sunshine hours in the first half of the year were normal. Most of them were high in the mid-nine period, and the sunshine was sufficient. Some counties and cities in the southern coastal areas of Guangxi had slight rainfall, and most of the late-season rice in Guangxi were divided into young and old. Spike differentiation, booting and other crop growth and development, as well as the development of the work of the exposed field, is also conducive to the prevention and control of crop diseases and insect pests. On the 18th to 19th , due to the influence of cold air, the temperature in Guangxi declined. Most of the whole area experienced showers or thunderstorms. Heavy rain or heavy rain occurred in parts of northeast Guangxi and parts of northwest Guangxi and coastal areas. The drought in Guangxi was relieved, and the rainfall was local. The growth of crops and autumn crops is favorable; however, rainfall in most parts of Guangxi continues to be less, due to uneven spatial and temporal distribution of rainfall, insufficient rainfall in some areas, and drought in some areas such as Hechi City continues to persist. The growth of the conditional crops and the fruit development of fruit trees such as mandarin, orange, and pomelo, as well as the adverse effects of autumn work. In addition, since the 19th , there have been cold weather in the northeast of Guangxi and other places with an average daily temperature of ≤ 22 °C, which has an adverse effect on the growth and development of the late rice at the heading and flowering stage. According to Department of Agriculture statistics, as of September 15, 2011, an area of 223,653.3 hectares of crops affected by drought, disaster area of 41,873.3 hectares, an area of 7360 hectares of crops. The main affected crops include rice, corn, sugar cane and so on.
Third, the weather forecast in late September
It is expected that the average temperature in the whole part of September will be normal in most of the district; the total rainfall in the whole district will be less than 5 - 80 %. Main weather process: On the 21st to 30th , the whole area is dominated by cloudy weather, with showers in the northwest of Guangxi. The specific forecast for the average temperature and seasonal rainfall in the whole district is as follows:
The average temperature in the past : Guilin 23.5-24.5 °C, Hechi, Zhangzhou , Baise, Laibin, Hezhou 2 4.5-25.5 °C, Nanning, Liuzhou, Yulin, Qinzhou, Guigang, Beihai, Chongzuo, Fangchenggang 25.5-26.5 °C.
Seasonal rainfall: Hechi, Baise 5-15 mm, Nanning, Guilin, Liuzhou, Zhangzhou, Yulin, Qinzhou, Laibin, Hezhou, Guigang, Beihai, Chongzuo, Fangchenggang 1-10 mm.
Fourth, production recommendations
 1. Strengthen the management of late rice fields. This year, Guangxi has a large proportion of late rice late transplanting. All localities should earnestly manage the management of late rice fields. According to the growth of seedlings, they should do a good job of “one attack and three sprays†in a timely manner, especially to strengthen the management of water and fertilizer in late rice fields with late insertion and growth bias to promote seedlings. Robust growth and young ear development, and strive to balance production, at the same time, all parts of the area, especially in northern Guangxi, should pay attention to the preparations for the prevention of cold dew. In cold weather, you should pay attention to the use of irrigation and temperature adjustment, or spraying foliar fertilizer, etc. Various cold-proof technical measures to improve the cold resistance of the seedlings and reduce the effects of low temperature and cold damage. In addition, all localities should effectively monitor the prevention and control of pests and diseases.
2 , drought and drought relief work can still not relax. At present, the drought in Guangxi has eased, but the drought in some areas is still continuing. It is expected that the rainfall will still be less in the second half of September. All localities should do a good job in drought prevention and drought relief of dryland crops, fruit trees and vegetables, and should pay attention to grasping every favorable opportunity in time. Artificial rainfall enhancement operations, and strengthen the scientific dispatch management of existing water sources to ensure the demand for agricultural production water.
3. Grasp the cultivation of autumn dryland crops. All localities should pay attention to grasping the favorable timing of the current rainfall, continue to plant autumn dryland crops, maximize the planting area, and do a good job in field management of dry farming.
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