What is double-cropping late rice?

Question 1: What is double-cropping rice? Single crop? The so-called double-cropping rice means that rice can be sown and harvested twice on the same land within one year.

Whether a place can plant double-cropping rice depends on whether its thermal conditions can meet the needs of double-cropping rice growth, and also depends on several safe periods, such as safe sowing period, safe transplanting period, safe booting period and safe heading period at night. Therefore, not all land can grow double-cropping rice.

A rice planting system in which only one season of rice is planted every year. It is mainly distributed in Qinling Mountains, north of Huaihe River, north of Yangtze River Basin, Sichuan Basin and Yunnan-Guizhou-Gaoyuan, and it is also planted in some hilly areas in the south.

Single-season rice can be divided into single-season early rice, middle rice and late rice. In winter, paddy fields and high-altitude areas in the south are fallow in winter, and only one season of rice is planted every year. Generally, the early, middle and late rice in a single season is replanted with other dry crops, forming a double cropping or triple cropping system. Double cropping system a year, generally the first season is winter crops such as wheat, rape, broad beans and green manure, and the second season is single-season middle-late rice, with rice and wheat being the most common; There are also spring crops, such as soybeans, peanuts, corn, tobacco, melons and vegetables, and the second crop is single-season middle and late rice. The first crop is single-season early rice, and the second crop is aquatic crops such as water chestnut, purple valley and Alisma orientalis. Three crops a year, generally the first crop is winter crop, the second crop is single-season early rice, and the third crop is autumn crop, such as soybean, peanut, corn, sweet potato and jute.

Selecting single-season rice, early-maturing japonica rice or early-maturing japonica rice varieties insensitive to light response in the north; In southern China, indica rice varieties with high quality, early maturity and high temperature resistance at flowering stage are mainly selected for early and middle rice in one season, and late indica rice and japonica rice varieties sensitive to short-day response are selected for late rice in one season. Single-season late rice has strict requirements for short sunshine, so it is not suitable for early sowing and early planting.

Question 2: How to classify early rice, middle rice, one-season late rice and double-season late rice japonica rice? Generally classified by planting time.

Question 3: What are single night, double night, hybrid rice, early rice, early hybrid rice and middle rice? Can you specifically introduce that single night is a single-season late rice?

Double night is double late rice.

Hybrid rice refers to the first generation of seeds produced by parents' hybridization (through scientific selection) of rice. Because of its obvious "heterosis", the effect of increasing production is very prominent. The first generation of hybrid combinations with strong advantages produced by crossing two rice varieties (lines) with different genetic composition. The genotype of hybrid rice is hybrid storage, and the cytoplasm comes from the female parent and half from the nuclear parent. Because the hybrid individuals have the same genetic type and uniform population traits, they can be used as production seeds. However, from the second generation, the characters were separated, the growth was irregular, the advantages were reduced, and the yield was reduced, so it was generally impossible to continue to be used as seeds. Therefore, it is necessary to carry out productive seed production every year to obtain a large number of hybrid seeds for production.

Early rice: Southern indica rice with early cultivation time and early maturity.

Early hybrid rice: early rice+hybrid rice

Semi-late-maturing mid-season rice is a mid-season rice between early maturity and late maturity. Generally mature in early autumn,

Question 4: What is the significance of double-cropping late rice in agriculture? 1. A kind of rice with long growth period and late maturity, which is usually harvested after the first frost.

"Seventy Rhymes of Li Yang Story" in Yuxi, Liu Tang: "Yellow rice is piled in the field, and winter jasmine is seen in the hedge." Don Yan Qian's poem "Crab": "The lake is clear in October, and the fragrant crabs are like tigers at the beginning of late rice." Mao Dun's Lin Family Tree II: "The late rice harvested by rural people more than a month ago has already been forced out by landlords and usurers."

2. It refers to late rice.

3. Generally, after harvesting early rice, the cultivated rice has a long production cycle and tastes better than early rice, but not as good as mid-season rice.

Question 5: When are the early rice and late rice planted? What is upland rice? early rice

The suitable sowing date of early rice is: the daily average temperature is higher than 65438 02 degrees Celsius for three consecutive days, and the suitable sowing date in the Yangtze River basin is from late March to early April. With the increase of latitude and altitude and the decrease of temperature, the sowing date will be postponed.

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late rice

A crop with long growth period and late maturity is usually harvested after the first frost.

Average late rice 150 ~ 170 days. Due to the different climatic conditions in different regions, their sowing dates and harvest seasons are also very different.

Dried rice

Upland rice is drought-tolerant and suitable for dry land planting, also known as upland rice, which generally refers to cultivated rice that can adapt to the growth in boundless dry land, sloping land and arid ecological environment, and is a variety of rice.

