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Several technological steps should be paid attention to in the early stages of throwing rice dumplings in late rice
Paddy rice tray throwing cultivation technology is a provincial, labor-saving, high-yield and stable rice cultivation technology, after many years of promotion and application, with its unique advantages such as saving labor, saving land, improving ergonomics, reducing labor intensity, High yields and significant economic benefits are welcomed by agricultural management cadres at all levels and the majority of farmers. Compared with human intervention, the seedlings have the characteristics of small seedlings, relatively uneven distribution of seedlings, shallow planting, no plant injury, early-onset fast-onset, multiple tillers, and many spikes. For these characteristics, the throwing rice should be prepared as follows: The technical aspects are conducive to exerting its high yield potential. First, Honda's preparations are to ensure that the fields with guaranteed water sources and irrigation can be used as fields. After Honda plowed the rake, he requested to reach a level, rot and keep the mud water out. In addition, basal fat can be used as usual. Second, timely planting and late planting in the age of 7 to 10 days, that is, about 3 leaf age is best for casting. Generally planted at the end of July and early August, if the season between the early and late production is tight and can't be planted at the appropriate age, it can spray 300 kg/kg paclobutrazol solution 3 kg per acre Honda per acre in one leaf and one heart. Prevention of leggy, but the age of throwing can not exceed 6 pieces. According to the experiment, when the leaf age is more than 6 pieces, throwing pods will prolong the growth period, reduce the fertility rate, and reduce the yield. Third, the throwing density The throwing density should be based on rice varieties characteristics, soil fertility levels and fertilizer levels. Usually 1.5 to 2 million families per mu. Premature and weak tiller varieties or low fertility, low fertilization levels of rice fields thrown 20,000 families, moderate maturation, medium tillering ability or medium fertility, medium fertilization level of 1.7 to 1.8 million acres of rice fields, late maturation, childbirth Strong varieties or high fertility, high fertilization levels of rice fields Mu 1.5 to 16,000 families. Fourth, the throwing method is a key part of ensuring production. When throwing a cricket, grab a rake with your hand and forcefully throw a height of 3 to 4 meters in the air, so that the seedlings will be evenly scattered in the field, and the smashed mud will be buried in 1 to 2 centimeters to facilitate the throwing of seedlings. Take root and deliver early. In order to guarantee the uniform distribution of the cast, each field can be thrown twice, that is, 70%-80% of the seedlings should be thrown by Honda first, and then the remaining 20%-30% is thrown into the sparse place to make up. . After throwing, Tanaka left to work and made up the seedlings in the work line to sparse places. 5. Controlling weeds and throwing glutinous rice Due to the uneven distribution of seedlings in the field, there are many spaces that are easily occupied by weeds, especially in the early stage of growth. The throwing of rice is also difficult due to the difficulty of artificially cultivating and weeding, and the growth of weeds is larger than that of transplanted rice. Therefore, the prevention and control of weeds should be emphasized. Chemical control methods for weeds: (1) Apply pesticide before throwing. After the field was mixed, the shallow water layer was kept. The day before the dumpling, the field was sprayed with Nongsi or butachlor (the amount was used as per the instructions), and the next day was thrown. (2) Apply pesticide after throwing. If the herbicide is too late to be applied, it can be combined with the first fertilization 3 to 4 days after throwing. Mix the fine sand with butachlor and mix it with the fertilizer. Or spread it immediately after mixing with 0.2 kg of glutinous rice per mu or 0.13 kg of oxalazine and chemical fertilizer. In order to increase fertilizer efficiency and efficacy, the water inlet should be well cushioned before application, and it should be drained within 5-7 days. VI. Reasonable irrigation and repelling The seedlings will fall flat and lie on the mud surface even after throwing the earthworms. Therefore, the muddy water seedlings should be properly maintained after throwing; the throwing glutinous rice should be planted in the shallow mud, and the tillers should appear as early as possible. With more developed root system, the water management measures such as “seedlings with muddy water, thin water for promoting tillering, and sufficient seedlings for drying in the field†are generally adopted. VII. Rational fertilization and seedling cultivation Due to the shallow planting of N. oleifera, no plant injury occurs. Generally after 3 to 4 days after the first application of fertilizer, apply 4 to 5 kg of urea per acre; 8 to 10 days after throwing a second fertilizer, 7 to 8 kg of urea per acre. After 15 to 16 days after throwing, it will reach enough seedlings, and 15 kg of compound fertilizer per mu will be sufficient for seedlings. The throwing down of the tillering fertilizer should be applied early, and the amount of fertilizer should be appropriately controlled so as to create conditions for the middle-stage fertilization. VIII. Prevention and control of pests and diseases In the early stage of the growth of japonica rice, due to the delicate seedlings and the high temperature, insect pests are generally more serious. Available insecticidal double 38 ~ 50 grams, or 40% dimethoate 200 ~ 250 ml, or 30% acemidosamine EC 150 ~ 250 ml, watered 60 kg spray control.