Which kind of rice compound fertilizer is better? the best time for rice topdressing.

After rice matures, it is our common rice, and rice cultivation is also the most common in our country. There are also many skills when planting rice, especially when fertilizing. The choice of fertilizer is very important. Fertilization time also has different periods, so when exactly is it? Let's take a look at it together!

Which rice compound fertilizer is better?

1. Base fertilizer. Before rice transplanting, the basal fertilizer accounts for 40% of the total amount of chemical fertilizer, combined with the last harrowing application. It is suggested to apply 20 kg SACF 20~12~14 or similar compound fertilizer per 667 square meters.

2. Tillering fertilizer. Tillering stage is an important period to increase the number of plants. It should be applied half a month after transplanting or transplanting. It is suggested to apply 20 kg SACF 20~12~14 or similar compound fertilizer per 667 square meters.

3. Panicle fertilizer. Divided into flower promotion fertilizer and flower protection fertilizer. Flower-promoting fertilizer was applied from spike differentiation stage to spikelet differentiation stage. Nitrogen application at this stage could increase spikelet number per panicle. Flower-preserving fertilizer is applied before meiosis of pollen cells, which can prevent spikelet degeneration and increase storage accumulation in stem and sheath. The panicle fertilizer was applied 40~50 days after transplanting, not divided into flower promoting fertilizer and flower maintaining fertilizer. It is suggested to apply 10 kg of compound fertilizer or similar compound fertilizer with 10~6~24 SCF per 667 square meters.

The best time for topdressing rice

1. Generally, the growth process of ammonium fertilizer rice can be divided into three stages: the first stage, the middle stage and the last stage. The early stage refers to the vegetative growth stage of rice from transplanting to the termination of seedling separation. At this time, the goal is to promote effective millet separation and strive for multiple panicles.

2. The middle stage refers to that rice growth has entered the reproductive growth stage (pollen formation stage). At this time, the goal is to attack the big panicle with strong culms, but the fertilizer should not be too much.

3. The late stage refers to the period from heading to maturity of rice. At this time, it is mainly to attack more grains and full grains. It is necessary to keep not to take off fertilizer, but also not to be greedy and late ripening.

Main Fertilization Methods for Rice

1. Front light ~ middle heavy ~ late supplement method: apply proper amount of base fertilizer and tillering fertilizer, apply ear fertilizer reasonably, apply grain fertilizer according to the proportion, achieve early growth and stable growth, not crazy in the early stage, promote flowering in the middle stage, and not premature aging in the later stage. This method not only ensured enough panicles, but also attacked big panicles and grain weight. This method of fertilization is often used for single-cropping late rice and late-maturing middle rice in southern China.

2, before stable ~ attack middle law: this method saves fertilizer, stable yield and high yield. It is mainly to improve effective tillering rate, attack big panicle to improve seed setting rate, increase grain weight and high yield. Characteristics: strong plant, large tiller and small population, early tiller control; strong root, middle attack and large panicle, seed setting rate and panicle weight after middle attack.

3. Pre-promotion ~ central control ~ post-supplement method. This method is similar to the "V" shape fertilization method, heavy application of base fertilizer (accounting for more than 80% of the total) and heavy application of tillering fertilizer, appropriate application of grain fertilizer, to achieve the "early stage can be blasted, the middle stage can be stable, the later stage is healthy and strong" requirements. Northeast rice area, most of the early rice in the south, wheat stubble rice in North China, etc. mostly use this fertilizer method. Its disadvantage is that the early growth is too prosperous, easy to cause the field depression, diseases and insect pests are heavier.

4. Advance fertilization. On the basis of applying sufficient base fertilizer, tiller fertilizer, especially nitrogen fertilizer, should be applied early and heavily to promote tiller early growth and rapid development, so as to ensure tiller increase and multiple ears. Base fertilizer accounts for 70% of total fertilizer (nitrogen fertilizer accounts for 60%~80% of total nitrogen), and the remaining 30% fertilizer is applied after transplanting. This method is suitable for rice growing period rainfall concentration, fertilizer easy to lose, often appear low temperature less light rice area. The base fertilizer is mainly farm manure.

Fertilization amount and proportion of rice

1. Under the condition of 550~600 kg/mu, the nitrogen fertilizer (N) application rate of japonica rice is 14~16 kg/mu, that of indica rice is 10~14 kg/mu, that of phosphorus fertilizer is 3.5~5 kg/mu, and that of potassium fertilizer is 4.5~6 kg/mu. Zinc sulfate 1 kg/mu was applied to zinc-deficient soil, and silicon fertilizer was applied as base fertilizer.

2. Nitrogen fertilizer accounts for 40%~50%, tillering fertilizer accounts for 20%~30%, ear fertilizer accounts for 20%~30%; organic fertilizer and phosphorus fertilizer are all applied as base fertilizer; potassium fertilizer is applied twice as base fertilizer (60%~70%) and ear fertilizer (30%~40%).

3, the application of organic fertilizer or planting green manure turned over the field, the amount of base fertilizer can be appropriately reduced.

There are many choices of compound fertilizer for rice, and different fertilizers are applied in different ways and quantities. There are three periods of rice fertilization, so everyone needs to grasp these periods. There is a detailed introduction in the above, I hope it can be helpful to everyone.