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Question 6: Double cropping rice is generally planted in the Yangtze River basin and the south. The stems of early rice and late rice are the same. If you want to grow the same thing, you should ask the local agricultural technology station, because the varieties in each province are different.

Question 7: Is Chongqing Hechuan rice a season or a double season? Because Chongqing Hechuan belongs to the southwest region, double-cropping rice is planted.

Rice planting areas are:

The northernmost limit of rice growth is Huma, Heilongjiang Province, China. However, the main planting areas are southern China, Taiwan Province Province of China, China, Japan, Korean Peninsula, Southeast Asia, South Asia, Mediterranean coast, southeastern United States, Central America, Oceania and parts of Africa, and rice is also planted along the river in northern China. In other words, rice grows almost everywhere except Antarctica.

1. South China double cropping rice planting area is located in the south of Nanling, the southernmost part of China. Include southern Fujian, Guangdong, Guangxi and Yunnan, as well as Taiwan Province, Hainan and Nanhai islands.

2. The double cropping rice area in Central China is the largest rice planting area in China, starting from the coast of the East China Sea in the east, reaching the western edge of Chengdu Plain in the west, Nanling in the south and Huaihe River in the Qinling Mountains in the north.

3. The planting location of single and double cropping rice in southwest plateau is located in Yunnan-Guizhou, Qinghai-Tibet Plateau and Xiangxi Plateau in eastern Guizhou.

4. Single cropping rice planting areas in North China are located in the north of Huaihe River in Qinling Mountains, south of the Great Wall and east of Guanzhong Plain, including parts of Beijing, Tianjin, Hebei, Shandong, Shanxi, Jiangsu and Anhui.

5. The northeast early-maturing single-cropping rice planting area is located in the north of Liaodong Peninsula and Great Wall, east of Daxing 'anling and northeast of Inner Mongolia.

6. Single-cropping rice planting areas in northwest arid areas are located in the west of Daxing 'anling and the Great Wall, Qilian Mountain and the northern part of Qinghai-Tibet Plateau.

Growing habits:

Rice likes high temperature, high humidity and short sunshine, and has low requirements for soil, but paddy soil is the best. The lowest temperature of seedling germination is 10 ~ 12℃, and the optimum temperature is 28 ~ 32℃. The average daily temperature at tillering stage is above 20℃, and the optimum temperature for ear differentiation is around 30℃. Low temperature prolonged the differentiation of branches and glumes. The optimum heading temperature is 25 ~ 35℃. The optimum flowering temperature is about 30℃, lower than 20℃ or higher than 40℃, and pollination is seriously affected.

The relative humidity is 50 ~ 90%. The key period of fruiting is from panicle differentiation to full filling stage; The population with balanced nutritional status and high photosynthetic efficiency is of great significance to improve seed setting rate and grain weight. A lot of water and mineral nutrients are needed at heading and fruiting stage; At the same time, it is necessary to enhance the root activity and prolong the functional period of stems and leaves. It takes about 500 ~ 800 kg of water to form 1 kg of rice.

Question 8: What subsidies can Changsha County enjoy for planting double-cropping rice? 1: planting subsidy, 2: seedling subsidy, 3: agricultural machinery subsidy, 4: grain sales subsidy, 5: agricultural machinery purchase and renewal subsidy, 6: low protection price subsidy, 7: double cropping rice planting subsidy. Basically 20 16 is the national financial subsidy policy!

Question 9: When was the rice harvested in Tongliang, Chongqing? It is a single-season rice in northern China. One-season rice must be sown before Tomb-Sweeping Day and transplanted in late April and early May (Grain Rain can also be transplanted if conditions permit). Northeast China is an early-maturing single-season rice. Sowing time is around April. The growth period of double-cropping rice in the north is one season 104 days, and the second season is 87 days. Generally, they are early-maturing varieties. Avoid winter. Planting double-cropping rice in the north needs to cultivate extra-early-maturing varieties. In the first season, seedlings are raised from the middle of April in the solar calendar, and can be harvested in early August, about 104 days. In the second season, rice seedlings are usually planted while harvesting. Harvest before freezing.

Take the plain in the middle and lower reaches of the Yangtze River in South China as an example. Early rice is sown in mid-April, transplanted in early May, harvested in late July, and then transplanted in late rice (called double cropping). Generally, it must be finished before beginning of autumn, and the late rice will be harvested in late June. 1 1.

Question 10: Do you know any solar terms related to autumn? Beginning of autumn, early summer heat, white dew, autumnal equinox, cold dew and early frost.

