Frequent intrusion of cold air, more common low-temperature dry wind weather, has a greater impact on late rice flowering. In particular, the field of late sowing and late heading, the growth period is postponed, resulting in late heading. According to years of practical experience, the following five remedial measures should be taken for late rice heading:
First, increase the application of potassium fertilizer, promote early heading
Seedlings with late heading or heading should be added 1 or 2 times of potash, 5 to 6 kg of potassium chloride, or 30 kg of black and white ash. (Lime powder, grass ash mixed evenly before morning dew is applied) In order to improve the ability to resist disease, wind and cold; increase the application of potassium fertilizer can accelerate the development of young ears, promote early heading, fast heading, and early emergence of ears for 5 to 7 days.
Second, spray foliar fertilizer to improve the seed setting rate
In the period from the break of the booting stage to the 7th day of heading or the filling stage, 0.5 kg of urea per acre is added with 150 g of potassium dihydrogen phosphate, and 75 kg of water is sprayed on the leaves. "Cold Dew" lasts for 2 to 3 times, and can maintain 3 functional leaf greens, promote photosynthesis, increase seed setting rate and increase 1000-grain weight.
Third, irrigation and cold protection, improve the ability to resist "cold wind"
In the case of "cold dew", the field is filled with 10 cm to avoid yellowing of leaves and premature aging of roots. In the later stage, do not prematurely break the water, intermittently fill the "running horse water", grout until the yellow ripe period dry and wet and wet until 5 to 7 days before harvesting to break the water to reach the green branch wax stalk, thereby prolonging the life of the functional leaves and roots.
Fourth, spray "nine two zero", anti-enveloping neck
"Nine-two" is a crop growth regulator that promotes cell division, elongation and induction of amylase formation. After spraying "Nine-two", it can promote the elongation of the lower section, reduce the neck, loosening the ear layer, and full of pollen, which is conducive to improving pollination and fruiting. When the heading is 10% to 20%, spray "ä¹äºŒ0", the mu is used with "nine two zeros" 1.5 to 2 grams, such as high quality rice can be increased to 0.2 to 0.5 grams, add a small amount of alcohol to dissolve and then water 40 to 50 kilograms. Spray the leaves in the morning or evening to prevent necking and to head for 3 to 5 days.
5. Aging, premature aging, spraying "9:20", promoting early heading and anti-aging
Late insertion of overage aging jointed cockroaches, the main stem has obvious early ear phenomenon, the nutrition is concentrated on the rice plant with early heading, which delays or even inhibits the field tiller; the inconsistent field between the individuals of the throwing rice is 20% in heading. ～30%, the mu is sprayed with 1.5 grams of "nine two zeros" and 150 grams of potassium dihydrogen phosphate, which promotes the late splitting of the seedlings into the ear.
Premature aging field spraying "nine two zero", should be used in conjunction with foliar fertilizer. The acre uses "nine two zeros" 1.5 to 2 grams, dissolved in alcohol, then added 200 grams of potassium dihydrogen phosphate, 250 grams of urea, 50 to 60 kilograms of water, spraying the leaves in the Qisui to filling stage. At the same time pay attention to the prevention and control of pests and diseases, to prevent premature water loss in the later period
6. Spraying "Tianfengsu" from the heading stage to the filling stage to promote early heading and increasing grain weight
Spray the "Tianfengsu" one time from the heading stage to the filling stage in the late heading field, and use 10 ml (1 packet) per acre for 50 kg of water, before 10 am or after 4 pm and overcast Spraying the foliage and ear of rice in the day can promote the tidying of the ear, improve the seed setting rate and increase the 1000-grain weight. The effect is obvious.
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