How many stages are there in the rice growth period, and what are the approximate number of days req

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.

1. Milk maturity stage: the grain is white milky and starch begins to accumulate. 2. Wax ripening period:

The chaff of the rice grains turns slightly yellow, and it generally takes about 7-9 days. 3. Maturity period: the chaff turns yellow, and the moisture in the rice grains decreases.

4. Withering and ripening period: the yellow color on the surface of the chaff gradually fades, and the branches begin to dry up, which affects the quality of rice.

1. Milk maturity stage

3-5 days after flowering, the rice began to fill the grain, the grain was white milk slurry, the starch continued to accumulate, the dry weight and fresh weight continued to increase, in the middle of rice milk maturity, the fresh weight reached the maximum, the rice grain gradually hardened and whitened, and the back was still green.

2. Wax ripening period:

When the rice wax is ripe, the inside of the grain is relatively thick and sticky, no emulsion appears, squeeze the middle of the ear by hand, the grain has a hard feeling, at this time the fresh weight begins to decline, the rice grain chaff turns slightly yellow, and the rice wax maturity period will go through 7-9 days.

3. Maturity period

After the rice enters the maturity period, the chaff turns yellow, the color is golden yellow, the moisture in the rice grains decreases, the dry weight reaches a fixed value, the grains gradually become hard, and the rice will not be broken when kneaded and twisted by hand, and the rice maturity period is the harvest period.

4. Dry and ripe period

When the rice enters the dry and ripe period, the yellow color of the surface of the chaff gradually fades, the branches begin to dry up, the top branches are very easy to break, and the rice grains of the rice have traces of crossing, affecting the rice quality, and the rice is ripe at this time.

Rice is divided into seedling stage, jointing stage, heading and flowering stage, booting stage, and maturity stage, and the growth time of each stage is different.

Under normal circumstances, there are more than 120 days of early and late rice, and more than 140 days of medium rice.

Southern region. It is about 110 days for early rice and about 120 days for late rice.

Seedling stage: seedling stage. Seedling tillering.

Effective tillering period and invalid tillering period in the rejuvenation stage. Spikelet development stage: differentiation stage, formation stage, completion stage. Flowering and fruiting period: milk maturity period, wax maturity period, and completion stage.

It takes about 30 days for each rice to grow.

Generally, the growth period of rice is about 120 days.

The time of different growth periods of rice is different.

It takes about 120 days for each rice to grow.

The growth period of rice is related to the variety, climate, temperature, etc., and the growth period varies slightly under different environmental conditions.

In Jilin, it is generally machine-inserted in mid-May and harvested in mid-October, generally about 150 days.

The five growth stages of rice are seedling stage, tillering stage, panicle differentiation stage, heading and flowering stage, and grain filling and maturity stage. There are many varieties of rice, the growth period is generally about 130-140 days, and it can be planted three times a year in warm climates, in the northern region.

Plant one more phase.

Rice likes high temperature, humidity and short daylight, and the requirements for soil are not strict, but paddy soil is the best. The minimum temperature of seedling germination is 10 12, and the optimal temperature is 28 32. The average daily temperature of tillering stage is more than 20, and the appropriate temperature of panicle differentiation is about 30. Low temperature prolongs the differentiation of branches and spikelets.

Heading temperature 25 35. The optimal temperature for flowering is about 30, below 20 or above 40, and pollination is seriously affected.

Relative humidity. 50 90% is appropriate. Spike differentiation to peak grain filling stage is the key period for seed setting. Groups with balanced nutritional status and high light efficiency are of great significance for improving seed setting rate and grain weight.

A large amount of water and mineral nutrients are required at the heading and fruiting stage; At the same time, it is necessary to enhance root vitality and prolong the functional period of stems and leaves. 1 kg of rice per formation.

Approximately 500,800 kg of water is required.

The number of days from the emergence of the seedling (the first complete leaf is exposed by 2 cm) to maturity is the growth period of rice. In rice, the seed germination to the rice is usually generated, and the new seed is produced as a growth cycle of rice, that is, the growth period. The growth period can be divided into seedling stage, rejuvenation stage, tillering stage, long spike stage (panicle differentiation stage), and fruiting stage.

Generally, the seedling period has been completed in the seedling field, and the period of slow seedling survival after transplanting is called the regreening period, and the tillering begins after returning to green (some have begun tillering in the seedling field), and the panicle differentiation (jointing) begins, before the young panicle differentiation, it is the vegetative growth period of long roots, stems and leaves, and the reproductive growth period of the panicle differentiation to maturity is the long spike, flowers, grains, etc.

The reproductive growth period of rice includes jointing and booting stage, heading and flowering stage and grain filling and seed setting stage. The fertility characteristics of rice reproductive growth period are long stems and long spikes, flowering, fruiting, formation and enrichment of grains, which is the main stage of high yield, especially attention should be paid to the coordination of fertilizer, water and air in cultivation, prolong the functional period of roots and leaves, improve the conversion rate of material accumulation, and achieve sufficient number of spikes, large spike type, high 1000-grain weight and seed setting rate.

The jointing and booting stage refers to the beginning of the differentiation of young panicles to the growth of panicles, which generally takes about one month; The heading and flowering period refers to the period from the top stem sheath to the flowering of the full panicle, which is generally 5-7 days; The grain filling and fruiting stage refers to the period from the flowering of rice ears to the maturity of grains, which can be divided into milk maturity stage, wax maturity stage and full maturity stage.

Rice is a kind of herbaceous rice, and it is also the most important and longest-standing one of the rice genus as a grain. Native to China, rice has been cultivated in the Yangtze River basin of China 7,000 years ago.

Generalized rice is different from upland rice; Narrow rice refers to light rice, which is different from seawater rice.

According to the type of rice, rice can be divided into indica and japonica rice, early rice and middle and late rice, glutinous rice and non-glutinous rice. There are other classifications, rice is generally cultivated in paddy fields, and soilless cultivation is water rice. Rice is generally not one meter tall, and about 2 meters is newly cultivated giant rice.

Chinese scientist Yuan Longping has made great contributions to the research of hybrid rice and is known as the "father of hybrid rice". 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 feeds on rice.

In addition to being edible, rice can also be used as industrial raw materials for brewing and sugar, and rice husks and rice stalks can be used as feed. The main rice producing areas in China are mainly the Northeast region, the Yangtze River basin and the Pearl River basin. It is a direct cash crop.

It is also the staple food of one-third of the world's human race. It is also the main organic food of the people of the north. In September 2017, Yuan Longping announced a new achievement in the elimination of cadmium, a heavy metal, from rice.

<> "There are several stages in the rice growth period.

1. Vegetative growth stage.

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

Rice transplanting period: The rice transplanting period is the stage from the beginning of transplanting to the beginning of planting, and it 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.

Second, the stage of reproductive growth.

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, and the heading period is from the beginning of the breaking heading to the beginning of the opening of the shell and the 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.