A detailed discussion on the new rice-based soilless dry seedling technology

Do you know that the new rice substrate has no soil and dry seedling technology?

Do you understand the new rice substrate soilless dry seedling technology?

We know that the traditional technology of dry rice seedlings has been popularized for more than 20 years. This technique requires the use of mountainous humus soils and high-quality dry field soils as seedling raising soils, which will cause serious damage to the soil and mountainous vegetation in the plough layer of the dry fields. At the same time, due to late spring warming, late soil defrosting, and difficulties in taking soil, it will also be unable to timely Sowing; and the use of the technology of drug harm, affect the normal growth and development of rice seedlings, crop residues of harmful substances, is not conducive to the production of green food.

The new rice-based soilless dry seedling raising technology solves these problems and is a major breakthrough and innovation in rice breeding technology.

I. Introduction and effect of a new rice substrate, dry seedling technology The new rice substrate, dry seedling rice seedlings, is crushed and processed with rice husks, fermented with rice husks using enzyme bacteria, and supplemented with nutrients as a substrate to achieve soilless seedlings. Subject to the constraints of land resources and other factors, it is possible to raise the grasshopper in advance. Fermented rice hull has good air permeability, good seedling quality, and well-developed seedling root systems, more white roots, more roots, and longer root lengths, which can effectively reduce the occurrence of seedbed diseases, return to green fields after transplanting to Daejeon, and early and effective tillering. More than one child.

Second, the new rice matrix dry seedlings technical points 1. Rice husk treatment: The rice husk crushed, the standard crushing the sieve pore size of 2.5 to 3.0 mm is appropriate. After crushing, add 3 to 4 kg of enzyme bacteria to 1000 kg of crushed rice husk; 50 to 100 kg of fresh chicken manure, 15 to 20 kg of rice bran or wheat bran, 15 to 20 kg of urea, and 400 to 500 kg of water. , reach the hand into a group not water, landing spread. Stack it up into trapezoids and cover it with sacks. Can be covered with straw or plastic sheeting to prevent rain, not overly tight, to prevent airtight. Wait until the rice husks turn brown or dark brown for successful fermentation.

2. Substrate preparation: mix well with fermented rice husk 6-7 kg and KBS-type rice new substrate-fermentation nutrient 250 g, and can spread 1 m2 seedbed or 6 mowing discs.

3. Lay out the matrix: Place the well plate, lay 2.5 mm thick matrix, the upper part should be flat, use the plate to compact or use the scorpion to make solid, soak once before sowing to ensure that the water is sufficient before the seedlings.

4. Variety selection: In the selection of varieties, it is the same as the conventional methods of breeding. The varieties with large spikes or large panicles with high quality, high yield, disease resistance and strong tillering ability are selected. , "Wuyoudao 3", "Japonica 10", "Japonica 12" and so on, the choice of species is not limited by the substrate.

5. Seeding and Covering: New substrate seedling sowing time can be 3 to 5 days earlier than conventional breeding. The conventional method of seedling cultivation begins when the local daily average temperature is stable at 5°C, usually before April 15th of each year, and the new seedling sowing time is April 7-8. Pan seedlings are planted with 100-125 grams of seed for each seed. Seeds must be sown and patted with wood to facilitate seedling emergence. The rice hull was covered on top of the seeds and had a thickness of 0.5 cm. After the cover is covered with a micro-spray device, the cover film is covered, and when the seedlings show up, see the green and uncover the film.

6. Seedbed Management 1 Temperature Management: Sealing and soaking until sowing and temperature control, 30 to 32°C.

Emergence to the leaf stage, greenhouse temperature controlled at 25 ~ 28 °C, and began to ventilate seedlings.

Seedlings 1.5 to 2.5 leaf stage, gradually increase the ventilation, the temperature of the shed is controlled at 20 ~ 25 °C, to prevent high temperature burning seedlings and seedlings leggy.

The seedlings ranged from 2.5 to 3.0 leaf, so that the night cover was opened and the temperature of the canopy was controlled at 20°C, gradually adapting to the climatic conditions of the outside world.

2 Moisture management: After sowing, it should be checked once every 2 days before sowing, and there is a phenomenon of dryness (the upper layer of rice husk is easy to dry and the lower layer is not easy to dry). Water is sprayed with micro-spraying equipment.

Seedlings were refilled with water once every two days at 1.5 leaf stage. 1.5 After the initial root elongation at the leaf stage, water can be poured 3 to 5 days. Due to the higher number of waterings, a sun bath should be provided to increase the water temperature.

3 seedbed topdressing: seedlings 1 leaf 1 heart rate per square meter chasing 25 grams of ammonium sulfate, spraying with water spray wash seedlings.

4 Prevention of Blight: Pot seedlings are sprayed with 50% hymexazol 2.0-2.5 g watered 2.5-3.0 kg per square meter per square meter, and then rinsed with fresh water.

5 to prevent leaf miner flies: 2 to 3 days before transplanting, with a large hero 10 grams of water 10 kg spray 100 square meters seedbed, with medicine Shimoda.

7. The first thing to notice is that it should be poured into the bottom water, and it should not be irrigated and easy to dry: it should be better than the soil water retention after the bottom water is poured.

Second, due to the presence of enzymes and aerobic organisms, attention should be paid to observation. Once oxygen deficiency is discovered, the film must be removed.