How to weed and fertilize direct seeding rice in wheat field?

Direct seeding rice has the growth characteristics of low tillering node, early tillering, developed root system, shallow root layer, early appearance and rapid decline in the peak tillering period, low panicle rate, large number of spikes and small number of grains per spike, etc., so it is necessary to increase the panicle rate and increase the number of grains per panicle to obtain higher yield. In cultivation, it is necessary to master the fertilization technology, through the adjustment of fertilizer and water, promote the deep rooting of the root system, consolidate the tillering, improve the ear formation rate, and increase the number of grains per panicle, so as to obtain high yield.

Direct seeding cultivation and fertilization, to apply good basal fertilizer, tiller fertilizer and ear fertilizer: first of all, apply enough basal fertilizer, and nitrogen, phosphorus, potassium fertilizer combined application, zinc deficiency paddy field to add zinc fertilizer: basal fertilizer to organic fertilizer, if organic fertilizer is insufficient, can also be chemical nitrogen fertilizer.

In the basal fertilizer, nitrogen fertilizer accounts for 1 2 of the total nitrogen, phosphate fertilizer is used as base fertilizer, and potassium fertilizer accounts for 70% of the total potassium consumption. Generally, about 15 tons of organic fertilizer are applied per hectare, 375 450 kg of ammonium bicarbonate or 150 kg of urea, 375 450 kg of superphosphate, and 90 105 kg of potassium chloride. Zinc-deficient fields should be applied once every 1 2 years, and 30 kg of zinc sulfate should be applied each time.

All nitrogen, phosphorus, potassium and zinc fertilizers should be mixed with a small amount of organic fertilizer and then applied, and the whole layer of fertilization should be implemented, and the land should be turned over with the application and tillage. Top dressing should master the principle of "early tillering and clever ear fertilizer". Tillering fertilizer is generally applied in two times, the first application of tillering fertilizer, and 60 75 kg of urea per hectare at about the three-leaf stage.

The second application of tillering fertilizer, 7 to 10 days after the first top dressing, applied 75 kg of urea per hectare. Early application of tillering fertilizer promotes early tillering and gives full play to the advantages of low tillering. Apply tillering fertilizer to ensure that early tillering does not cause fattening and death and smoothly becomes an ear, and does not reduce the panicle rate due to too many ineffective tillerers.

Spike fertilizer should be applied rationally depending on the sky, soil and seedlings. For the fields with low soil fertility and insufficient growth in the early stage, about 75 kg of urea per hectare can be applied 25 days before heading to promote the differentiation of spikelets and increase the number of spikelets. And with the application of 45 60 kg of potassium chloride, it also plays a role in strengthening the stalks.

Every 7 10 days, about 75 kg of urea per hectare is applied as flower-preserving fertilizer, which can increase the number and weight of solid grains. For the fields with high soil fertility and vigorous growth in the early stage, no flower-promoting fertilizer should be applied, but flower-preserving fertilizer should be reapplied to achieve the purpose of preserving flowers and increasing grains. For the sake of safety, generally do not apply flower fertilizer, and should be appropriately delayed for a few days to promote flower fertilizer, and can not be applied about 30 days before the ear.

Grain fertilizer has the effect of raising roots and protecting leaves, improving seed setting rate and grain weight, but if it is not applied properly, it will cause greedy green and late maturity. It is safer to apply early and middle rice with higher temperature at heading and filling stage, 45 60 kg of urea can be applied per hectare, and for late rice with a faster temperature drop during heading and filling period, nitrogen fertilizer should not be topdressed, and potassium dihydrogen phosphate can be applied outside the root to improve grain weight and seed setting rate, and 3 kg of potassium dihydrogen phosphate can be sprayed per hectare.

Generally Honda fertilized ammonium water copy

The growth process of rice is divided into three stages: before, during and after the rice growth stage, the early stage refers to the vegetative growth stage of rice from transplanting to the end of sinning, that is, the vegetative growth stage of rice. The middle stage refers to the reproductive growth stage (pollen formation period) when rice growth has entered the stage of reproductive growth, and the goal is to strengthen the stalk and attack the large spike, but the fertilization should not be too much; The later stage refers to the period when rice enters the heading to maturity, at this time, it is mainly to attack more grains and full grains, not only to keep not to lose fertilizer, but also not to be greedy for green and late maturity.

It is determined by its growth. The fertilization time of direct seeding rice is generally three periods before, during and after, and the amount of fertilization is 10-15 kg mu. It is reported that the fertilization time of direct seeding rice after removing Huailiang grass: before transplanting, about 10 days after transplanting, and heading period.

Fertilization technology: Reasonable fertilization according to the specific growth of rice and soil fertility, pay attention to the amount of fertilizer, 8kg compound fertilizer or 6kg urea per mu. When fertilizing, choose a sunny day, no enlightenment and hidden wind in the morning.

The final fertilization of direct seeding rice is not to use the month as the standard, but according to the growth period of rice, the general top dressing of rice in the later stage can be divided into jointing booting fertilizer, ear fertilizer, grain fertilizer, can be specifically based on the growth of rice, the focus is on what fertilizer to apply.

If you can't determine whether you can eat by yourself, you can ask the local farming and agricultural technicians to give guidance. Rice is one of the most important food crops in the world today, with more than half of the world's population relying on rice as their main food**.

After 15-20 days of sowing, you can generally start to control barnyard grass, goldenrod, horsetail, sedge, ducktongue grass, so under normal circumstances, it is a better time to apply herbicides after sowing about 20 days.

1. When to do weeding in the rice direct field.

1. Under normal circumstances, when the rice enters the 2-leaf and 1-heart stage, herbicides can be used in the direct seeding field, and the weeds in the field are basically around the 2-leaf stage, which is a good time to control weeds, and the medication time can generally last until the 4-5 leaf stage of rice.

2. According to the sowing time, generally after half a month of sowing, you can start to control weeds such as barnyard grass, Qianjinzi, Ma Tang, etc., and you can start to control weeds such as sedges and ducktongue grass after sowing more than 20 days. Therefore, under normal circumstances, it is a good time to apply herbicides after about 20 days of sowing.

3. The time of weeding in the paddy field can not be too early or too late, if the control time is too early, although the weeds unearthed at this time have little resistance and can be well controlled, there are still some weeds that have not been unearthed, and new grasses will grow after a period of time, resulting in the effect of herbicides is also average; If the control time is too late, the resistance of the weed will be enhanced, and the effect of using the same dose at this time is not as good as that of the drug at the 2-leaf stage, and if the dosage is increased, the cost will also increase. In addition, the late use of herbicides is also easy to cause pesticide damage, because the liquid medicine is easy to enter the rice plant, increasing the probability of pesticide damage.

Direct seeding rice should be fertilized after the herbicide, because the weeds should attract nutrients in the field, before the herbicide should be closed in all the rice fields in the water outlet and water inlet, and the rice field should be filled with water, requiring the rice leaves to be free of dew on sunny days to use the medicine, and the water in the rice field after using the herbicide let him dry naturally, so that all the weeds are killed. When fertilizing, it is also closed that the inlet and outlet of the rock are fast mu, and then fertilized.

First of all, it is necessary to apply sufficient basal fertilizer, mainly organic fertilizer, nitrogen, phosphorus and potassium fertilizer, generally about 15 tons of organic fertilizer per hectare. Then it is necessary to top dressing in a timely manner, in which tillering fertilizer is generally applied in two times, the first application of tillering fertilizer, the second application of tillering fertilizer, and 7-10 days after the first topdressing. Finally, according to the rice growth, weather and other conditions, appropriate fertilization or topdressing outside the roots can be done.