China's three major rice-producing areas are?

1, the northeastern region of rice is mainly concentrated in Jilin's Yanji, Songhua River and Liao River coast;

2, North China is mainly concentrated in Hebei, Shandong, Henan provinces and northern Anhui province on both sides of the river and low-lying areas;

3, Northwest China is mainly in the Fenwei Plain, the Hetao Plain, the Yinchuan Plain, and the Hexi Corridor, Xinjiang, some of the oasis areas.

China's centralized rice production areas mainly in the north, that is, the Qinling-Huaihe River north of the vast area, where mainly belongs to the single-season round-grained rice decentralized area. China's decentralized rice production areas in the north of the sown area accounted for about 5% of the national area with, with a large scattered, small centralized features, mainly distributed in the three water sources more adequate areas.

Extended information:

Growing environment

Rice like high temperature, humidity, short sunshine, the soil requirements are not strict, but the best rice soil. Seedling germination minimum temperature 10 ~ 12 ℃, optimal 28 ~ 32 ℃. Tillering period of more than 20 ℃ daily, spike differentiation temperature of about 30 ℃;

Low temperature so that the branch peduncle and glume differentiation prolonged. Spike temperature 25 ~ 35 ℃. Flowering optimal temperature of about 30 ℃, below 20 ℃ or above 40 ℃, pollination is seriously affected.

Spike differentiation to the grouting period is the key period of fruiting; balanced nutritional status and high light efficiency of the group, to improve the fruiting rate and grain weight is significant. The spike setting period requires a lot of water and mineral nutrients; at the same time, it is necessary to enhance root vigor and prolong the functional period of stems and leaves.

Reference:

Baidu Encyclopedia - Rice