What are the six stages of the life cycle of rice?

The life cycle of rice can be divided into two stages: vegetative growth and reproductive growth. The vegetative growth stage is before the rice panicle begins to differentiate, and the reproductive growth stage is after the rice panicle begins to differentiate. In production, the vegetative growth stage is often divided into seedling stage, rejuvenation stage and tillering stage. The reproductive growth stage is divided into young spike differentiation stage and seed setting stage, and can also be subdivided into early spike differentiation stage, booting stage, first ear stage, full heading stage, grain filling and fruiting stage and maturity stage.

The growth stage of rice can be divided into early spike differentiation stage, booting stage, first panicle stage, full heading stage, grain filling and fruiting stage and maturity stage.

We are accustomed to refer to the germination of rice seeds to the formation of new seeds, which is called the life of rice. According to morphological and physiological characteristics, the life cycle of rice can be divided into two periods (or stages) of vegetative growth and reproductive growth. The vegetative growth period refers to the period of growth from seed germination to the beginning of rice panicle differentiation. The reproductive growth period refers to the growth period from the beginning of the differentiation of rice ears to the maturity and harvest.

The vegetative growth period can be divided into seedling field vegetative growth period and field vegetative growth period (except for direct seeding rice). Among them, the vegetative growth period of seedling field can be divided into three periods, namely, the bud stage from seed germination to incomplete leaf extension, the seedling stage from incomplete leaf extension to the third leaf full emergence, and the seedling stage from the fourth leaf to transplanting.

The vegetative growth period of field can be divided into rejuvenation stage and tillering stage. The period from transplanting to the time when the leaves turn green and the new leaves begin to return to normal growth is called the regreening stage. The tillering period can be divided into effective tillering period and ineffective tillering period

The effective tillering period refers to the period from the beginning of tillering to the total number of stems in the whole field reaching the same as the planned number of panicles. The ineffective tillering period refers to the period from the time when the total number of stems in the whole field is equal to the number of ears to be harvested to the time when tillering stops.

The reproductive growth period can be divided into the young spike development stage and the flowering and fruiting stage. The spike development stage includes the spikelet formation stage from the beginning of the spikelet differentiation to the first half of the parietal lobe and the booting stage from the parietal half to the heading. The flowering and fruiting period can be divided into the flowering period from the beginning of the parietal leaf sheath to the completion of flowering and pollination, and the fruiting and ripening period from the completion of pollination to maturity and harvest.

What are the six stages of rice life, let's start to describe in detail. Raising flowers. Ripe harvest. Step by step, the rice was taken home.

Rice is the most important crop in China, the history of planting in China is very long, different types of rice have different growth periods, so what are the six links in the life of rice? Let's find out.

1.Seedling stage.

The seedling stage is the seedling stage when 50% of the rice field sprouts and the seedling stage is the seedling stage. The period from the very beginning of transplanting to transplanting and gradual growth is the transplanting period, and more than 3 days after rice transplanting, the seedlings are hearted and leafy, and new roots are rooted, which is the rejuvenation of rice.

2.Tillering period.

After the rice returns to green, the temperature slowly increases, the rice gradually tillers, generally the rice gradually tillering as the beginning of rice tillering, the rice tillering festival basically terminates as the tillering stop period, the rice tillering period can be divided into reasonable tillering period and failed tillering period.

3.Jointing phase.

It refers to the period before the jointing period of rice, and during the jointing period of rice, it is necessary to do a good job in cultivation technology, which can effectively increase the number of panicles of rice and increase the rate of heavy panicles.

4.Booting period.

When the young panicle of rice lifts the petiole to show the fluffy spikelet, the rice needs to enter the jointing stage, and the plant petiole can be seen to be a nodal protrusion. For some varieties that are prone to falling seedlings, mequat can be sprayed at this stage.

Manipulating the relative height of the joint. And it is better to use ear fertilizer in advance.

5.Pollination period of flowers.

It refers to the beginning of flowering to the gradual grouting of grains. Rice is particularly sensitive to drugs during the heading and flowering period, especially in the morning when rice is in full bloom and more intensive. Therefore, it is best not to spray chemical fertilizers.

6.Grout period.

Rice grain filling period refers to a period of time from the completion of flowering to the completion of the glume shell closure to the perfection of the grains, and the exact time is different, such as early rice in the south, the grout period is more than 10-15 days, and indica rice in the north.

The filling period has exceeded 40 days.

The seedling stage is the seedling stage when 50% of the rice field sprouts and the seedling stage is the seedling stage. The period from the very beginning of transplanting to transplanting and gradual growth is the transplanting period, and more than 3 days after rice transplanting, the seedlings are hearted and leafy, and new roots are rooted, which is the rejuvenation of rice.

The life cycle of rice is divided into six stages, namely sowing period, seedling emergence stage, tillage period, growth period, maturity period and harvest period, respectively, we should pay attention to the frequency of watering and environment.

The life cycle of rice is divided into six stages, which are the early stage of differentiation, booting stage, first ear stage, full heading stage, grain filling and fruiting stage and maturity stage. When watering, be careful not to irrigate too much.

That is definitely the stage when the seed sprouts, grows leaves, grows fruits, and withers. It should be noted that it must be watered more.

China is one of the earliest countries in the world to cultivate rice, and the progress of wild rice domestication and cultivation technology has a very long history. The rice cultivated in China belongs to Asian cultivated rice, and its ancestors are perennial common wild rice.

During the Song Dynasty, rice cultivation and cultivation improved, and the Champa rice introduced from Vietnam was gradually promoted.

During the Ming and Qing dynasties, double-cropping rice and triple-cropping rice could already be planted in the south. In the long-term cultivation, many excellent varieties have been cultivated, and unique ancient rice farming technology in China has been formed.

