The life of rice can be divided into two periods according to its growth and development characteristics: vegetative growth period and reproductive growth period. The vegetative growth period is about 90 days, in which the seedling stage is about 35 days, the transplanting period is about 7- 10 days, the tillering period is about 30 days, and the jointing period is about 15 days. The reproductive growth period is about 70 days, in which the booting period is about 15 days, the heading period is about 15 days, the flowering and pollination period is about 15-20 days, and the filling period is about 20 days.

1. The growth period of rice is divided into several periods and several periods.

1. According to the characteristics of growth and development, rice life can be divided into two periods: vegetative growth period and reproductive growth period. Vegetative growth period refers to the period from rice seed germination to seedling jointing, which takes about 90 days. Reproductive growth period refers to the period from booting to maturity, which takes about 70 days.

2. The vegetative growth period can be divided into seedling stage (35 days), transplanting stage (7- 10 days), tillering stage (30 days) and jointing stage (15 days). Seedling stage refers to the period from germination of rice seeds to before transplanting; Transplanting period refers to the period from transplanting to planting; Tillering stage refers to the beginning of transplanting to jointing stage; Jointing stage refers to the period from jointing to booting stage.

3. Reproductive growth period can be divided into booting stage (15 days), heading stage (15 days), flowering and pollination stage (15-20 days) and filling stage (20 days). Booting stage is from the beginning of booting stage to the beginning of heading stage; Heading date refers to the period from the beginning of heading to the beginning of flowering; The flowering and pollination period refers to the period from flowering to grain filling; The grouting period refers to the period from grouting to mature harvest.

2. What is the relationship between rice growth period and cultivation measures?

1. There are three common cultivation methods for rice planting, namely mechanical transplanting of pot seedlings, mechanical transplanting of blanket seedlings and manual transplanting. The mechanical transplanting of pot seedlings is about 2 days earlier than that of blanket seedlings, and the whole growth period is shortened by about 6 days. Generally, the number of artificial transplanting is less, and the whole growth period is advanced.

2. Different cultivation methods have certain effects on rice yield and yield components. The actual yield of mechanical transplanting of pot seedlings is the highest, manual transplanting is in the middle, and mechanical transplanting of blanket seedlings is the lowest. In terms of yield composition, the effective panicle is the main part of artificial transplanting, and the total number of grains per panicle is the main part of blanket transplanting and pot transplanting.

3. In the process of transplanting rice, it is best to use artificial transplanting rice, because the effect of artificial transplanting rice is better, which can ensure the survival rate of seedlings and has more advantages than mechanical transplanting rice. At the same time, it should be noted that seedlings should be sown when they grow to two leaflets, which can improve the survival rate.