Problems Needing Attention in Rice No-Tillage Cultivation
No-till is one of the complete sets of technologies used in conservation agriculture. Its purpose is to improve and sustain agricultural production by protecting and improving soil, moisture, and natural resources. This technology has the advantages of saving time, improving labor productivity, reducing water and soil loss, protecting soil structure, protecting soil microbial communities, promoting ecological balance and significant ecological benefits.
However, in the process of promoting the use of no-till herbicides in paddy fields, it was found that many people lacked experience, and there were also problems such as incorrect application of pesticides and water management, which resulted in the unsatisfactory results of only partial yellowing of the rice piles after application. Phenomenon, no-tillage effect is not ideal.
First, after field investigation, it was found that there are the following problems:
1, did not carefully read the pesticide use instructions, pesticide application is not standardized.
2, the use of spraying equipment and methods inappropriate. Affect the effect of spraying.
3. The impact of spraying time and weather did not attract attention.
4, did not pay attention to cutting rice height and irrigation time, water depth.
5. Use no-till herbicides in plots that are not suitable for no-tillage.
Second, the preparation before using herbicides
1. Selection and treatment of no-tillage paddy fields: No-tillage paddy fields should be selected for convenient drainage, irrigation, flat land formation, deep plowing layer, and fields with strong water retention and fertilizer retention capabilities. The fields that are not suitable for no-tillage include: sandy soil, leaked land, long-term waterlogged fields, fields that have been abandoned in winter and spring, and heavy-watered peanuts. When the early rice is harvested, it must be cut low and the height should not exceed 15 cm, so that the medicine can be soaked in steamed buns and weeds, accelerate decay, and facilitate throwing. Rice no-tillage method is generally 15 to 20 days before transplanting, irrigation, soaking the field, so that the transplanting layer soil swelling soft mud.
2. Selection of rice varieties: No-tillage in paddy fields generally has no special requirements for varieties, and no-tillage and cast-tobacco should choose rice varieties with strong tillering power, thick stalks, and strong resistance.
3, Pingtian no-tillage rice root is mainly distributed in the shallow soil surface, it should pay attention to stage fertilizer,
Third, herbicide selection and application of treatment.
1. Select suitable herbicides: The herbicides used are preferably safe, fast, efficient, low-toxic, short-lived, and resistant to rain. At present, there are two types of no-till herbicides for paddy fields used in production: one is a glyphosate herbicide with systemic absorption, such as farmers' music 747, farma, and domestic glyphosate. The other is a contact-killing paraquat herbicide, such as Gramoxone, etc., all localities can choose to use according to local conditions.
2. Treatment of no-tillage of early rice: Early rice is applied 10-15 days before the seedlings are thrown in. Before the spraying, the thin layer of water is kept in the field, which is conducive to weed germination and soil softening. When the pesticide is applied, the fields should be arranged. Dry water, try to choose sunny. 150-200 grams per mu, "Farmers Music 747" or 200-250 grams of 20% grams of traces, against the water 25 to 30 kilograms, uniform spraying field weeds, we can not miss the spray.
3. Late rice-free ploughing: Early rice harvesting should be as low as possible. The height of the rice pile should not exceed 15 cm. After the early rice is harvested, drain the field water. If the weather is fine, use 200-300 grams of “Farmer's Music 747†or 250-300 grams of 20% grams of traces of Gram on the same day or the next day, 25 to 30 kilograms of clear water, evenly. Spray each rice pile and weed. If the season allows, it can be sprayed again when the rice pile grows out of the ratooning rice. No matter which type of herbicide is used, the surface must be dry when spraying. The sprayer requires a good degree of atomization. The higher the degree of atomization, the better the effect. Do not spray the drug with a water cartridge. Herbicides must be treated with clear water, and sewage and mud water must not be used, otherwise the efficacy will be reduced. Glyphosate herbicides were used. After spraying, it rained within 4 hours.
4. Post-spraying treatment: After 2 days of spraying, gramnezin is applied back to flooding fields for 5 days. After 4 days of spraying, the farmers plunged into the fields and soaked the weeds and rice piles for 10 days. The grass should be repressed before throwing, in order to facilitate the seedlings to contact the soil and take root. Before throwing, if you find that there are a lot of footprints or indentations in the field, you should flatten the field so that the water is too deep to cause floating of the seedlings, resulting in lack of seedlings.
Fourth, the cultivation of the appropriate age with a small dwarf dragonfly: No-tillage throwing japonica should adopt late sowing and early throwing, age of about 3.5 leaves is generally good not more than 4.5 leaves is better.
V. Water Management: In the early stage, care should be taken to keep shallow muddy water. Avoid too deep water, so as not to cause seedling floating head, resulting in lack of seedlings. The middle and late stages are the same as conventional field tubes. In water management, we should master the principle of shallow irrigation and shallow exposure. After the early rice harvest, the plots of no-tillage and no-tillage cultivation of late rice should be kept soft and not stumbling when harvested to facilitate late-season rice-free cultivation.
Headband Mask,Dust Mask Protective,N95 Certification Mask,Coronavirus Design Disposable Face Mask
KUTA TECHNOLOGY INDUSTRY CO.,LIMITED , https://www.kutasureblue.com