Since mid-September, meteorological conditions in most parts of the country have been generally beneficial to the autumn harvest. Up to now, the national autumn harvest autumn work is nearing completion. Among them, the harvest of food crops in the main autumn harvest areas of the country has basically ended; the winter wheat planting in the north has been completed, and the autumn work in the south is at a climax stage. Late rice in most of the south of the Yangtze River and South China is still in the stage of grain filling and milk ripening. Late rice in the northern part of the Yangtze River and parts of Hainan has matured and harvested; cotton is at the end of picking. It is expected that in the next 10 days, most of the northern winter wheat areas will be close to the same period of the year or slightly lower, and the lyrical situation is suitable, which is beneficial to the emergence and seedling growth of winter wheat. The temperature in most parts of the south is close to normal, which is beneficial to the sowing and emergence of winter wheat and rapeseed; Most of the precipitation is more unfavorable for the late harvesting of late rice.
First, during the autumn harvest, most of the country's agricultural areas have fine weather, and the crops are ripe and harvested smoothly
Since mid-September, most of the temperature in the northeastern region and the central and eastern Inner Mongolia is close to normal or high 1-2 °C, and the sunshine is sufficient, which is conducive to the full filling and mature harvesting of spring corn, rice, soybean, potato and other crops. On September 25-27 and October 1-4, most of the precipitation in the northeastern region was not conducive to the late maturity of the crops and the drying of the seeds, and the harvest progress was temporarily blocked. From September 17 to 21, early frost appeared in some forest areas in northeastern Inner Mongolia and northwestern Heilongjiang, and the first frost period was close to normal, with no impact on crops. After September 22, frost appeared in the central and eastern Inner Mongolia, most of Heilongjiang, Jilin and parts of western Liaoning, but most of the autumn harvest crops such as spring corn, soybean, and first-season rice have entered maturity and are harvested successively, and most of Heilongjiang harvested. The progress is close to normal or early, and the days of frost in most of Jilin and western Liaoning are only 6-8 days. The frost has little impact on crops in Northeast China.
Since mid-September, Xinjiang's agricultural areas have better light and heat conditions, and the sensation is suitable. The initial frost period in most areas is close to normal or slightly late, which is conducive to mature corn harvest, cotton cracking and picking. In mid-September, the temperature in northern Xinjiang was low, and in the northern part of Xinjiang from 14 to 15 days, early frost appeared, and cotton bolls and corn maturity were slightly affected.
The eastern part of the northwestern region, north China, and Huanghuai have had fine weather since mid-September, which is conducive to the full filling and maturity of the autumn harvest crops. The precipitation process from September 17 to 21, 24 to 25, and the low temperature in late September have certain adverse effects on the normal maturity of the late-maturing crops and the harvesting and drying of mature crops. The autumn harvest in some areas has been slightly delayed; It causes cotton bolls to fall off and rotten peaches to increase in some areas, which affects cotton yield and quality.
Since mid-September, Jianghuai and Jianghan have been dominated by fine weather, with temperatures approaching normal years and appropriate sensation, which is conducive to the maturity and harvesting of autumn crops such as rice and the picking of cotton bolls.
The weather in the south of the Yangtze River and most of the south of the Yangtze River is more than normal. The temperature is relatively close to normal in most of the time, which is conducive to the mature harvesting of rice and other rice crops in a season. However, in late September and mid-October, there were more precipitation in parts of Jiangnan and southern China, and there were periods of rainy and sloppy weather. In late September, the temperature was low, and the late rice areas in central and southern Hunan and northwestern Jiangxi appeared 3 to 6 days light to moderate. Cold dew wind; adversely affects the ripening of a season of rice, the picking of cotton bolls, and the earing, flowering and fruiting and grain filling of late rice.
In the middle and late September, the temperature in the north-central part of the southwestern region is high, the precipitation is close to normal or less, the sunshine conditions are better, and the crops such as corn and one-season rice are harvested smoothly. In the middle and southwest of southwestern China, the rainy and oligo-free weather in the southwestern region last year It is not good to dry and store the crops.
