Strengthen the field management About 3 days after rice transplanting, the leaves of the seedlings grow up, and the tip of the seedlings spit water. In the sunny days, the leaves of the young seedlings are unfolded and new roots are added, which is the turning green. The main management at this stage is to check the seedlings and make up for the seedlings to ensure that they have the proper density and basic number of seedlings. The second is to see seedling irrigation, rice returning to the green period is particularly sensitive to moisture, because the seedlings transplanted when the root system is injured, the absorption capacity is reduced, it is easy to lose the water balance. If there is a lack of water after transplanting, the seedlings will slowly return to green or delay the emergence of dead seedlings; too much water will affect the normal return to green. The third is the timely application of nitrogen fertilizer-based return green fertilizer, generally 2 to 3 days after rice transplanting, timely fertilizer, can promote early growth of new leaves, early tiller, seedlings robust. When dressing, it is advisable to keep the shallow layer about 3 cm.
In a timely manner, chemical weeding and weeds in paddy fields generally grow faster and their ability to absorb water and nutrients is also stronger, and their harmfulness is mainly manifested in competition. During the growth process, weeds compete with rice for water, fertilizer, light and nutrient space, affecting the normal growth of rice. Field weeds are mainly grasses and grasses of grasses and weeds; sedges, sedges, cattle blankets, etc.; broadleaf weeds, dwarf arrowheads, bamboo vegetables, Siye Ping, and Mo Serve and so on.
At present, there are many kinds of chemical herbicides on the market. According to the observations of many years and the user's return information, the following herbicide varieties and methods are provided for use by the majority of farmers.
1. Herbicides to be mixed with soil or fertilizer
125% refined grass star, 25 to 35 grams per mu, 5 to 9 days after transplanting; 220% loquat, 30 to 45 grams per mu, 5 to 12 days after transplanting; 315.6% Kunming No. 2, 50 grams per mu, 3 to 7 days after transplanting; 420% Kunchi, 150 grams per mu, 10 to 25 days after transplanting; 550% paracetamol, 80 to 100 grams per mu, 10 days after transplanting (After seedlings return to green); 650% butachlor, 150 to 200 grams per acre, 5 to 7 days after transplanting; 710% DuPont new effective, 10 grams per acre, 7 to 10 days after transplanting. The herbicide may be any one of the following: 20-25 kg per mu of mixed soil or chemical fertilizer is applied evenly after the morning rice leaf dew or after 4 pm.
2. Herbicides that can be directly applied
19% lazy Han, 45 to 60 grams per mu, 4 to 7 days after transplanting; 230% Yunnan Tianmao, 40 to 60 grams per mu, 3 to 5 days after transplanting, after the morning rice leaves dew dry or in the afternoon After four o'clock append.
3. Herbicides that can be sprayed after emergence of weeds
1 Kill 50% of scorpion herbicides to kill corpse, 25 grams of scorpion in 2 leaves stage, and add 5 grams of yam to increase the dose of 1 leaf in sorghum 2 leaves; spray evenly in 30 kg of water before use. Water; Irrigate 3 to 5 cm 2 days after medicine and keep for 5 to 6 days. 2 Herbicides designed to kill broad-leaved weeds, 10% DuPont New Effective, 2 to 3 leaf weeds, 10 grams per acre, 25 kg evenly sprayed; such as special eye-catching dish (dental grass), grasped Basically, teeth grasses are flush, and when the leaves turn from red to green, the fields are drained, and 10 to 15 grams per mu, evenly sprayed with 25 kilograms of water, the water is poured back to the field on the 2nd day after medicine, and 3 to 4 cm water layer is maintained, keeping 5 ~ 7 days.
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