Detailed supplement

Autumn refers to the period from beginning of autumn to beginning of winter. During this period, there are six important solar terms: beginning of autumn, summer, white dew, vernal equinox, cold dew and first frost. The climate in autumn is characterized by high humidity and heat in early autumn; After the Millennium, the rain decreased, the climate was dry, and the days were hot and the nights were cool. After the cold dew, the weather soon turned cold. Autumn is a transitional season from summer to winter. The lunar calendar is from beginning of autumn to beginning of winter from July to September, the solar calendar is from September to165438+1October, and the astronomical cycle is from autumnal equinox to winter solstice. Beginning of autumn: Summer on August 8th: White Dew on August 24th: Autumn Equinox on September 8th: Cold Dew on September 24th: 65438+1the first frost on October 9th: 65438+1the custom in beginning of autumn on October 24th. In summer, people can't eat and feel anorexia. Once in early autumn, although the weather is still very hot and people no longer feel wet and sticky, the idea of making some delicious things begins to sprout to make up for the deficit since summer. What should we eat? The most satisfying thing is stew! Eating stew to make up for the fat lost in summer is called "sticking autumn fertilizer" Summer vacation: Folk customs around solar terms are mostly related to ancestor worship and autumn vacation. Around the summer vacation, there will be folk activities to celebrate the Central Plains, commonly known as "July 30" or "Central Plains Festival". In the old days, there was a ceremony to open the gate of hell from the beginning of July until the gate of hell closed at the end of the month, and Purdue giving activities were held. It is said that Purdue activities started with the opening of the gate of hell, and then lanterns were erected and river lanterns were set off, causing lonely souls and wild ghosts; The main body is to build Pudu altar, build solitary shed, and intervene in robbing orphans. Finally, it ends with closing the gate of hell. Today, it has become the main activity time for ancestor worship. In addition, after summer, autumn is getting stronger, which is a good time for people to go swimming in the suburbs to meet autumn scenery. After the heat, even the clouds in the sky seem to be evacuated and free, unlike the thick clouds in the heat. There has always been a saying among the people that "seeing a clever cloud in July and August" means "going out to welcome autumn". [5] River lanterns are also called "lotus lanterns". Generally put lights or candles on the base, and put them in rivers, lakes and seas during the Mid-Autumn Festival to let them float. River lanterns are for ghosts such as drowning in Purdue water. A passage in Hong Xiao's Biography of Hulan River is the best footnote of this custom: "July 15th is Ghost Festival; You damn fool can't keep alive, and it's hard to wander in hell. They want to support themselves, but they can't find the direction. On this day, the dead fool holds the river lantern and has to support it for a lifetime. " [5] For coastal fishermen, the fishing festival is the harvest season after the summer heat, and it is during the summer heat every year; The annual grand fishing festival will be held in the coastal areas of Zhejiang Province, and it is decided to hold a grand fishing ceremony on the day when fishing is closed in the East China Sea to see the fishermen off to sea. The 9th China Fishing Festival was held in Xiangshan County, Zhejiang Province on September 6th, 2006. Because; At this time, the water temperature in the sea area is still high, and the fish will still stay around the sea area, and the fish, shrimp and shellfish are mature. Therefore, from this time on, people can often enjoy all kinds of seafood. [5] The custom of splashing water in Japan, within one month from the hot summer to the hot summer, there is a custom of organizing splashing water to cool down all over Japan. Bailu: When it comes to Bailu solar terms, autumn is getting stronger. In the old days, Nanjing Bailu Tea attached great importance to the "coming" and "going" of solar terms, and gradually formed the solar terms custom with local characteristics in Nanjing. Speaking of Bailuyuan, the old Nanjing who loves tea has a special liking for "Bailuyuan Tea". At this time, the tea tree is in the excellent growth period after the summer heat. Bailu tea is neither as fresh and tender as spring tea, nor as dry and bitter as summer tea, but it has a unique sweet and mellow taste, which is especially loved by old tea customers. Moreover, the spring tea stored at home has basically been "consumed", and at this time, Bailu tea is being picked up, so before and after Bailu, a tea customer asked someone to buy some Bailu tea. Yellow Rice Wine Bailu Yellow Rice Wine Ning, Sandu and Liaojiang have always had wine-making customs. Every year on the Millennium Festival, every family will make wine and drink "local wine" when receiving guests. Its wine temperature is spicy and slightly sweet, so it is called "Bailu rice wine". The best of Bailu rice wine is "Chengjiu", which is named after being brewed with Chengjiang water. Cheng wine, an ancient tribute wine, enjoys a high reputation. "Notes on Water Classics" records: "There is a backwater in Chen County, which flows to the northwest of Dongshan in the county, flows to Lei, and turns south. There is a pub in the county brewing at the foot of the mountain, which is called' Chengjiu' and Fengtong." Lu wine is passed down from generation to generation. Jin Shu's Wudi Collection: "Commend and praise in the ancestral temple", which shows that it has been as long as Lu. "Nine Domains" also said: "Chengshui is in Xingning County, Chenzhou today, which originated from Cheng Xianglai. This water is used to make wine, hence the name' into wine', which is different from wine. " Cheng Xiang is three years old now ... >>