When will the rice be harvested?

1. Rice harvest in South China is divided into two seasons, summer grain and autumn grain. The former is harvested in June of the lunar calendar, while the latter is harvested in September.

2. Rice was harvested in the north, and it was harvested in June+10 in 5438, with only one season.

First, the concept:

Rice refers to the "child" of rice, which is rice.

2. Rice can be divided into rice (in which water always refers to fresh water), upland rice (upland rice) and sea rice according to its living environment.

Second, the ecological characteristics:

1. Rice belongs to fibrous root system, with developed adventitious roots and panicles, and is self-pollinated. Annual cultivated grain.

2. The stem is erect, with a height of 30 ~ 100 cm. Leaves alternate two rows, linear-lanceolate, ligule membranous, 2-lobed. Panicle is loose;

3. Spikelets are oblong, squashed on both sides, with 3 florets, glume degenerated, leaving only traces, and the top florets are bisexual, lemma boat-shaped and awned; Stamens 6; Degenerate 2 flowers leave only the lemma under bisexual flowers, which is often mistaken for glume. Dianthus native to tropical Asia. It is one of the main food crops in the world.

4. China's rice planting area accounts for 1/4 of the national grain crops, but the output accounts for more than half. The cultivation history has been 6000 ~ 7000 years. As an important food crop; In addition to eating caryopsis, it can also be used to make starch, wine and vinegar. Rice bran can be used to make sugar, extract oil and extract furfural, and is used in industry and medicine. Rice straw is a good feed, paper-making raw material and textile material, and rice buds and roots can be used as medicine.

Third, the distribution area:

1. Rice is one of the important food crops for human beings, with a long history of planting and consumption.

At present, half of the world's population eats rice, mainly in Asia, southern Europe, tropical America and parts of Africa.

The total output of rice ranks third in the world, lower than corn and wheat, but it can support more people's lives, so the United Nations designated 2004 as the "International Year of Rice".