Fertilizer application amount and time of direct seeding rice

Direct seeding rice is a new type of rice cultivation technology, and there are many matters needing attention when it is used, so what is the fertilizer application amount and time of direct seeding rice?

What is direct seeding rice

Direct seeding rice is a kind of cultivation method that sows seeds directly in the field without raising seedlings and transplanting.

The advantages of direct seeding rice are that it can save a lot of labor and alleviate the contradiction of seasonal labor tension, which is of great significance to the realization of lightweight, professional and large-scale rice production, and has broad promotion prospects.

The disadvantage of direct seeding rice is that compared with transplanting rice, direct seeding rice has three problems: difficult whole seedling, heavy grass damage and easy lodging.

2. Fertilizer application amount and time of direct seeding rice

The main results are as follows: 1. The fertilization time of direct seeding rice is generally in the first, middle and later stages, and the amount of fertilizer application is 10-15 kg / mu.

2. Apply more fertilizer in the early stage (from transplanting to termination) to promote the early emergence of rice seedlings.

3. less fertilization in the middle stage (pollen formation stage) to control the production of ineffective tillers.

4. Reasonable topdressing was carried out in the later stage (from heading to maturity) according to the growth of rice.

The ratio of nitrogen, phosphorus and potassium required for direct seeding rice is 1: 0.5. 1.3. A field with a yield of 500 kilograms per mu needs about 10-15 kilograms of nitrogen, 5-7 kilograms of phosphorus pentoxide and 13-18 kilograms of potassium oxide. Fertilizer selection, the selection of high-quality urea, diamine, calcium superphosphate fertilizer, potassium sulfate, potassium chloride or rice special compound fertilizer and so on.

The amount of fertilizer applied in each period is about half of that of nitrogen fertilizer and more than half of phosphorus and potassium fertilizer. The principle of tillering fertilizer is to apply as early as possible, tiller fertilizer is mainly available nitrogen fertilizer, about 1/4 of nitrogen fertilizer, urea with large benefit can meet the requirements. Panicle fertilizer was applied about 15 days before heading, the amount of fertilizer applied was about 1/4 of the total nitrogen fertilizer, and the remaining potassium and phosphorus fertilizer were applied at one time.