Second, in the autumn sowing period, most of the agricultural areas have suitable soil moisture conditions, and the heat conditions are good, which is conducive to the sowing and emergence of autumn-sown crops and the growth of seedlings
From August to early September, the cumulative precipitation in the northern winter wheat area is generally 100-200 mm, with precipitation in the southeastern part of North China, Huanghuai and the southeastern part of the northwest reaching 200-400 mm, which is 50% to 1 times more than normal. Conducive to soil growth and conservation. Since mid-September, winter wheat in the north has been planted successively. Most of the soil in the wheat-seeding area has good moisture conditions, and the light and temperature conditions are good. The winter wheat is planted and seeded smoothly. However, some farmland soils in the western part of Huanghuai are too wet, and the winter wheat seedling emergence and seedling growth are affected.
Winter wheat in Jianghuai, Jianghan and Southwest China began to be planted in mid-October. At present, most of the areas are suitable for ploughing, which is conducive to timely planting of winter wheat. The rainy weather in the south-central southwestern part of the country is too wet for farmland in some areas, which is not conducive to the winter wheat seeding.
The oilseed rape producing area in the Yangtze River Basin has been in good condition since mid-September, and the soil moisture is suitable. The rapeseed is planted and transplanted smoothly. In some areas, the farmland soil is too wet, and the seeding and emergence of live rapeseed is adversely affected.
Third, the impact of future weather on autumn harvest autumn seeds and agricultural production recommendations
It is estimated that in the next 10 days, the temperature in most parts of China will be close to the same period of the year or slightly higher. The temperature in the eastern part of North China, Huanghuai and Jianghuai will be lower by 1~2 °C. The eastern part of the northwestern region, North China, Huanghuai, Jianghuai, and the central and eastern parts of the Yangtze River have 5 to 15 mm; the rainfall in some parts of South China, the western part of the Yangtze River and the Yunnan-Guizhou Plateau is 40-90 mm. The precipitation in most of the above areas is more than normal. More than 2 to 5 percent. From 23 to 26, a large-scale windy and precipitation weather process will occur in the central and eastern regions of China, and the temperature will drop by 6-10 °C.
The northern part of North China, Huanghuai, Jianghan and Jianghuai areas are mainly sunny and sunny, suitable for autumn harvesting and cotton picking, winter wheat sowing and seedling growth and seedling growth. The rainy weather in the south-central southwestern part of the country has further expanded and aggravated the range and extent of the rainy weather, which is not conducive to the timely planting of grain crops, rapeseed and other autumn crops and the preparation of winter wheat.
There are many precipitations in the western part of the Yangtze River and most of southern China. The rainfall in the south of China will reach 100-250 mm, which will have certain adverse effects on grain filling of late rice and harvesting of mature late rice.
Around the 26th, early frost will appear in parts of central and southern Shaanxi, southwestern Shanxi, southern Hebei, Shandong, Henan, northern Jiangsu, and northern Anhui. In the south-central Shaanxi, southern Henan, southern Shandong, northern Jiangsu, and northern Anhui, the first frost date is about 5 days earlier than normal, which is unfavorable for the sowing and emergence of winter wheat and the growth of rapeseed seedlings in these areas. And frost has little effect on winter wheat and canola.
Fourth, agricultural production recommendations
(1) The winter wheat area that has not been planted in the north should use good sensation and recent fine weather to speed up the planting schedule; the planted area should strengthen the field management, timely suppression after sowing, antifreeze and protection, and prevent the adverse effects of low temperature and frost. In order to check out the seedlings, it is necessary to check the seedlings in time to ensure that the wheat seedlings are fully seeded. And pay attention to timely watering and fertilization, timely slashing and protecting the sputum, in order to promote the rooting of the wheat seedlings, and strive to form strong seedlings before winter.
(2) In the area south of the Huaihe River, it is necessary to grasp the favorable weather and prepare the land for planting, timely planting winter wheat and rapeseed, and strengthen field management to promote the growth of rapeseed seedlings.
(3) In the south-central southwestern part of the southwestern part of the Yangtze River and parts of the Yangtze River along the Yangtze River, it is necessary to dilute the ground in time to provide favorable conditions for the transplanting of rapeseed and the sowing of winter wheat. At the same time, the weather should be seized and planted at the right time.
(4) Jiangnan and South China should strengthen the management of late rice in the late period to ensure that the late rice is fully grouted; some parts of the south of the Yangtze River and the late rice in Hainan have matured one after another, and should catch the fine weather or the rain gap to grab the late rice.
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