Focus on field management in the early and middle stages of early rice
The weather is still quite good this year. The early rice seedlings are gratifying. In order to further realize the high yield of early rice, the middle and late stages should be scientifically managed in the field in order to cultivate and strengthen the seedlings, increase the rate of ear formation and large ear, increase the seed setting rate and the rate of strong seeds. It is the focus.
1. Scientific water management
The management of early rice water is very important, and water management should be done according to the situation.
At present, most of the early rice has entered the booting stage, and the booting stage and heading stage are the key periods for rice to have the most water in the whole life, and there is “he is afraid of fetal droughtâ€, so this period should be shallow water irrigation. However, it should be noted that it is not advisable to have a water layer for a long time, and adopt the practice of “not drinking water, not waterâ€.
In the middle and late period, we insisted on dry and wet, interstitial irrigation, and always kept the soil hard and solid, and the mud did not sink into the feet, enhancing the vitality and resistance of the roots. For the three types of fields with insufficient number of seedlings, the aeration and aeration irrigation measures can be directly adopted to manage the seedling rate of tillering at the end of early rice.
2, rational fertilization
Fertilization in early rice should be determined according to the growth trend, and it should not be blindly fertilized.
Because early rice consumes more nutrients during jointing and young panicle differentiation, this stage depends on the field to see the seedlings and fertilize, ensuring the demand for various nutrients in the middle and late growth. Fertilization in the large-term fertilization of rice, where the fertility of the soil, the base of the fertilizer, the growth of the rice seedlings, and the color of the leaves are dark, should be applied less or not; Usually apply 2.5-3 kg of urea per acre, 2 kg of potassium fertilizer, or 1 kg of urea, pure potassium dihydrogen phosphate 2 and 75 kg of water to spray foliar fertilizer to prevent premature senescence of the seedlings, which is beneficial to increase the number of solid grains. . Topdressing at the heading stage, using topdressing once every 7 days, chasing 1 or 2 times, each time using 150 g of potassium dihydrogen phosphate plus 250 g of urea to 50 kg of water, or other micro-fertilizer The foliar fertilizer is applied to increase the seed setting rate and increase the grain weight.
3. Prevention and control of pests and diseases
At this time, high temperature and many pests and diseases should be especially good for prevention and control.
Adopting the plant protection policy of “integrated prevention and prevention, preventionâ€, rationally selecting pesticides to apply early rice “breaking medicine†to timely control diseases and insect pests such as leaf blast, rice neck lice, leaf curler, stem borer and rice planthopper.
(1) Leaf rickets. When the leaf mites began to appear on the seedlings, the acre was sprayed with 40% Fuji No. 1 + pure potassium dihydrogen phosphate.
(2) Rice neck lice. Spraying once at 3%-5% of the heading, and spraying once again at the time of heading, this is a critical period for controlling rice neck and neck and neck, and the effect is best.
(3) Sheath blight. In the large-term fetal period of the seedlings, the use of Jinggangmycin 3 packets or Ai Miao 3 packets spray.
(4) Prevention and control of pests: leaf-rolling insects, stem borer, insecticide or avermectin, and rice planthoppers using cockroaches, leaf mites, and poisonous monuments.
Summary: Water and fertilizer management in the middle and late stages of early rice is the key. After the high temperature and heavy rain, it is necessary to pay attention to the water and water storage in the paddy field to pay attention to the field inspection. The addition of fertilizer can also ensure the growth of early rice at the right time. Pests and diseases must be prevented in advance, and pests and diseases are most likely to occur during hot and rainy periods.
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