1. Promote tillering
The field management throughout June focuses on promoting rice tillering, early to mid-June is the peak of rice tillering, and scientific management to promote effective tillering is the key to high yield.
1. The warming of shallow aquifer promotes early growth and rapid onset. Including fertilization and weeding, the field should not be in deep water. Deep water, the effect of weed control is not good, but also inhibit tillering. The water layer is maintained at 3 to 5 cm, but it cannot be without water, and the water temperature is more important than the temperature to promote tillering. In low temperature weather, the role of water temperature in promoting tillering is more obvious, the sun is hot water, water can store heat, water is not easy to cool, hot water all night, seedlings do not delay long.
2. Reasonable fertilization to promote tillering. Tillers are not distinguished, sometimes not enough fat, but other conditions are insufficient. At the beginning of June this year, the temperature difference is large and rainy days are more low temperature and low temperature, do not apply large head fertilizer, apply less than many times, and the last tiller fertilizer is determined by the number of tillers in the early stage. Tiller fertilizer is 35% pure nitrogen throughout the year. After June 20, if there is insufficient tillering in the field and some of the fields are too yellow, look at the field fertilization. Apply 10% pure nitrogen all year round. Normal effective tillering can be done until the end of June and the beginning of July.
Second, the secondary closure
After the rice seedlings have fully returned to green, they should carry out secondary closed weeding in time to avoid grass shortage, and the agent should use benzothiazidoxamide, propyloxamide, salvia phosphorus and other barnyard grasses to extinguish the barnyard grass, and the plots with more broad-leaved weeds should be combined with pyridopyrifosulfuron and benzylpyrifosulfuron. Use the poisonous soil method to apply, maintain the water layer for 5 to 7 days, the water layer must not flood the rice heart, do not apply the drug when the temperature is particularly low, as far as possible do not slip, so as to avoid drug damage.
Third, apply medicine to prevent insects
It is recommended that insecticides with an ascetic effect, such as imidacloprid, must be selected for the control of leafminer flies; at the same time, pay attention to the control of rice water weevil. In early June, when leafminer fly larvae endanger rice seedlings, adults like to lay eggs at the tip of the leaf on the sagging or flat water surface, and the larvae lurk in the leaf epidermis, bite the leaf flesh, and the leaves rot after contact with water, and the affected field plots are reduced to varying degrees.
Leafminer fly control should be carried to the ground with imidacloprid before planting, and it is best to spray the agent again before irrigation after planting, the main agents are: avy chlorpyrifos, high-efficiency cypermethrin. The water layer should not be too deep, if the leaves are drooping into the water, the water should be drained as soon as the hand touches the knots.
Fourth, the sun field
After June 20, the number of tillers in the field reaches 80% of the expected drainage and drying field, the sunning field can control ineffective tillering, enhance root vitality, accumulate nutrients, provide more nutrient sources for the early stage of differentiation of rice young ears, reduce field humidity, destroy the propagation and propagation conditions of pathogens and insect eggs, enhance disease resistance, improve lodging resistance, dry field for 5-7 days, dry until there are chicken claw cracks in the field is the best, re-sunbathe the plot, achieve white root exposure, leaf color fading, leaf straight immediately, when about 1/3 of the plants in the field have been jointed, The field should be stopped and normal water management should be carried out to ensure the differentiation and growth of young ears.
Fifth, the prevention of tube leaf seedlings
After the rice seedlings were transplanted to Honda, some rice seedlings appeared tubular leaves, and the heart leaves were difficult to arch out, affecting growth and pregnant ears. It will cause rice production to be reduced to varying degrees! Most of the tubular leaf seedlings are caused by the use of hormone products at the seedling stage, and mostly occur on the main stem leaves. There are also those caused by the use of hormonal drugs after planting! There are generally the following situations.
1. When rice 6 to 7 leaves appear cylindrical leaves, most of them are caused by the repeated or excessive use of naphthaleneacetic acid rooting agent in rice seedlings about 3 leaves. Rice is harmed by the drug when it is 3 leaves, which is when the growth point on the 6th leaf formation and the 7th leaf of the rice is differentiated. The third leaf is the excessive use of naphthaleneacetic acid rooting agent, and the 6th to 7th leaves will appear tubular leaves.
2. When rice leaves are 7 to 8, the barrel leaves appear, most of which are caused by the use of "2·4 d" for the bottom medicine.
3. The cylindrical leaves that appear in the 5 to 6 leaf stages of rice may also be the drug damage caused by the 2.4 d herbicide of the bottom medicine, and the amount and water depth are not heartbroken!
4. Tubular leaf seedlings may also appear on rice seedbeds or before the use of dichloroquinoline acid on the 2.5 leaf.
5. If there are more tube-shaped leaves of rice seedlings in the corner of the pond at the edge of the paddy field, it may be that the bottom medicine drifts to the corner too much in 2·4 days, causing the drug damage.
Workaround:
1. Amino acid series foliar fertilizer can be sprayed with brassicalide to promote growth and rapid tillering.
2. If there is an occasional cylindrical leaf, you can ignore it, and then there will be no tillers, which will not cause serious yield reduction.
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