China has a long history of rice cultivation. According to archaeological excavation reports, dozens of Neolithic sites in China have the remains of carbonized rice or stems and leaves. The Neolithic site of Hemudu in Yuyao, Zhejiang Province and the Neolithic site of Luojiajiao in Tongxiang, the remains of carbonized rice unearthed have a history of about 7,000 years.

The historical relics of rice cultivation by the ancients are most concentrated in the southern part of Jiangsu and the northern part of Zhejiang in the Taihu Lake area, followed by Hubei Province in the middle reaches of the Yangtze River, and the rest are scattered in Jiangxi, Fujian, Anhui, Guangdong, Yunnan, Taiwan and other provinces.

Late Neolithic remains have also been found in Henan and Shandong in the Yellow River Basin. The carbonized rice unearthed has the difference between indica rice and japonica rice, indicating that the differentiation of the two subspecies of indica and japonica has appeared as early as the primitive agricultural period.

During the Warring States period, due to the use of iron farming tools and ploughs, intensive cultivation began to be carried out. At the same time, large-scale water conservancy projects were built for the development of rice, such as the Zhangshui Canal in Hebei, Dujiangyan in Sichuan, and the Zhengguo Canal in Shaanxi.

China's rice originates in the south, and rice has always been the staple food of the people in the Yangtze River basin and its southern areas. After the Wei, Jin, Southern and Northern Dynasties, the economic center of gravity shifted to the south, and a large number of people in the north moved south, which promoted the rapid development of rice production in the south. After the Tang and Song dynasties, some rice areas in the south further developed into the country's rice base.

Rice: 7000 years ago in the excavation of the Hemudu site, there are a large number of rice, rice grains, rice roots, rice stalk accumulations Shangshan cultural site (located in Zhejiang Puyang River, a tributary of the upper reaches of the Qiantang River) also found rice remains, its age is about 11400-8600 years ago, Shangshan culture is widely distributed in Jinhua, Quzhou area. In addition, rice grains (23,000-10,000 years ago) have also been found in the caves of the Wannian Xianren Cave site in Jiangxi, which may have been collected.

Rice is a cereal crop of the genus Oryza, and the representative species is rice (scientific name: oryza sativa l.).）。Rice is native to China and India, and was cultivated by the ancestors of the Yangtze River valley 7,000 years ago.

Rice is divided into indica and japonica rice, early rice and middle and late rice, glutinous rice and non-glutinous rice according to rice type. According to the way of seed retention, it is divided into conventional rice and hybrid rice. There are other classifications, which are divided into paddy rice and floating rice according to whether they are soilless or not; According to the life cycle, it can be divided into season rice and "lazy rice" (regenerated rice over the years); According to the height, it is divided into ordinary rice and giant rice of about 2 meters; According to salinity tolerance, it is divided into ordinary freshwater rice and "seawater rice" (in fact, it mainly uses fresh water).

The fruit of rice is rice, and the rice is called brown rice after removing the glume husk, and the brown rice can be obtained by grinding off the rice bran layer. Nearly half of the world's population relies on rice as a staple food. In addition to being edible, rice can also be used as industrial raw materials for brewing and sugar making, and rice husks and rice stalks can be used as livestock feed.

The main rice producing areas in China are mainly the Yangtze River Basin, the Pearl River Basin and Northeast China. Rice is a direct cash crop, rice is the staple food of Chinese residents, the current domestic rice planting area is 100 million mu of conventional rice, and the planting area of hybrid rice is 200 million mu.

Chinese scientists have made rare contributions to rice scientific research in the world: Academician Yuan Longping is known as the "father of hybrid rice", Academician Zhu Yingying has made outstanding contributions to the research of hybrid rice, and farmer Hu Daishu invented regenerative rice for more than one year.

The rice growth period is divided into two stages. 1. Vegetative growth stage: The vegetative growth stage of rice is from the germination of rice seeds to the jointing stage of seedlings, which takes about 90 days, and this stage is divided into four periods, namely seedling stage, transplanting stage, tillering stage and jointing stage.

2. Reproductive growth stage: The reproductive growth stage is from booting to maturity, which takes 70 days, and it takes about 15 days from the beginning of breaking heading to the beginning of breaking the shell and flowering.

It takes about 20 days from the start of the filling to the ripening of the harvest. It is also divided into four periods, namely booting stage, heading stage, pollination stage, and grain filling stage.

Seedling stage: The rice seedling stage is about 35 days from seed germination to transplanting and transplanting, and the seedlings continue to grow during this period.

Rice transplanting period: The rice transplanting period is the stage from the beginning of transplanting to the beginning of planting, which generally takes 7-10 days.

Tillering period: The tillering period is the period before the transplanting of seedlings begins to grow and jointing, which takes about 30 days, and the rice seedlings enter the tillering period immediately after turning green. The tillering stage is the key to rice growth, when the rice seedlings become stronger and the number of leaves gradually increases.

Jointing stage: The jointing period is the period from the beginning of jointing to the time before booting, which takes about 15 days, and the rice seedlings grow rapidly at this stage and begin to grow taller and taller.

Booting period: The booting period is about 15 days from the beginning of booting to the beginning of heading, and rice ears are born at this time.

Heading period: After the booting period, it begins to enter the heading period, which is from the beginning of the opening heading to the beginning of the shell and flowering, this time period takes about 15 days, which is the key to growth.

Flower pollination period: The flower pollination period is from the beginning of flower flowering to the beginning of grain filling, which takes about 15-20 days.

Grain filling period: The grain filling period is from the beginning of the grain filling to the maturity of the harvest, generally takes about 20 days, at this time the grain is white milky, the starch in it continues to accumulate, and the dry weight and fresh weight in the grain will continue to increase.